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OGP P1/11 Geophysical position data exchange format – user guide

1. at H1 1 0 0 For N1 at H1 4 0 0 For M1 at H1 5 0 0 The format supports recording up to 3 coordinate tuples per position record each of which requires defining in the P1 specific part of the file header As well as position type specific information there may in fact be multiple and differing position types added which may be unrelated to seismic acquisition however they must be in one of the explicitly defined CRS definitions 6 1 1 Position Record Definitions Record Extension Fields The format allows for extensions to the content of data records This is done through a standard Record Extension Field for data records which is defined in Section 2 7 of the P1 11 Format Description Each of the above H1 header records defines a the number of record extension fields which are written into each position record and b the content of the extension Use of the record extension capability is described further in sections 8 and 9 of this User Guide 6 1 2 Position Record Definitions Quality Definition The P1 11 format supports the writing of quality measures against each position record File header record H1 1 0 1 contains the definition of each quality measure recorded with position data S1 amp P1 and H1 2 0 1 for receiver R1 data As standard each position record allows for the recording of a 2 dimensional error ellipse or 3
2. 1 8605 89 5 1 metre 1 HC 1 8 4 Y axis translation 1 8606 93 8 1 metre 1 HC 1 8 4 Z axis translation 1 8607 123 1 1 metre 1 HC 1 8 4 X axis rotation 1 8608 0 5 arc second 1 HC 1 8 4 Y axis rotation 1 8609 0 5 arc second 1 HC 1 8 4 Z axis rotation 1 8610 0 156 5 arc second 1 HC 1 8 4 Scale difference 1 8611 1 2 6 parts per million 1 HC 1 8 0 Transformation Number EPSG Code Name 2 1613 ED50 to WGS 84 24 1 HC 1 8 1 Source CRS Target CRS Version 2 1 4326 WGS 84 2 4230 ED50 EPSG Nor S62 2001 HC 1 8 2 Transformation Method 2 9606 Position Vector geog2D domain 1 7 HC 1 8 4 X axis translation 2 8605 90 365 1 metre 1 HC 1 8 4 Y axis translation 2 8606 101 13 1 metre 1 HC 1 8 4 Z axis translation 2 8607 123 384 1 metre 1 HC 1 8 4 X axis rotation 2 8608 0 333 5 arc second 1 HC 1 8 4 Y axis rotation 2 8609 0 077 5 arc second 1 HC 1 8 4 Z axis rotation 2 8610 0 894 5 arc second 1 HC 1 8 4 Scale difference 2 8611 1 994 6 parts
3. 13 8805 0 99987742 4 unity HC 1 5 2 False easting 13 8806 600000 1 metre HC 1 5 2 False northing 13 8807 2200000 1 metre HC 1 5 2 Latitude of false origin 11 8821 28 4 6 sexagesimal DMS HC 1 5 2 Longitude of false origin 11 8822 91 2 6 sexagesimal DMS HC 1 5 2 Latitude of 1st standard parallel 11 8823 29 18 6 sexagesimal DMS HC 1 5 2 Latitude of 2nd standard parallel 11 8824 30 42 6 sexagesimal DMS HC 1 5 2 Easting at false origin 11 8826 2000000 7 US survey foot HC 1 5 2 Northing at false origin 11 8827 2000000 7 US survey foot The Polar Stereographic Variant A operation method requires 5 parameters in record HC 1 5 2 and those for Universal Polar Stereographic North projection would be HC 1 5 2 Latitude of natural origin 1 8801 90 3 degree HC 1 5 2 Longitude of natural origin 1 8802 0 3 degree HC 1 5 2 Scale factor at natural origin 1 8805 0 994 4 unity HC 1 5 2 False easting 1 8806 2000000 1 metre HC 1 5 2 False northing 1 8807 2000000 1 metre The Hotine Oblique Mercator Variant A operation method requires 7 parameters and those for the Borneo RSO projection would be
4. 2 Recording Sercel SN408UL 1 0 2010 01 01 The following records HC 2 1 1 and HC 2 1 2 enable the inclusion of any attribute information about the production system using either a format defined see Table 12 in the P1 11 Format Description or user defined attribute code PSATTREF 3 2 Receiver Information HC 2 2 0 and HC 2 2 1 contain basic details of the type of receiver used in the survey and can be used to record attribute information in either format defined see Table 13 in the P1 11 Format Description or user defined codes RXATTREF The term inline implies the direction parallel to the direction in which the data were acquired as defined by the receivers In marine seismic data the inline direction is that in which the recording vessel tows the streamers Crossline implies in the direction perpendicular to the inline direction 25 OGP P1 11 Geophysical position data exchange format user guide OGP 4 Common Header Positioning Objects P1 11 introduces the concept of a positioning object Refer to Section 6 4 of the P1 11 Format Description for more detail An object in this sense is any object or node for which a position can be generated The key positioning objects in seismic acquisition are the source and receiver Positioning objects are defined in Common Header record HC 2 3 0 Note that a positioning object which is a receiver is defined in the HC 2 2 0 record Each object is giv
5. P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 33 T9 1 388213 70 4087455 30 36 92650718 16 25512852 36 92650718 16 25512852 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 34 T10 1 388126 20 4087503 60 36 92693209 16 25611790 36 92693209 16 25611790 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 1 V1 2 391491 50 4093323 60 36 97977813 16 21917611 36 97977813 16 21917611 17 30 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 14 V1E1 2 391500 20 4093347 50 36 97999453 16 21908181 36 97999453 16 21908181 17 30 Note that for demonstration purposes the third coordinate tuple the reference CRS is populated even though it is the same CRS as the second coordinate tuple WGS 84 OGP 70 International Association of Oil amp Gas Producers 2 SEG P1 1983 to OGP P1 11 An extract from the original SEG P1 file is given below H Quality Control EnSoCo Inc Date Tue Oct 25 15 08 45 2011 Used by permission of Seismic Exchange Inc for purposes of OGP format examples PROSPECT PA Westmoreland LINE PREFIX LINE 5NE 258 RESHOOT CODE LINE ID 567638 FILE NUMBER 5NE 258 LINE LENGTH 6 726 LENGTH UOM MI PROJECTION Lambert Conic Conformal 2SP EPSG Projection Code 9802 GEODETIC DATUM North American Datum 1927 EPSG Datum Code 6267 EPSG GEOGRAPHIC CS Pennsylvania CS27 South zo EPSG Code 13702 BASE Code 4267 EPSG PROJECTED CS NAD27 Pennsylvania South EPSG Code 32029 ELLIPSOID Clark
6. HC 2 3 0 Tailbuoy on S10 34 T10 10 Float 13 CC 1 0 0 SHOOTING POINT V1 MEAN CMP AT 0 0 100 0 CC 1 0 0 LINE CSL T21021P1002 321 SHOTS 1001 TO 1321 CC 1 0 0 GENERATED BY ORCA 1 8 1 FROM QC NRT DATABASE CC 1 0 0 VESSEL 1 ECHOSOUNDER 1 Echosounder 12 KHz CC 1 0 0 VELOCITY USED IN VESSEL 1 ECHOSOUNDER 1 1500 000000 M S CC 1 0 0 CALIBRATED CORRECTION USED IN VESSEL 1 ECHOSOUNDER 1 0 000000 M S CC 1 0 0 CALIBRATED VELOCITY CORRECTION HAS NOT BEEN APPLIED TO WATER DEPTHS 69 OGP P1 11 Geophysical position data exchange format user guide OGP CC 1 0 0 ORCA DOES NOT CORRECT RAW ECHO DATA FOR VESSEL PITCH ROLL AND HEAVE CC 1 0 0 VESSEL 1 ECHOSOUNDER 1 RAW DATA IS HEAVE COMPENSATED CC 1 0 0 12 SOURCE MAPPING G2 A 2 CC 1 0 0 12 SOURCE MAPPING G1 B 1 CC 1 0 0 13 STREAMER MAPPING A 1 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 H1 0 0 0 File Contents Description MEAN CMP Imported from P190 H1 0 1 0 Processing Details Converted from P190 File H1 0 2 0 Receiver Groups Per Shot 1 4800 H1 0 2 0 Original File 2 CSL T21021P1002 WGS 84 p190 H1 1 0 0 Position Record Type Definition 1 1 2 2 1 1 0 H1 1 0 0 Position Record Type Definition 2 1 2 2 1 1 1 1 5 Water Depth 1 H1 1 0 1 Position Record Quality Definition 1 0 No Quality Data Recorded 0 H1 1 0 1 Position Record Quality Definition 2 0 No Quality Data Recorded 0 H1 2 0 0 Receiver Record Type Definition 1 30 6 2 2 1 1 1 0 H1 2 0 1 Receiver Record Quality Definition 1 0 No Q
7. OGP 46 International Association of Oil amp Gas Producers Number Example Details 3 Projected CRS Hotine Oblique Mercator Geocentric translations transformation Timbalai 1948 RSO Borneo m urn ogc def crs EPSG 29873 RSO Borneo Grid m coordinate transformation urn ogc def coordinateOperation EPSG 1592 HC 1 0 0 Reference Systems Summary 5 0 4 2 HC 1 1 0 Unit of Measure 1 metre length 2 metre 9001 EPSG Dataset 7 6 9001 HC 1 1 0 Unit of Measure 2 radian angle 2 radian 9101 EPSG Dataset 7 6 9101 HC 1 1 0 Unit of Measure 3 degree angle 2 2 0 3 141592654 180 0 degree 9102 EPSG Dataset 7 6 9102 HC 1 1 0 Unit of Measure 4 unity scale 2 unity 9201 EPSG Dataset 7 6 9201 HC 1 1 0 Unit of Measure 5 sexagesimal DMS angle 29 3 0 0 0 0 sexagesimal DMS 9110 EPSG Dataset 7 6 9110 HC 1 1 1 Example Unit Conversion 1 2 1 3 57 295779513 HC 1 3 0 CRS Number EPSG Code Name Source 1 29873 Timbalai 1948 RSO Borneo m 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4298 Timbalai 1948 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 3 4326 WGS 84 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 4 4979 WGS 84 7 6 2010 11 02 EPSG HC 1 4 0 CRS Number EPSG Code Type Name 1 29873 1 projected Timbalai 1948 RSO Borneo m HC 1 4 3 Base Geographic CRS 1 2 4298 HC 1 4 4 Geodetic Datum 1 6298 Timbalai 1948 HC 1 4 5 Prime Meridian 1
8. X1 211104 11361 1 2831111 1065 16291 X1 311106 11361 1 2831111 1065 16291 X1 411104 13201 1 2831111 1065 16291 X1 511107 13311 1 2831111 1065 16291 X1 1811109 13311 1 3151111 1001 16291 X1 1811109 13311 316 3892111 1631 17031 X1 1811109 13311 392 6172111 1705 19291 X1 1911110 13311 1 3151111 1001 16291 X1 1911110 13311 316 3892111 1631 17031 X1 1911110 13311 392 6172111 1705 19291 X1 2011109 13361 1 3151111 1001 16291 X1 2011109 13361 316 3892111 1631 17031 X1 2011109 13361 392 6172111 1705 19291 X1 2111110 13361 1 3151111 1001 16291 X1 2111110 13361 316 3892111 1631 17031 X1 2111110 13361 392 6172111 1705 19291 X1 2211109 13401 1 3151111 1001 16291 X1 2211109 13401 316 3892111 1631 17031 X1 2211109 13401 392 6172111 1705 19291 X1 2311110 13401 1 3151111 1001 16291 OGP 82 International Association of Oil amp Gas Producers After conversion to OGP P1 11 format the above SPS 1 0 file looks like this OGP OGP P1 1 1 0 1 2011 11 18 08 54 43 apache_land_marine p111 EnSoCo Inc HC 0 1 0 Project Name SPSConversion Alaska Cook Inlet 2011 04 02 HC 0 2 0 Survey Description 2D Test TZ2D Marine Land Seismic Survey West Foreland 840 USA HC 0 3 0 Approximate Data Location 151 76 152 05 60 13 60 90 HC 0 4 0 Client Apache Alaska Corp HC 0 5 0 Geophysical Contractor SAExploration HC 0 6 0 Positioning Contractor Extreme Surveys HC 0 6 0 Positioning Contractor NCS Subsea HC 0 7 0 Position Processing Contractor EnSoCo Inc HC 0 7 0 Posi
9. 1 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 1 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 1 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 2 4230 2 geographic 2D ED50 HC 1 4 4 Geodetic Datum 2 6230 European Datum 1950 HC 1 4 6 Ellipsoid 2 7022 International 1924 6378388 1 metre 297 HC 1 6 0 Coordinate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 23 OGP P1 11 Geophysical position data exchange format user guide OGP HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 3 23031 1 projected ED50 UTM zone 31N HC 1 4 3 Base Geographic CRS 3 2 4320 HC 1 4 4 Geodetic Datum 3 6230 European Datum 1950 HC 1 4 6 Ellipsoid 3 7022 International 1924 6378388 1 metre 297 HC 1 5 0 Map Projection 3 16031 UTM zone 31N HC 1 5 1 Projection Method 3 9807 Transverse Mercator 5 H
10. GIGS JIP See GIGS and JIP GIGS Test Dataset OGP a dataset created to enable tests of coordinate operations based on use of the EPSG Dataset and using methods and formulae outlined in OGP Guidance Note 7 Part 1 Coordinate Conversions and Transformations including Formulas Note http www epsg org guides docs G7 2 pdf gravity related height or depth ISO TC211 height or depth dependent on the earth s gravity field Note 1 See also ellipsoidal height Note 2 Gravity related height is normally designated by H and depth by D grid north OGP the direction from a given location pointing along a line of equal easting or westing in a projected CRS Note Also known as map north height See gravity related height and ellipsoidal height International Standard Standard published by the International Organization for Standardization Note International Organization for Standardization is commonly abbreviated as ISO ISO 19111 International Standard describing a data model for geospatial metada Note 1 Its full title is Geographic information Spatial referencing by coordinates See www isotc211 org Note 2 See EPSG Data Model 101 OGP P1 11 Geophysical position data exchange format user guide OGP term definition ISO TC211 ISO Technical Committee 211 Its scope is defined as standardisation in the field of digital geographic information This work aims to
11. The error ellipse is considered to be the minimum requirement for all nodes in a network and therefore for new acquisition is mandatory Assuming systematic biases have been removed the error ellipse indicates the size of random errors in the position and also the direction in which the errors are occurring Error ellipses or ellipsoids are used in order to depict uncorrelated standard deviations in two or three dimensions Therefore for new acquisition it is mandatory to include a positional error estimate for each node that has a position record such as vessel CRP sources receivers tail buoys etc as defined below 2D a posteriori error ellipse Semi Major axis Semi Minor axis Theta orientation of ellipse major axis in relevant CRS Where appropriate and for a position record for a node where a vertical dimension is recorded the following is recommended 3D a posteriori error ellipsoid Horizontal semi major axis Horizontal semi minor axis Vertical semi major axis Theta orientation of ellipsoid horizontal major axis in relevant CRS The recommended confidence level for the error ellipse ellipsoid is 95 31 OGP P1 11 Geophysical position data exchange format user guide OGP General Comment on Quality Measures For the general 2 dimensional case an error ellipse is an approximate graphical representation of the standard deviation in two directions The semi major axis of this ellipse l
12. HC 1 5 2 Latitude of projection centre 1 8811 4 3 degree HC 1 5 2 Longitude of projection centre 1 8812 115 3 degree HC 1 5 2 Azimuth of initial line 1 8813 53 185691582 7 sexagesimal DMS HC 1 5 2 Angle from Rectified to Skew Grid 1 8814 53 07483685 7 sexagesimal DMS HC 1 5 2 Scale factor on initial line 1 8815 0 99984 4 unity HC 1 5 2 False easting 1 8806 0 1 metre HC 1 5 2 False northing 1 8807 0 1 metre The next two header records describe the coordinate system type in the CRS HC 1 6 0 and define the axes HC 1 6 1 Table 11 in the P1 11 Format Description contains a list of coordinate system types CSTYPEREF supported by the P formats The distinction between different coordinate system types is based on differences in their axial systems Ellipsoidal Cartesian and vertical are three types of coordinate system commonly used in the oil amp gas industry HC 1 6 0 Coordinate System Details not required for Compound CRS type The following descriptors are required in the P1 11 Common Header for certain commonly encountered coordinate system types HC 1 6 0 Coordinate System 1 4400 Cartesian 2D CS 2 Cartesian 2 HC 1 6 0 Coordinate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2
13. HC 1 8 0 Transformation Number EPSG Code Name 1 1313 NAD27 to NAD83 4 1 5 HC 1 8 1 Source CRS Target CRS Version 1 2 4267 NAD27 3 4269 NAD83 GC Can NT2 HC 1 8 2 Transformation Method 1 9615 NTv2 1 1 HC 1 8 3 Latitude and longitude difference file 1 8656 NTv2_0 gsb 1 HC 1 9 0 Example Point Conversion 1 1 57524 33 6542218 84 2 58 99983910 109 99906600 3 59 00000000 110 00000000 OGP 56 International Association of Oil amp Gas Producers Appendix C P1 11 Format Header Examples Number Mode Details 1 Marine Marine Towed Streamer 3D Quality records at end of example are indented for clarity but should normally be written on one line each OGP OGP P1 1 1 1 2011 11 04 21 23 52 CSL T21021P1002 p111 OGP HC 0 1 0 Project Name Test TEST01 2011 11 04 2011 11 05 HC 0 2 0 Survey Description Marine 3D Towed Streamer 1 VESSEL 2 SOURCE 10 STREAMER North Block 21 690 SYC HC 0 3 0 Approximate Data Location 37 038 36 974 16 178 16 223 HC 0 4 0 Client Oil Company Limited HC 0 5 0 Geophysical Contractor Oil Finder Inc HC 0 6 0 Positioning Contractor General Positioning Limited HC 0 7 0 Position Processing Contractor Position Processing Limited HC 1 0 0 Reference Systems Summary 5 1 8 2 HC 1 1 0 Unit of Measure 1 metre length 2 metre 9001 EPSG Dataset 7 6 9001 HC 1 1 0 Unit of Measure 2 radian angle 2 radian 9101 EPSG Dataset 7 6 9101 HC 1 1 0 Unit of Measure 3 degree angle 2 2 0 3 141592654 180 0 deg
14. International Association of Oil amp Gas Producers HC 2 3 0 Streamer S5 8 S5 2 Streamer 1 1 HC 2 3 0 Streamer S6 9 S6 2 Streamer 1 1 HC 2 3 0 Streamer S7 10 S7 2 Streamer 1 1 HC 2 3 0 Streamer S8 11 S8 2 Streamer 1 1 HC 2 3 0 Streamer S9 12 S9 2 Streamer 1 1 HC 2 3 0 Streamer S10 13 S10 2 Streamer 1 1 HC 2 3 0 Train 2 Echo 1 14 V1E1 11 Echo Sounder 1 HC 2 3 0 Tailbuoy on S1 25 T1 10 Float 4 HC 2 3 0 Tailbuoy on S2 26 T2 10 Float 5 HC 2 3 0 Tailbuoy on S3 27 T3 10 Float 6 HC 2 3 0 Tailbuoy on S4 28 T4 10 Float 7 HC 2 3 0 Tailbuoy on S5 29 T5 10 Float 8 HC 2 3 0 Tailbuoy on S6 30 T6 10 Float 9 HC 2 3 0 Tailbuoy on S7 31 T7 10 Float 10 HC 2 3 0 Tailbuoy on S8 32 T8 10 Float 11 HC 2 3 0 Tailbuoy on S9 33 T9 10 Float 12 HC 2 3 0 Tailbuoy on S10 34 T10 10 Float 13 CC 1 0 0 SHOOTING POINT V1 MEAN CMP AT 0 0 100 0 CC 1 0 0 LINE CSL T21021P1002 321 SHOTS 1001 TO 1321 CC 1 0 0 GENERATED BY ORCA 1 8 1 FROM QC NRT DATABASE CC 1 0 0 VESSEL 1 ECHOSOUNDER 1 Echosounder 12 KHz CC 1 0 0 VELOCITY USED IN VESSEL 1 ECHOSOUNDER 1 1500 000000 M S CC 1 0 0 CALIBRATED CORRECTION USED IN VESSEL 1 ECHOSOUNDER 1 0 000000 M S CC 1 0 0 CALIBRATED VELOCITY CORRECTION HAS NOT BEEN APPLIED TO WATER DEPTHS CC 1 0 0 ORCA DOES NOT CORRECT RAW
15. vertical datum ISO TC211 datum describing the relation of gravity related heights or depths to the Earth vertical transformation GIGS coordinate transformation applied to heights or depths Note This may apply to gravity related heights or depths and to 1D engineering CRSs with a vertical coordinate axis wellbore survey data GIGS the set of Measured Depth MD azimuth and inclination tuples observed in points along a wellbore in a wellbore survey well track GIGS the set of coordinates of identified points along the wellbore calculated from wellbore survey data for that wellbore westing OGP distance in a coordinate system westwards positive or eastwards negative from a north south reference line Note westing is rarely encountered and is only applicable to coordinate systems that are positive westward and may be designated by e g W x or y depending upon the coordinate system in use with a specific CRS For further information and publications please visit our website at www ogp org uk 209 215 Blackfriars Road London SE1 8NL United Kingdom Telephone 44 0 20 7633 0272 Fax 44 0 20 7633 2350 165 Bd du Souverain 4th Floor B 1160 Brussels Belgium Telephone 32 0 2 566 9150 Fax 32 0 2 566 9159 Internet site www ogp org uk e mail reception ogp org uk
16. 1 8827 0 5 US survey foot HC 1 6 0 Coordinate System 1 4497 Cartesian 2D CS 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 1 1 37 Easting east X 5 US survey foot HC 1 6 1 Coordinate System Axis 2 1 2 38 Northing north Y 5 US survey foot HC 1 4 0 CRS Number EPSG Code Type Name 2 4267 2 geographic 2D NAD27 HC 1 4 4 Geodetic Datum 2 6267 North American Datum 1927 HC 1 4 5 Prime Meridian 2 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 2 7008 Clarke 1866 6378206 4 1 metre 294 9787 HC 1 6 0 Coordinate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 3 4326 2 geographic 2D WGS 84 HC 1 4 4 Geodetic Datum 3 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 3 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 3 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 3 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 3 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 3 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 4 4979 3 geographic 3D WGS 84 HC 1 4 4 Geodetic Datum 4 6326 World Geodetic System 1984 OGP 50 International Association of Oil amp Gas Producers HC 1 4 5 Prime Meridian 4 8901 Greenwich 0 3 degr
17. 388824 25 4087112 45 36 92288594 16 24815996 36 92151314 16 24942887 3 2 1 1 164 2 1 3 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 27 T3 1 388737 21 4087161 98 36 92332562 16 24914304 36 92191672 16 25047226 3 3 1 1 174 2 1 2 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 28 T4 1 388650 27 4087211 20 36 92375972 16 21501272 36 92241012 16 25145264 3 4 1 0 184 2 1 1 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 29 T5 1 388562 68 4087259 15 36 98241842 16 25211176 36 92281262 16 25242468 3 1 1 0 194 2 1 2 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 30 T6 1 388475 32 4087308 21 36 92946118 16 25231047 36 92321538 16 25343239 3 6 1 1 204 2 1 0 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 31 T7 1 388387 13 4087355 33 36 92500268 16 25314017 36 92361687 16 25443029 3 4 1 1 214 2 1 1 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 32 T8 1 388300 64 4087405 64 36 92541698 16 25408500 36 92411118 16 25540293 3 8 1 1 224 2 1 2 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 33 T9 1 388213 73 4087455 35 36 92590174 16 25506268 36 92451494 16 25639221 3 4 1 2 234 2 1 0 OGP 64 International Association of Oil amp Gas Producers Number Mode Details 2 Marine Marine Towed Streamer 3D Receiver Position Records The first example shows single receiver records per line It is converted from legacy data which did not include quality parameters R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1
18. 45 OGP P1 11 Geophysical position data exchange format user guide OGP HC 1 4 4 Geodetic Datum 5 6269 North American Datum 1983 HC 1 4 5 Prime Meridian 5 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 5 7019 GRS 1980 6378137 1 metre 298 257222101 HC 1 6 0 Coordinate System 5 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 5 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 5 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 6 4326 2 geographic 2D WGS 84 HC 1 4 4 Geodetic Datum 6 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 6 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 6 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 6 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 6 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 6 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 7 4979 3 geographic 3D WGS 84 HC 1 4 4 Geodetic Datum 7 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 7 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 7 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 7 6423 Ellipsoidal 3D CS 3 ellipsoidal 3 HC 1 6 1 Coordinate System Axis 1 7 1 108 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 7 2 109 Geodetic longitude east Long 3 degree HC 1
19. 79 39957938 S1 0 5NE 258 17 1 1 SP 1 1539755 0 354058 0 1065 40 29347039 79 39997341 40 29351697 79 39972812 S1 0 5NE 258 18 1 1 SP 1 1539679 0 354292 0 1056 40 29410874 79 40026148 40 29415531 79 40001616 S1 0 5NE 258 19 1 1 SP 1 1539814 0 354485 0 1037 40 29464537 79 39979054 40 29469192 79 39954519 S1 0 5NE 258 20 1 1 SP 1 1540007 0 354636 0 1033 40 29506971 79 39910889 40 29511897 79 39886357 73 OGP P1 11 Geophysical position data exchange format user guide OGP 3 SEG SPS001 to OGP P1 11 Extracts from the original SPS001 files are given below H000SPS format version num SPS001 03 01 00 H010Description of survey area Alaska Cook Inlet TZ2D 00001 H020Date of survey 04 02 11 H021Postplot date of issue 07 14 11 H022Tape disk identifier West Foreland 2D Test H030Client Apache H040Geophysical contractor Northern Exploration Services H050Positioning contractor Extreme Surveys amp NCS SubSea H060Pos proc contractor Ensoco amp NCS SubSea H070Field computer system s None SN428 Manual Entry H080Coordinate location Center of Source and of Receiver Patterns H090Offset to coord location H100Clock time w r t GMT 8 H110Spare H120Geodetic datum spheroid NAD 27 CLARKE 1866 6378206 4 294 978698214 H130Spare H140Geodetic datum parameters North American Datum 1927 NADCON H150Spare H160Spare H170Vertical datum description NGVD29 H180Projection type Tran
20. Geographic3D to 2D conversion 1 0 HC 1 8 2 Transformation Method 3 9613 NADCON 1 2 In the event that a coordinate operation method code Field 7 is not available in the EPSG Dataset unlikely as the EPSG dataset supports nearly all methods currently in use in the oil and gas industry the coordinate transformation cannot be directly supported Inclusion of the new method in the EPSG Dataset can be requested through the OGP Geodesy Subcommittee at http www epsg org Comms Comment asp or by general enquiry to the OGP Geomatics Committee at http info ogp org uk geomatics HC 1 8 3 Transformation Parameter File Details Where transformation is carried out by means of parameter files such as NADCON these are defined in the Common Header HC 1 8 3 as follows HC 1 8 3 Latitude difference file 3 8657 conus las 1 HC 1 8 3 Longitude difference file 3 8658 conus los 1 HC 1 8 4 Transformation Parameter Details A 7 parameter transformation would be defined in the Common Header as follows repeating HC 1 8 4 for each parameter HC 1 8 4 X axis translation 1 8605 90 365 1 metre 1 HC 1 8 4 Y axis translation 1 8606 101 13 1 metre 1 HC 1 8 4 Z axis translation 1 8607 123 384 1 metre 1 HC 1 8 4 X axis rotation 1 8608 0 333 5 arc
21. HC 1 5 2 Latitude of natural origin 1 8801 0 3 degree HC 1 5 2 Longitude of natural origin 1 8802 54 3 degree HC 1 5 2 False easting 1 8806 5000000 1 metre HC 1 5 2 False northing 1 8807 10000000 1 metre HC 1 6 0 Coordinate System 1 4499 Cartesian 2D CS 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 1 1 41 Easting east X 1 metre HC 1 6 1 Coordinate System Axis 2 1 2 42 Northing north Y 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 2 4618 2 geographic 2D SAD69 HC 1 4 4 Geodetic Datum 2 6618 South American Datum 1969 HC 1 4 5 Prime Meridian 2 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 2 7050 GRS 1967 Modified 6378160 1 metre 298 25 HC 1 6 0 Coordinate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 3 4326 2 geographic 2D WGS 84 HC 1 4 4 Geodetic Datum 3 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 3 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 3 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 3 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 3 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 3 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 4 4979 3 geographic 3D WGS 84 HC 1 4 4 Geo
22. HC 1 6 0 Coordinate System 3 6423 Ellipsoidal 3D CS 3 ellipsoidal 3 HC 1 6 0 Coordinate System 4 4400 Cartesian 3D CS 2 Cartesian 3 HC 1 6 0 Coordinate System 5 6498 Vertical CS 5 vertical 1 HC 1 6 0 Coordinate System 10 6499 Vertical CS 5 vertical 1 HC 1 6 0 Coordinate System 15 1026 Cartesian 2D CS for UPS north 2 Cartesian 2 20 International Association of Oil amp Gas Producers OGP HC 1 6 1 Coordinate Axis Details The coordinate axis defines the meaning of coordinate values in data records The coordinate order is an integer from 1 onwards with which the Coordinate n value in the data records shall be consistent Coordinate n in a data record references coordinate axis n Coordinate axis definitions would appear in the P1 11 Common Header as follows Ellipsoidal CS for 2D amp 3D geographic CRS HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 6 1 Coordinate System Axis 1 3 1 108 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 3 2 109 Geodetic longitude east Long 3 degree HC 1 6 1 Coordinate System Ax
23. N1 and M1 data records are defined in header records H1 1 0 0 H1 2 0 0 H1 3 0 0 H1 4 0 0 and H1 5 0 0 respectively These header records also carry the definition of each extension As described in Section 2 7 of the P1 11 Format Description a standard record extension definition consists of a block of four sub fields separated by semi colons A unique identifier for the extension A conditional additional parameter required by some extension data usually the coordinate reference system internal code CRSREF The name of the data value The data value unit code UNITREF Then in the data record the values of each extension attribute are given in the last field of the record in a block separated by semi colons To allow flexibility in extension records for example adding one attribute for source location and zero or more different attributes for a different positioning object the OBJREF code in HC 2 3 0 and the H1 1 0 0 header record field 6 which requires a unique record type identifier P1TYPEREF to be defined together provide a unique identification of a positioning object in the data records In a similar manner receiver records can be differentiated in the position records by their OBJREF RX code in HC 2 2 0 and P1RXTYPEREF identifier in H1 2 0 0 This may be important in a transition zone survey where receivers of different types are deployed with different record extension fields and quality mea
24. When documenting such data the operation s method including its formula and its parameters shall be taken from the EPSG Dataset In this case the EPSG coordinate operation method code and coordinate operation parameter code must be included in the relevant CRS header records It is the responsibility of the file creator to ensure that the map projection or coordinate transformation method parameters and values are genuinely consistent with the EPSG method Projected Coordinate Reference System e g ETRS89 UTM zone 28N Datum Coordinate System Map Projection is comprised of Figure 4 Conceptual Model of a Projected Coordinate Reference System 14 International Association of Oil amp Gas Producers OGP In the unlikely event that a coordinate operation method code or coordinate operation parameter code is not available in the EPSG Dataset it cannot be directly or immediately supported Inclusion of the new method in the EPSG Dataset can be requested through the OGP Geodesy Subcommittee at http www epsg org Comms Comment asp or by general enquiry to the OGP Geomatics Committee at http info ogp org uk geomatics Coordinate Operation Reversibility Most but not all coordinate operation methods allow for coordinates to be changed in both directions i e from CRS A to CRS B and from CRS B to CRS A These are reversible In some reversible methods the values of the parameters may require their sign to be
25. coordinate conversion from an ellipsoidal coordinate system to a plane Note Also see coordinate conversion MD Measured Depth in well log data metadata ISO TC211 data about data Example CRS metadata gives all the parameters that are necessary to interpret the meaning of coordinate data and correlate them with other coordinate datasets nomenclature GIGS names definitions and terminology applied to given class of data Used particularly with reference to geodetic data objects and their associated geodetic parameters in the EPSG Dataset northing ISO TC211 distance in a coordinate system northwards positive or southwards negative from an east west reference line Note Northing may be designated by e g N y or x depending upon the coordinate system in use with the relevant CRS OGC the Open Geospatial Consortium Inc a non profit international voluntary consensus standards organisation that is leading the development of standards for geospatial and location based services Note See www opengeospatial org OGP OGP the International Association of Oil amp Gas Producers encompasses most of the world s leading publicly traded private and state owned oil amp gas companies oil amp gas associations and major upstream service companies Note See www ogp org uk 102 International Association of Oil amp Gas Producers OGP term definition P1 84 OGP Industry standard se
26. metre HC 2 3 1 Nominal Air Pressure 18 29 2000 19 pounds square inch HC 2 3 1 Number of Sub Arrays 18 30 1 HC 2 3 1 Nominal Towing Depth 18 31 2 0 1 metre CC 1 0 0 Source of coordinates 1st Layout Index 1 CC 1 0 0 Land Shots Extreme Surveys Postplot CC 1 0 0 Marine Shots Ensoco Postplot CC 1 0 0 Land Nodes Line 102 Sta 1001 1613 Extreme Surveys Postplot CC 1 0 0 Marine Nodes Line 102 Sta 1615 1977 Ensoco Postplot CC 1 0 0 Land Receivers Line 111 Sta 1001 1629 Extreme Surveys Postplot CC 1 0 0 Marine Receivers Line 111 Sta 1631 1717 Extreme Surveys Postplot CC 1 0 0 Marine Receivers Line 111 Sta 1719 1975 NCS Drop Locations CC 1 0 0 Source of coordinates 2nd Layout Index 2 CC 1 0 0 Land Shots Extreme Surveys Postplot CC 1 0 0 Marine Shots Ensoco Postplot CC 1 0 0 Land Nodes Line 102 Sta 1001 1613 Extreme Surveys Postplot CC 1 0 0 Marine Nodes Line 102 Sta 1615 1977 Ensoco Postplot CC 1 0 0 Land Receivers Line 111 Sta 1001 1629 Extreme Surveys Postplot CC 1 0 0 Marine Receivers Line 111 Sta 1631 1659 Extreme Surveys Postplot CC 1 0 0 Marine Receivers Line 111 Sta 1661 1913 Ensoco Postplot CC 1 0 0 CC 1 0 0 NOTE TO PROCESSORS CC 1 0 0 An extra FDU was mistakenly inserted between receivers 111 1703 and 111 1705 for FFID 0001 0727 CC 1 0 0 This FDU has been edited out of the Relational file CC 1 0 0 Note the 2 channel gap between these 2 stations CC 1 0 0 CC 1 0 0 The extra FDU between receivers 111 1703
27. sequence of reprocessing Complete and correct definition of the coordinate reference system is essential to unambiguously define the coordinates in the P1 11 file This is done in the CRS section of the Common Header where all the CRSs relevant to the data in the file shall be explicitly described and whenever possible should also be implicitly identified Explicitly described refers to writing all the CRS defining parameters and associated values to the file header in records HC 1 4 0 through HC 1 6 0 Datum e g European Terrestial Reference System 1989 Datum e g European Datum 1950 Coordinate System e g ECR geocentric Coordinate System e g Ellipsoidal 2D is comprised of is comprised of Coordinate Operation ETRS89 to ED50 Coordinate Tuple e g X Y Z Coordinate Tuple e g Source Coordinate Reference System e g ETRS89 Target Coordinate Reference System e g ED50 inputs outputs is referenced to is referenced to Figure 3 Conceptual model for spatial referencing by coordinates 12 International Association of Oil amp Gas Producers OGP Implicitly identified refers to writing the associated EPSG code and name for the CRS to the file header in record HC 1 3 0 The EPSG Dataset includes definitions for the vast majority of CRSs used in the oil and gas industry but occasionally a proprietary CRS not in the EPSG Dataset will be encountered and in these circu
28. 084 15 38 14 0 12 E7 1 152123 2 2482509 4 23 5 60 78088268 151 94659663 60 78031637 151 94885064 32 25 S1 0 110 1336 1 2011 084 15 42 28 0 13 E8 1 152137 3 2482515 0 23 2 60 78089913 151 94651871 60 78033283 151 94877273 36 35 S1 0 109 1340 1 2011 084 15 48 56 0 12 E7 1 152241 3 2482201 7 23 2 60 78005097 151 94588521 60 77948464 151 94813935 29 25 S1 0 110 1340 1 2011 084 15 51 35 0 13 E8 1 152254 8 2482206 8 23 2 60 78006601 151 94581057 60 77949968 151 94806471 30 32 S1 0 109 1653 1 2011 084 15 54 22 0 12 E7 1 161478 0 2458073 9 12 3 60 71481957 151 89034961 60 71425100 151 89260838 8 25 S1 0 109 1357 1 2011 084 16 01 20 0 12 E7 1 152742 6 2480891 8 23 1 60 77651017 151 94286523 60 77594374 151 94511991 28 25 S1 0 109 1648 1 2011 084 16 03 07 0 12 E7 1 161323 6 2458470 0 13 3 60 71589044 151 89127491 60 71532191 151 89353368 8 25 S1 0 110 1357 1 2011 084 16 03 53 0 13 E8 1 152756 7 2480897 1 22 9 60 77652580 151 94278728 60 77595937 151 94504195 28 35 S1 0 110 1648 1 2011 084 16 07 04 0 13 E8 1 161337 7 2458475 6 13 3 60 71590686 151 89119712 60 71533834 151 89345590 5 25 S1 0 109 1360 1 2011 084 16 09 51 0 12 E7 1 152831 5 2480660 2 23 2 60 77588414 151 94232986 60 77531770 151 94458463 23 25 S1 0 110 1360 1 2011 084 16 12 19 0 13 E8 1 152845 2 2480665 8 23 0 60 77590056 151 94225419 60 77533412 151 94450896 2
29. 23031 ED50 UTM zone 31N 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4230 ED50 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 3 5715 MSL depth 8 0 2012 08 10 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 4 ED50 UTM zone 31N MSL depth 35 OGP P1 11 Geophysical position data exchange format user guide OGP HC 1 3 0 CRS Number EPSG Code Name Source 5 4326 WGS 84 7 6 2010 11 02 EPSG HC 2 3 0 Source Array G1 1 G1 4 Air Gun Note OBJREF in green underlined CC 1 0 0 Record extension field definition for Water Depth with Position Record Type 1 H1 1 0 0 Position Record Type Definition 1 4 2 5 1 1 1 3 Water Depth 1 Note P1TYPEREF in red underlined S1 0 T21021P1002 1001 1 2010 246 14 56 23 0 1 G1 1 356383 46 6542889 15 6 5 59 00000000 0 500000 00 58 99940028 0 49833833 150 4 Many of the pre defined extension data types are depth related A discussion on handling the vertical dimension is given in section 9 below To describe two user defined attributes for example water temperature and salinity measurements as position record extensions would require the following header records 1 Definition of the units of measure HC 1 1 0 Unit of Measure 17 degrees Celsius thermodynamic temperature 2 16 273 15 1 1 0 Temperature scale POSC UOM Dictionary 2 2 degC HC 1 1 0 Unit of Measure 19 parts per thousand volumic con
30. 246 14 56 23 0 3 amp 4 G2 amp S1 1 391436 30 4092730 50 36 97442649 16 21971087 36 97442649 16 21971087 2 2 1 2 184 1 1 1 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 5 G2 amp S2 1 391392 60 4092755 00 36 97464225 16 22020526 36 97464225 16 22020526 2 4 1 2 194 8 1 3 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 6 G2 amp S3 1 391349 00 4092779 40 36 97485712 16 22069852 36 97485712 16 22069852 2 5 1 3 204 4 1 4 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 7 G2 amp S4 1 391305 30 4092803 90 36 97507287 16 22119292 36 97507287 16 22119292 2 1 1 1 214 5 1 1 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 8 G2 amp S5 1 391261 60 4092828 30 36 97528773 16 22168731 36 97528773 16 22168731 2 3 1 0 224 5 1 3 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 9 G2 amp S6 1 391218 00 4092852 70 36 97550259 16 22218057 36 97550259 16 22218057 2 2 1 2 234 8 1 2 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 10 G2 amp S7 1 391174 40 4092877 20 36 97571835 16 22267386 36 97571835 16 22267386 2 2 1 2 154 2 1 2 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 11 G2 amp S8 1 391130 70 4092901 70 36 97593410 16 22316827 36 97593410 16 22316827 2 8 1 1 164 4 1 1 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 12 G2 amp S9 1 391087 00 4092926 10 36 97614894 16 22366266 36 97614894 16 22366266 2 1 1 4 174 7 0 9 P1 0 T21021P1002 1001 1 2010 246 14 56 2
31. 4 7 Vertical Datum 5 5113 Sea Level HC 1 6 0 Coordinate System 5 6498 Vertical CS 5 vertical 1 HC 1 6 1 Coordinate System Axis 1 5 1 113 Depth down D 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 6 6 compound ED50 UTM zone 28N SL depth HC 1 4 1 Compound Horizontal CRS 6 1 ED50 UTM zone 28N SL depth HC 1 4 2 Compound Vertical CRS 6 5 ED50 UTM zone 28N SL depth HC 1 4 0 CRS Number EPSG Code Type Name 7 4326 2 geographic 2D WGS 84 HC 1 4 4 Geodetic Datum 7 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 7 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 7 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 7 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 7 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 7 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 8 4979 3 geographic 3D WGS 84 HC 1 4 4 Geodetic Datum 8 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 8 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 8 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 8 6423 Ellipsoidal 3D CS 3 ellipsoidal 3 HC 1 6 1 Coordinate System Axis 1 8 1 108 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 8 2 109 Geodetic longitude east Long 3 degree HC 1 6 1 Coordinate System Axis 3 8 3 110 Ellipsoidal height up h 1 metre HC 1 7 0 Transformation Number EPSG
32. 4089120 20 7 50 36 94111323 16 23610492 36 93975556 16 23743419 179 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 150 389759 00 4088784 70 7 50 36 93807032 16 23791073 36 93671260 16 23923998 149 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 120 389594 00 4088449 80 7 50 36 93503282 16 23971425 36 93367505 16 24104346 119 Note that in the above example there are 30 receiver records per line receivers 480 to 451 in the first line etc This is indicated in the header section HC 2 0 0 field 7 The second and subsequent receivers in the same line contain only a position in the first CRS fields the coordinate tuples in the second and third CRS positions are not repeated 65 OGP P1 11 Geophysical position data exchange format user guide OGP Appendix E Examples of Legacy Formats converted to P1 11 These examples are provided in order to demonstrate how legacy formats would appear after conversion to P1 11 If there is a compelling reason to convert a file from a legacy version to the new P1 format it is recommended this should be done using software and not be attempted manually 1 P1 90 to OGP P1 11 The header and some source position records extracted from the original P1 90 file is given below H0100SURVEY AREA North Block 21 H0101GENERAL SURVEY DETAILS 1 VESSEL 2 SOURCE 10 STREAMER H0102VESSEL DETAILS Train 2 1 H0103SOURCE DETAILS G1 1 1 H0103SOURCE DETAILS G2 1 2 H0104ST
33. 4092475 40 7 50 36 97154255 16 21804800 36 97018541 16 21937761 479 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 450 391410 10 4092139 40 7 50 36 96849539 16 21985628 36 96713820 16 22118586 449 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 420 391244 90 4091803 90 7 50 36 96545272 16 22166337 36 96409547 16 22299291 419 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 390 391079 70 4091468 00 7 50 36 96240642 16 22347026 36 96104912 16 22479976 389 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 360 390914 70 4091132 50 7 50 36 95936372 16 22527481 36 95800637 16 22660429 359 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 330 390749 40 4090796 70 7 50 36 95631826 16 22708256 36 95496085 16 22841200 329 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 300 390584 40 4090461 40 7 50 36 95327731 16 22888686 36 95191985 16 23021627 299 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 270 390419 20 4090125 80 7 50 36 95023361 16 23069323 36 94887610 16 23202260 269 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 240 390254 30 4089790 60 7 50 36 94719352 16 23249614 36 94583596 16 23382548 239 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 210 390089 20 4089455 30 7 50 36 94415248 16 23430114 36 94279486 16 23563046 209 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 180 389924 20
34. 5 2447938 6 085091021 S101 17821A6 7 52 164947 9 2448020 5 085091034 S101 17811A6 7 52 164937 4 2448104 4 085091047 S101 17801A6 7 52 164927 0 2448188 0 085091100 S101 17791A6 7 52 164913 8 2448272 8 085091113 S101 17781A6 7 54 164895 7 2448354 4 085091126 S101 17771A6 7 56 164872 0 2448432 6 085091140 S101 17761A6 7 59 164840 2 2448509 2 085091154 S101 17751A6 7 60 164806 9 2448585 4 085091208 S101 17741A6 7 61 164774 5 2448660 9 085091222 S101 17731A6 7 61 164744 7 2448737 7 085091236 S101 17721A6 7 60 164715 5 2448815 0 085091250 S101 17711A6 7 57 164684 5 2448891 8 085091304 OGP 80 International Association of Oil amp Gas Producers S101 17701A6 7 55 164652 6 2448968 4 085091318 S101 17691A6 7 52 164621 7 2449044 7 085091333 S101 17681A6 7 50 164592 4 2449122 0 085091347 S101 17671A6 7 46 164567 1 2449200 3 085091400 S101 17661A6 7 41 164546 7 2449280 3 085091413 Sample land receiver position data from this survey R111 10011G1 142195 5 2508346 4 707 6 R111 10031G1 142253 5 2508192 2 690 2 R111 10051G1 142312 5 2508038 7 682 2 R111 10071G1 142371 6 2507883 7 662 1 R111 10091G1 142430 9 2507729 9 650 4 R111 10111G1 142489 4 2507576 1 638 0 R111 10131G1 142548 6 2507421 5 613 4 R111 10151G1 142607 8 2507267 7 605 7 R111 10171G1 142667 3 2507113 3 587 5 R111 10191G1 142725 5 2506959 8 579 6 R111 10211G1 142784 7 2506805 8 575 4 R111 10231G1 142843 0 2506651 2 574 4 R111 10251G1 142902 6 2506497 5 571 8 R111 10271G1 142961 6
35. 6 1 Coordinate System Axis 3 7 3 110 Ellipsoidal height up h 1 metre HC 1 7 0 Transformation Number EPSG Code Name Source 1 1241 NAD27 to NAD83 1 7 6 2010 11 02 EPSG HC 1 7 0 Transformation Number EPSG Code Name Source 2 1188 NAD83 to WGS 84 1 7 6 2010 11 02 EPSG HC 1 7 0 Transformation Number EPSG Code Name Source 3 15593 geographic3D to geographic2D 7 6 2010 11 02 EPSG HC 1 8 0 Transformation Number EPSG Code Name 1 1241 NAD27 to NAD83 1 0 15 HC 1 8 1 Source CRS Target CRS Version 1 2 4267 NAD27 5 4269 NAD83 NGS Usa Conus HC 1 8 2 Transformation Method 1 9613 NADCON 1 2 HC 1 8 3 Latitude difference file 1 8657 conus las 1 HC 1 8 3 Longitude difference file 1 8658 conus los 1 HC 1 8 0 Transformation Number EPSG Code Name 2 1188 NAD83 to WGS 84 1 4 HC 1 8 1 Source CRS Target CRS Version 2 5 4269 NAD83 6 4326 WGS 84 DMA N Am HC 1 8 2 Transformation Method 2 9603 Geocentric translations geog2D domain 1 3 HC 1 8 4 X axis translation 2 8605 0 1 metre 1 HC 1 8 4 Y axis translation 2 8606 0 1 metre 1 HC 1 8 4 Z axis translation 2 8607 0 1 metre 1 HC 1 8 0 Transformation Number EPSG Code Name 3 15593 geographic3D to geographic2D HC 1 8 1 Source CRS Target CRS Version 3 7 4979 WGS 84 6 4326 WGS 84 HC 1 8 2 Transformation Method 3 9659 Geographic3D to 2D conversion 1 0 HC 1 9 0 Example Point Conversion 1 1 843588 45 10896474 66 2 29 99979780 89 51772720 5 30 00000000 89 51777780 6 30 00000000 89 51777780
36. Code Name Source 3 5714 Elevation Above Mean Sea Level 7 9 2011 08 17 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 4 NAD27 Pennsylvania South Elevation Above Mean Sea Level HC 1 3 0 CRS Number EPSG Code Name Source 5 4326 WGS 84 7 9 2011 08 17 EPSG HC 1 4 0 CRS Number EPSG Code Type Name 1 4455 1 Projected NAD27 Pennsylvania South HC 1 4 3 Base Geographic CRS 1 2 4267 HC 1 4 4 Geodetic Datum 1 6267 North American Datum 1927 HC 1 4 5 Prime Meridian 1 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 1 7008 Clarke 1866 6378206 4 1 metre 294 97869820 HC 1 5 0 Map Projection 1 4436 Pennsylvania CS27 South zone HC 1 5 1 Projection Method 1 9802 Lambert Conic Conformal 2SP 6 HC 1 5 2 Latitude of false origin 1 8821 39 2 6 sexagesimal DMS HC 1 5 2 Longitude of false origin 1 8822 77 45 6 sexagesimal DMS HC 1 5 2 Latitude of 1st standard parallel 1 8823 40 58 6 sexagesimal DMS HC 1 5 2 Latitude of 2nd standard parallel 1 8824 39 56 6 sexagesimal DMS HC 1 5 2 Easting at false origin 1 8826 2000000 5 US Survey Foot HC 1 5 2 False northing 1 8827 0 5 US Survey Foot HC 1 6 0 Coordinate System 1 4497 Cartesian 2D CS 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 1 1 37 Easting east X 5 US Survey Foot HC 1 6 1 Coordinate System Axis 2 1 2 38 Northing north Y 5 US Survey Foot HC 1 4 0 CRS Number EPSG Code Type Name 2 4267 2 Geographic 2D NAD27 HC 1 4 4 Geodetic Datum 2 6267
37. Datum 3 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 3 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 3 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 3 6423 Ellipsoidal 3D CS 3 ellipsoidal 3 HC 1 6 1 Coordinate System Axis 1 3 1 108 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 3 2 109 Geodetic longitude east Long 3 degree HC 1 6 1 Coordinate System Axis 3 3 3 110 Ellipsoidal height up h 1 metre HC 1 7 0 Transformation Number EPSG Code Name Source 1 15593 geographic3D to geographic2D 7 6 2010 11 02 EPSG HC 1 8 0 Transformation Number EPSG Code Type Name 1 15593 2 conversion geographic3D to geographic2D HC 1 8 1 Source CRS Target CRS Version 1 3 4979 WGS 84 2 4326 WGS 84 HC 1 8 2 Transformation Method 1 9659 Geographic3D to 2D conversion 1 0 49 OGP P1 11 Geophysical position data exchange format user guide OGP Number Example Details 5 Projected CRS Lambert Conic Conformal 2SP US State Plane grid NAD27 Louisiana CS27 South US survey feet HC 1 0 0 Reference Systems Summary 6 0 4 2 HC 1 1 0 Unit of Measure 1 metre length 2 metre 9001 EPSG Dataset 7 6 9001 HC 1 1 0 Unit of Measure 2 radian angle 2 radian 9101 EPSG Dataset 7 6 9101 HC 1 1 0 Unit of Measure 3 degree angle 2 2 0 3 141592654 180 0 degree 9102 EPSG Dataset 7 6 9102 HC 1 1 0 Unit of Measure 4 unity scale 2 unity 9201 EPSG Dataset 7 6 9201
38. ECHO DATA FOR VESSEL PITCH ROLL AND HEAVE CC 1 0 0 VESSEL 1 ECHOSOUNDER 1 RAW DATA IS HEAVE COMPENSATED CC 1 0 0 12 SOURCE MAPPING G2 A 2 CC 1 0 0 12 SOURCE MAPPING G1 B 1 CC 1 0 0 13 STREAMER MAPPING A 1 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 H1 0 0 0 File Contents Description MEAN CMP Imported from P190 H1 0 1 0 Processing Details Converted from P190 File H1 0 2 0 Receiver Groups Per Shot 1 4800 H1 0 2 0 Original File 2 CSL T21021P1002 WGS 84 p190 H1 1 0 0 Position Record Type Definition 1 1 2 7 1 1 0 H1 1 0 0 Position Record Type Definition 2 1 2 7 1 1 1 1 5 Water Depth 1 H1 1 0 1 Position Record Quality Definition 1 95 Absolute Error Ellipses 1 3 4 100 External Reliability 1 101 Unit Variance 4 102 Deg Freedom 4 103 No observations 4 H1 1 0 1 Position Record Quality Definition 2 95 Absolute Error Ellipses 1 3 4 100 External Reliability 1 101 Unit Variance 4 102 Deg Freedom 4 103 No observations 4 H1 2 0 0 Receiver Record Type Definition 1 1 6 2 7 1 1 1 0 H1 2 0 1 Receiver Record Quality Definition 95 Absolute Error Ellipses 1 3 5 100 External Reliability 1 101 Unit Variance 4 102 Deg Freedom 4 107 Distance from nearest network node 1 108 Streamer rotation 3 59 OGP P1 11 Geophysical position data exchange format user guide OGP Number Mode Details 2 Transition zone WGS 84 TM 132 SE EPSG 2310 Source receivers referenced to Mean Sea Level OBC receiver depths referenced to MSL depth EPSG 5
39. ED50 5 4326 WGS 84 UKOOA CO HC 1 8 2 Transformation Method 1 9606 Position Vector transformation geog2D domain 1 7 HC 1 8 4 X axis translation 1 8605 89 5 1 metre 1 HC 1 8 4 Y axis translation 1 8606 93 8 1 metre 1 HC 1 8 4 Z axis translation 1 8607 123 1 1 metre 1 HC 1 8 4 X axis rotation 1 8608 0 5 arc second 1 HC 1 8 4 Y axis rotation 1 8609 0 5 arc second 1 HC 1 8 4 Z axis rotation 1 8610 0 156 5 arc second 1 HC 1 8 4 Scale difference 1 8611 1 2 6 parts per million 1 HC 1 8 0 Transformation Number EPSG Code Name 2 15593 geographic3D to geographic2D HC 1 8 1 Source CRS Target CRS Version 2 6 4979 WGS 84 5 4326 WGS 84 HC 1 8 2 Transformation Method 2 9659 Geographic3D to 2D conversion 1 0 HC 1 9 0 Example Point Conversion 1 6 52 8000000 3 00000000 0 0 1 500091 87 5850233 06 2 52 80078563 3 00136267 5 52 8000000 3 00000000 OGP 44 International Association of Oil amp Gas Producers Number Example Details 2 Projected including Compound CRS Transverse Mercator US survey feet NADCON transformation NAD27 BLM zone 16N ftUS urn ogc def crs EPSG 32066 reduced depths referred to MSL urn ogc def crs EPSG 5715 coordinate transformation NADCON Conus urn ogc def coordinateOperation EPSG 1241 HC 1 0 0 Reference Systems Summary 5 0 7 3 HC 1 1 0 Unit of Measure 1 metre length 2 metre 9001 EPSG Dataset 7 6 9001 HC 1 1 0 Unit of Measure 2 radian angle 2 radi
40. EPSG 7 6 9110 For values given in degrees multiple unit definitions may be required if values are given in different representations Those most frequently encountered are a Decimal degrees EPSG unit code 9122 for example 34 44834444 This is the required representation for latitude and longitude positions in data records Southern hemisphere latitude and western hemisphere longitude will be preceded by a negative sign Where equivalence is required to a map grid position of centimetric precision it is recommended that latitude and longitude coordinates are written to 8 decimal places b Sexagesimal degrees EPSG unit code 9108 for example DDD MM SS SSS H is not allowed for data records but may be used for header records expected to be visually inspected c Sexagesimal DMS EPSG unit code 9110 for example 34 265404 This pseudo unit is used in the EPSG Dataset for storing CRS definition parameter values given in sexagesimal degrees degrees minutes and seconds as a single floating point number It is only for use in CRS definition records and not allowed in any other record type Other degree representations as defined through EPSG unit codes 9107 and 9115 through 9120 may be used if the source uses them Further examples of the implementation of record HC 1 1 0 are provided in Section 5 1 of the P1 11 Format Description Record HC 1 1 1 is used to provide examples of unit conversions HC 1 1 1 Example Unit Conversi
41. HC 1 1 0 Unit of Measure 5 US survey foot length 2 1 0 12 39 37 0 US survey foot 9003 EPSG Dataset 7 6 9003 HC 1 1 0 Unit of Measure 6 sexagesimal DMS angle 29 3 0 0 0 0 sexagesimal DMS 9110 EPSG Dataset 7 6 9110 HC 1 1 1 Example Unit Conversion 1 1 1 5 3 280833333 HC 1 1 1 Example Unit Conversion 2 2 1 3 57 295779513 HC 1 3 0 CRS Number EPSG Code Name Source 1 26782 NAD27 Louisiana South 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4267 NAD27 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 3 4326 WGS 84 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 4 4979 WGS 84 7 6 2010 11 02 EPSG HC 1 4 0 CRS Number EPSG Code Type Name 1 26782 1 projected NAD27 Louisiana South HC 1 4 3 Base Geographic CRS 1 2 4267 HC 1 4 4 Geodetic Datum 1 6267 North American Datum 1927 HC 1 4 5 Prime Meridian 1 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 1 7008 Clarke 1866 6378206 4 1 metre 294 9787 HC 1 5 0 Projection 1 11702 Louisiana CS27 South zone HC 1 5 1 Projection Method 1 9802 Lambert Conic Conformal 2SP 6 HC 1 5 2 Latitude of false origin 1 8821 28 4 6 sexagesimal DMS HC 1 5 2 Longitude of false origin 1 8822 91 2 6 sexagesimal DMS HC 1 5 2 Latitude of 1st standard parallel 1 8823 29 18 6 sexagesimal DMS HC 1 5 2 Latitude of 2nd standard parallel 1 8824 30 42 6 sexagesimal DMS HC 1 5 2 Easting at false origin 1 8826 2000000 5 US survey foot HC 1 5 2 Northing at false origin
42. NAD27 Louisiana South HC 1 4 0 CRS Number EPSG Code Type Name 12 4267 2 geographic 2D NAD27 HC 1 4 0 CRS Number EPSG Code Type Name 13 27572 1 projected NTF Paris Lambert zone II HC 1 4 0 CRS Number EPSG Code Type Name 14 4807 2 geographic 2D NTF Paris Where examples below further expound the CRSs listed above the CRSREF number is written in green font HC 1 4 1 Compound CRS Horizontal CRS Identification Compound CRS Only The horizontal CRS of a Compound CRS may be a projected or geographic 2D CRS An example of each type would appear in record HC 1 4 1 as follows HC 1 4 1 Compound Horizontal CRS 7 9 NAD83 HC 1 4 1 Compound Horizontal CRS 8 1 WGS 84 UTM zone 31N HC 1 4 2 Compound CRS Vertical CRS Identification Compound CRS Only The vertical CRS details of a compound CRS would appear in record HC 1 4 2 as follows HC 1 4 2 Compound Vertical CRS 7 10 NAVD88 height HC 1 4 2 Compound Vertical CRS 8 5 MSL depth HC 1 4 3 Base Geographic CRS Details Projected CRS Only The record defining the base geographic CRS of the projected CRSs would appear in HC 1 4 3 as follows HC 1 4 3 Base Geographic CRS 1 2 4326 HC 1 4 3 Base Geographic CRS 11 12 4267 HC 1 4 3 Base Geographic C
43. North American Datum 1927 HC 1 4 5 Prime Meridian 2 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 2 7008 Clarke 1866 6378206 4 1 metre 294 9786982 HC 1 6 0 Coordinate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 3 5714 5 Vertical Mean Sea Level Height HC 1 4 7 Vertical Datum 3 5100 Mean Sea Level HC 1 6 0 Coordinate System 3 6497 Vertical CS 5 vertical 1 HC 1 6 1 Coordinate System Axis 1 3 1 112 Gravity related height up H 5 US Survey Foot HC 1 4 0 CRS Number EPSG Code Type Name 4 7 Compound NAD27 Pennsylvania South Elevation Above Sea Level HC 1 4 1 Comppound Horizontal CRS 4 1 NAD 27 Pennsylvania South HC 1 4 2 Compound Vertical CRS 4 3 Elevation Above Mean Sea Level HC 1 4 0 CRS Number EPSG Code Type Name 5 4326 2 Geographic 2D WGS84 HC 1 4 4 Geodetic Datum 5 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 5 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 5 7030 WGS84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 5 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 5 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 5 2 107 Geodetic longitude east Long 3 degree HC 1 7 0 Transformation Number EPSG Code Name Sou
44. OGP 90 International Association of Oil amp Gas Producers S1 0 101 1766 1 2011 085 09 14 13 0 18 A6 2 164546 7 2449280 3 60 69101608 151 87182573 60 69044646 151 87408386 41 7 CC 1 0 0 Beginning of Land Receiver Data no times R1 0 111 1001 1 2 G1 3 1 142195 5 2508346 4 707 6 60 85070423 152 00652816 60 85013920 152 00877110 R1 0 111 1003 1 2 G1 3 1 142253 5 2508192 2 690 2 60 85028750 152 00617670 60 84972247 152 00841972 R1 0 111 1005 1 2 G1 3 1 142312 5 2508038 7 682 2 60 84987277 152 00581977 60 84930774 152 00806286 R1 0 111 1007 1 2 G1 3 1 142371 6 2507883 7 662 1 60 84945394 152 00546202 60 84888892 152 00770520 R1 0 111 1009 1 2 G1 3 1 142430 9 2507729 9 650 4 60 84903841 152 00510338 60 84847340 152 00734663 R1 0 111 1011 1 2 G1 3 1 142489 4 2507576 1 638 0 60 84862282 152 00474922 60 84805780 152 00699255 R1 0 111 1013 1 2 G1 3 1 142548 6 2507421 5 613 4 60 84820509 152 00439102 60 84764008 152 00663442 R1 0 111 1015 1 2 G1 3 1 142607 8 2507267 7 605 7 60 84778955 152 00403296 60 84722454 152 00627644 R1 0 111 1017 1 2 G1 3 1 142667 3 2507113 3 587 5 60 84737240 152 00367313 60 84680739 152 00591668 R1 0 111 1019 1 2 G1 3 1 142725 5 2506959 8 579 6 60 84695759 152 00332074 60 84639258 152 00556437 R1 0 111 1021 1 2 G1 3 1 142784 7 2506805 8 575 4 60 8465415
45. Position Record Quality Definition 2 0 No Quality Data Recorded 0 CC 1 0 0 H1 2 0 0 for Land Receiver Positions H1 2 0 0 Receiver Record Type Definition 3 1 5 2 6 1 1 0 H1 2 0 1 Receiver Record Quality Definition 3 0 No Quality Data Recorded 0 CC 1 0 0 H1 2 0 0 for Marine Receiver Positions with water depth and tidal elevation at time of recording H1 2 0 0 Receiver Record Type Definition 4 1 1 2 6 1 1 1 2 1 4 Water Depth 5 2 4 amp 7 Vertical Datum Difference 5 H1 2 0 1 Receiver Record Quality Definition 4 0 No Quality Data Recorded 0 H1 3 0 0 Relation Record Definition 0 CC 1 0 0 Beginning of Land Shots S1 0 104 1136 1 2011 077 14 13 52 0 7 E2 1 146155 2 2497892 5 25 1 60 82245248 151 98256747 60 82188715 151 98481506 38 25 S1 0 106 1136 1 2011 077 14 19 14 0 9 E4 1 146183 3 2497903 5 25 3 60 82248488 151 98241200 60 82191955 151 98465960 51 35 S1 0 104 1320 1 2011 077 15 24 01 0 7 E2 1 151581 4 2483715 8 24 0 60 78413711 151 94982673 60 78357089 151 95208024 13 25 S1 0 107 1331 1 2011 077 15 34 11 0 10 E5 1 151947 4 2482884 0 23 2 60 78189261 151 94764185 60 78132633 151 94989570 18 45 S1 0 109 1331 1 2011 084 15 25 30 0 12 E7 1 151975 5 2482894 9 23 2 60 78192469 151 94748652 60 78135842 151 94974038 19 25 S1 0 110 1331 1 2011 084 15 29 48 0 13 E8 1 151989 8 2482900 3 23 2 60 78194061 151 94740745 60 78137434 151 94966131 19 35 S1 0 109 1336 1 2011
46. WGS 84 HC 1 8 2 Transformation Method 2 9659 Geographic3D to 2D conversion 1 0 HC 1 8 0 Transformation Number EPSG Code Name 3 10084 WGS 84 to EGM96 Geoid height 1 1 HC 1 8 1 Source CRS Target CRS Version 3 6 4979 WGS 84 3 5773 EGM96 geoid height NGA World HC 1 8 2 Transformation Method 3 9661 Geographic3D to GravityRelatedHeight EGM 0 1 HC 1 8 3 Geoid height correction model file 3 8666 WW15MGH GRD 1 HC 1 9 0 Example Point Conversion 1 6 29 00000000 12 00000000 100 0 4 792352 67 3211891 14 70 92 63 OGP P1 11 Geophysical position data exchange format user guide OGP Appendix D P1 11 Format Data Record Examples Number Mode Details 1 Marine Marine Towed Streamer 3D Source Position Records This example shows source and float positions in 3 CRSs with positional quality estimates S1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 G2 1 391297 22 4092985 73 36 91761093 16 29212461 36 97417522 16 22215758 2 2 1 2 234 2 1 2 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 2 G1 1 391341 12 4092961 71 36 97258981 16 22807496 36 97451410 16 22202793 2 4 1 2 134 2 1 1 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 G2 1 391297 20 4092985 78 36 97631093 16 22172461 36 97471522 16 22257528 2 2 1 2 234 2 1 0 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 25 T1 1 388911 73 4087063 99 36 92244626 16 24718704 36 92110146 16 24849295 3 1 1 2 154 2 1 3 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 26 T2 1
47. X width Y G1 6 60Ft 0Ft H603Unit spacing X Y G1 12Ft 0Ft H604Spare H605Spare H606Spare H607Spare H608Spare H609Spare H26 Fairfield Z Land Node Line 102 H630Type model polarity G4 G_LAND GS 30CT SEG H631Damp coeff natural freq G4 0 67 10Hz H632Nunits len X width Y G4 1 0Ft 0Ft H633Unit spacing X Y G4 0Ft 0Ft H634Spare H635Spare H636Spare H637Spare H638Spare 75 OGP P1 11 Geophysical position data exchange format user guide OGP H639Spare H26 Cable Recording Line 111 Sercel 408ULS Multi Component Hydrophone Geophone H640Type model polarity R1 MULTI 408ULS SEG H641Damp coeff natural freq R1 0 67 10Hz H642Nunits len X width Y R1 1 1Ft 1Ft H643Unit spacing X Y R1 1Ft 1Ft H644Spare H645Spare H646Spare H647Spare H648Spare H649Spare H26 Fairfield Z 700 Marine Node Line 102 H26 3 Geophones Hytec Omni directional 15hz H26 1 Hydrophone Hytec 10hz H650Type model polarity R2 MULTI Z 700 SEG H651Damp coeff natural freq R2 0 67 NA H652Nunits len X width Y R2 1 1Ft 1Ft H653Unit spacing X Y R2 1Ft 1Ft H654Spare H655Spare H656Spare H657Spare H658Spare H659Spare H700Type model polarity E1 Explosive OSX 8Z SEG H701Size vert stk fold E1 1 1Lb 1 H702Nunits len X width Y E1 10 40Ft 10Ft H703Unit spacing X Y E1 10Ft 10Ft H711Nom shot depth charge len E1 8Ft 1Ft H712Nom soil drill method H713Weathering thickness H714Spare H715Spare H720Type model polarity E2 Explosive OSX 8Z SEG H721Size
48. and 111 1705 was disabled for FFID 0728 0764 CC 1 0 0 The marine portion of receiver line 111 111 1631 and higher was relaid between FFID 0765 0769 CC 1 0 0 The initial receiver layout is index 1 CC 1 0 0 After the cable relay the receiver index is 2 For simplicity the land receiver CC 1 0 0 positions have been repeated with receiver index 2 even though their position did not move CC 1 0 0 CC 1 0 0 Marine Point depth column Source height of water above the energy source at the time of the shot CC 1 0 0 Marine Water depth column Source height of water surface above seafloor at the time of the shot CC 1 0 0 Receiver height of water surface above seafloor at the time of the receiver lay CC 1 0 0 Nikisi Alaska H1 0 0 0 File Contents Description Post Processed Land and Marine Data Converted from several SPS v1 0 files H1 0 1 0 Processing Details Converted from SPS V1 0 files CC 1 0 0 H1 1 0 0 for Land Explosive Data with uphole time and charge depth below topographic surface H1 1 0 0 Position Record Type Definition 1 5 2 6 1 1 2 6 Uphole Time 8 9 Charge Depth 5 89 OGP P1 11 Geophysical position data exchange format user guide OGP H1 1 0 1 Position Record Quality Definition 1 0 No Quality Data Recorded 0 CC 1 0 0 H1 1 0 0 for Marine Air Gun Data with water depth and source point depth at time of recording H1 1 0 0 Position Record Type Definition 2 1 2 6 1 1 2 1 4 Water Depth 5 3 4 Point Depth 5 H1 1 0 1
49. changed for the reverse direction These reversibility data are attributes of the coordinate operation method They are included in the definitions of methods supported by the EPSG Dataset Map projection method formulae of relevance to the oil and gas industry are always documented for both forward and reverse calculations with the formulae structured such that the map projection parameter values can be used for both forward and reverse calculations As such the reversibility of the method itself and of signs of parameter values do not need documenting in map projection definitions including user defined map projections Coordinate Operation Accuracy In addition to whether or not a change of datum is involved coordinate conversions and coordinate transformations differ in another important aspect Transformation parameters are empirically determined and thus subject to measurement error The consequence of this is that by applying a coordinate transformation to a set of coordinates any error in the transformation will be inherited by the output coordinates The transformation accuracy is the error in position that is introduced in a set of coordinates considered to be errorless through the application of the coordinate transformation Whenever known this should be documented as it adds to the error budget of positions Field 9 in HC 1 8 0 is provided for this purpose The transformation description allows for a single generic value that i
50. either have no parameters or have defined i e precise parameter values coordinate dataset see coordinate set coordinate operation ISO TC211 change of coordinates based on a one to one relationship from one CRS to another Note See also coordinate transformation and coordinate conversion coordinate reference system ISO TC211 coordinate system that is related to an object by a datum Note 1 For geodetic datum and vertical datum the object will be the Earth Note 2 Coordinate reference system is normally abbreviated to CRS Note 3 Types of CRS distinguished in ISO 19111 are geodetic CRS projected CRS vertical CRS and engineering CRS In the EPSG Dataset geodetic CRS is sub divided into geocentric CRS geographic 3D CRS and geographic 2D CRS coordinate set ISO TC211 collection of coordinate tuples related to the same coordinate reference system Note Identical to coordinate dataset coordinate system ISO TC211 set of mathematical rules for specifying how coordinates are to be assigned to points Note The coordinate system defines what type of quantities the coordinates are and provides an implied reference to the manner in which geometrical quantities such as angles and distances are derived from coordinate values The coordinate system does this by describing the coordinate axes and their relationships This is expressed in the type of coordinate system ellipsoidal 2D amp 3D Cartesian 2D amp 3D
51. equivalence to tests specified in the GIGS Test Dataset 96 International Association of Oil amp Gas Producers OGP term definition compound CRS ISO TC211 Coordinate Reference System using at least two independent Coordinate Reference Systems Note In the context of GIGS a compound CRS is always union of a geographic 2D CRS or a projected CRS or a horizontal engineering CRS with a vertical CRS A 2D horizontal engineering CRS combined with a 1D vertical engineering CRS is not a compound CRS but an engineering 3D CRS concatenated coordinate operation ISO TC211 coordinate operation consisting of sequential application of multiple coordinate operations Note Usually a concatenated coordinate operation consists of a sequence of coordinate transformations i e no coordinate conversions in included in that sequence For that reason is has become customary to speak of a concatenated coordinate transformation concatenated coordinate transformation GIGS concatenated coordinate operation consisting of sequential application of multiple coordinate transformations conversion see coordinate conversion coordinate ISO TC211 one of a sequence of n scalar numbers designating the position of a point in n dimensional space coordinate conversion ISO TC211 coordinate operation in which the two coordinate reference systems are based on the same datum Example A map projection Note Coordinate conversions
52. establish a structured set of standards for information concerning objects or phenomena that are directly or indirectly associated with a location relative to the Earth Note See www isotc211 org JIP OGP Joint Industry Project a commonly used term to describe a project which is jointly funded by a number of companies who share a specific technical problem and wish to propose industry wide solutions for the betterment of all parties latitude See geodetic latitude late binding GIGS Association at run time of a coordinate transformation with a CRS Note Late binding allows the user to select the appropriate transformation upon import of geospatial data or merge of two geospatial datasets This means that in cases where there are multiple existing transformations the user can choose the appropriate one possibly aided by additional information local north OGP Arbitrarily chosen reference direction for azimuths for local usage Note Use of local north is not always associated with an Engineering CRS Example The angle between rig north may be defined along the axis of a rig regardless of its relationship to earth orientation longitude See geodetic longitude magnetic north OGP direction of the projection of magnetic field lines to the horizontal plane pointing approximately towards the earth s magnetic north pole map grid OGP the realisation of a projected CRS map projection ISO TC211
53. in the Pattern 10 11 0 5 US Survey Foot HC 2 3 1 Nominal Shot Depth 10 22 45 5 US Survey Foot HC 2 3 1 Length of Charge 10 23 4 5 US Survey Foot HC 2 3 0 Orica Seismic Explosive Range Osx 11 E6 7 Explosive Osx 8 Z HC 2 3 1 Polarity 11 1 SEG HC 2 3 1 Total Charge Size 11 2 8 8 21 pounds mass HC 2 3 1 Vertical Fold of Stack 11 5 1 HC 2 3 1 Number of Elements in Pattern 11 7 1 HC 2 3 1 Inline Dimension of Pattern 11 8 0 5 US Survey Foot HC 2 3 1 Crossline Dimension of Pattern 11 9 0 5 US Survey Foot HC 2 3 1 Inline Distance Between Elements in the Pattern 11 10 0 5 US Survey Foot HC 2 3 1 Crossline Distance Between Elements in the Pattern 11 11 0 5 US Survey Foot HC 2 3 1 Nominal Shot Depth 11 22 100 5 US Survey Foot HC 2 3 1 Length of Charge 11 23 4 5 US Survey Foot HC 2 3 0 Orica Seismic Explosive Range Osx 12 E7 7 Explosive Osx 8 Z HC 2 3 1 Polarity 12 1 SEG HC 2 3 1 Total Charge Size 12 2 4 4 21 pounds mass HC 2 3 1 Vertical Fold of Stack 12 5 1 HC 2 3 1 Number of Elements in Pattern 12 7 1 HC 2 3 1 Inline Dimension of Pattern 12 8 0 5 US Survey Foot HC 2 3 1 Crossline Dimension of Pattern 12 9 0 5 US Survey Foot HC 2 3 1 Inline Distance Between Elements in the Pattern 12 10 0 5 US Survey Foot 87 OGP P1 11 Geophysical position data exchange format user guide OGP HC 2 3 1 Crossline Dist
54. is a constant for a survey expressed in the units of the referenced vertical CRS The parameter in the second sub field of the extension definition is the CRSREF of the referenced Vertical CRS The sign of the offset is determined by the vertical axis orientation definition of the referenced Vertical CRS in HC 1 6 1 So if MSL height is the referenced vertical CRS a seismic datum offset of ve 100m places the seismic datum surface below MSL Charge Depth record extension identifier 9 For measured heights above or depths below a variable or irregular surface such as land topographic surface or seabed which in a CRS sense cannot be used as a reference surface a CRSREF reference cannot be given The Water Depth and Point Depth extension types then cannot be used To add the charge depth to a source record the pre defined Charge Depth extension definition should be provided in H1 1 0 0 for this the second sub field of the extension definition should be unpopulated but the record commented appropriately Table 3 Vertical measurements in record extension fields A header record that defines a position record type P1TYPEREF for a dynamite charge would be suitably commented as follows CC 1 0 0 Position record type for dynamite charge with record extension field for charge depth below topographic surface H1 1 0 0 Position Record Type Definition 1 1 2 3 1 1 1 9 Charge Depth 1 Any correction used to convert between vertical datum
55. is known The same coordinate values can represent different locations Conversely to describe location unambiguously a coordinate tuple must be associated with a reference system definition Only then will the coordinate tuple describe a location unambiguously A coordinate set is a collection of coordinate tuples All coordinate tuples within a coordinate set should be referenced to the same coordinate reference system For a coordinate set one CRS identification or definition is associated with the coordinate set All coordinate tuples in that coordinate set inherit the CRS association 10 International Association of Oil amp Gas Producers OGP The P format CRS records draw heavily on the EPSG Geodetic Parameter Dataset referred to in short as the EPSG Dataset This in turn is based on ISO 19111 Spatial referencing by coordinates To populate these CRS records successfully a working understanding of the data model underpinning the CRS data is desirable This is documented in OGP Geodesy Subcommittee Guidance Note 7 part 1 Using the EPSG Geodetic Parameter Dataset The concepts are described in textbooks such as Iliffe and Lott see reference in Bibliography In summary Coordinates describe position in a coordinate system A coordinate system is a mathematical abstraction with no real world meaning To give real world meaning coordinate systems are related in position and orientation to an object usua
56. reserved characters amp is not allowed in a comment record See Section 7 of the P1 11 Format Description for a definition of the required comment record format 26 International Association of Oil amp Gas Producers OGP 6 P1 Format specific Header The Common Header is followed by a P1 specific header see Section 9 of the P1 11 Format Description denoted by the prefix H1 This contains basic information about the position records such as contents and processing descriptions entered as free text and attribute information stored with the position records See Table 16 in the P1 11 Format Description It also contains key metadata about the position records themselves and their geodetic identity 6 1 P1 Header Position Record Definitions The P1 11 format defines the following five position record types S1 for a fired energy source position R1 for a single receiver position P1 for any other positioning object N1 for preplot positions M1 for survey perimeter positions Each of these position records is linked to a position record type defined in the file header in which the coordinate and time reference systems written into all position records in the file and the number and description of record extension fields for the record are identified For S1 this is defined at H1 1 0 0 For R1 at H1 2 0 0 For P1
57. surfaces can be logged in a record extension field As shown in Table 3 the P1 11 format reserves an extension identifier 2 for Vertical CRS Difference For example the surface elevation required to be recorded for OBC work is the difference between Sea Level EPSG 5113 and MSL EPSG 5100 vertical datums where the difference is from Sea Level to Mean Sea Level positive when Sea Level is above MSL both CRSs having positive down vertical axes The vertical datums must be listed in the From gt To order in the second sub field of the record extension block The following H1 1 0 0 header record describes the construction required to add 3 additional vertical measurements to a position record namely water depth tidal elevation and point depth H1 1 0 0 Position Record Type Definition 1 1 2 3 1 1 3 1 5 Water Depth 1 2 5 amp 4 Vertical CRS Difference 1 3 5 Point Depth 1 The first field extension block 1 5 Water Depth 1 is instantaneous water depth where CRSREF 5 is Instantaneous Water Level depth The second field extension block 2 5 amp 4 Vertical CRS Difference 1 is the offset from sea level CRSREF 5 to MSL CRSREF 4 i e the tidal height The third field extension block 3 5 Point Depth 1 is the depth of the position object below instantaneous sea level The Vertical CRS Difference field extension could also be used in non tidal waters for example in the Caspian Sea where there is a seasonal variation in th
58. the information contained in this publication neither the oGP nor any of its members past present or future warrants its accuracy or will regardless of its or their negligence assume liability for any foreseeable or unforeseeable use made thereof which liability is hereby excluded Consequently such use is at the recipient s own risk on the basis that any use by the recipient constitutes agreement to the terms of this disclaimer The recipient is obliged to inform any subsequent recipient of such terms This document may provide guidance supplemental to the requirements of local legislation Nothing herein however is intended to replace amend supersede or otherwise depart from such requirements In the event of any conflict or contradiction between the provisions of this document and local legislation applicable laws shall prevail Copyright notice The contents of these pages are The International Association of Oil amp Gas Producers Permission is given to reproduce this report in whole or in part provided i that the copyright of oGP and ii the source are acknowledged All other rights are reserved Any other use requires the prior written permission of the oGP These Terms and Conditions shall be governed by and construed in accordance with the laws of England and Wales Disputes arising here from shall be exclusively subject to the jurisdiction of the courts of England and Wales iii OGP P1 11 Geophysical position dat
59. transformation internal file reference number COTRANSREF and if this designation follows a chronological sequence this block of records is representative of the derivation of the data If an EPSG code is given for the coordinate transformation field 7 the corresponding EPSG transformation name should be used in HC 1 7 0 and HC 1 8 0 The third transformation listed below is not available in the EPSG Geodetic Parameter Dataset at time of writing It has however been named in field 8 in accordance with the EPSG naming convention by quoting the direction from local to reference CRS For consistency it is strongly recommended that this practice is followed whenever naming a coordinate transformation that is not in the EPSG Dataset The implicit identification of 3 coordinate transformations would appear in the P1 11 Common Header as follows HC 1 7 0 Transformation Number EPSG Code Name Source 1 15593 geog3D to geog2D 7 4 1 2010 02 01 EPSG HC 1 7 0 Transformation Number EPSG Code Name Source 2 1613 ED50 to WGS 84 24 7 4 1 2010 02 01 EPSG HC 1 7 0 Transformation Number EPSG Code Name Source 3 ED50 to WGS 84 JGI 21 OGP P1 11 Geophysical position data exchange format user guide OGP HC 1 8 0 Coordinate Transformation Name Common Header record HC 1 8 0 is the first record in the block containing each coordinate transformation explicit definition grouped together here only for demonstration purp
60. vert stk fold E2 4 4Lb 1 H722Nunits len X width Y E2 1 0Ft 0Ft H723Unit spacing X Y E2 0Ft 0Ft H731Nom shot depth charge len E2 25Ft 2Ft H732Nom soil drill method H733Weathering thickness OGP 76 International Association of Oil amp Gas Producers H734Spare H735Spare H740Type model polarity E3 Explosive OSX 8Z SEG H741Size vert stk fold E3 4 4Lb 1 H742Nunits len X width Y E3 1 0Ft 0Ft H743Unit spacing X Y E3 0Ft 0Ft H751Nom shot depth charge len E3 35Ft 2Ft H752Nom soil drill method H753Weathering thickness H754Spare H755Spare H760Type model polarity E4 Explosive OSX 8Z SEG H761Size vert stk fold E4 8 8Lb 1 H762Nunits len X width Y E4 1 0Ft 0Ft H763Unit spacing X Y E4 0Ft 0Ft H771Nom shot depth charge len E4 35Ft 4Ft H772Nom soil drill method H773Weathering thickness H774Spare H775Spare H780Type model polarity E5 Explosive OSX 8Z SEG H781Size vert stk fold E5 8 8Lb 1 H782Nunits len X width Y E5 1 0Ft 0Ft H783Unit spacing X Y E5 0Ft 0Ft H791Nom shot depth charge len E5 45Ft 4Ft H792Nom soil drill method H793Weathering thickness H794Spare H795Spare H800Type model polarity E6 Explosive OSX 8Z SEG H801Size vert stk fold E6 8 8Lb 1 H802Nunits len X width Y E6 1 0Ft 0Ft H803Unit spacing X Y E6 0Ft 0Ft H811Nom shot depth charge len E6 100Ft 4Ft H812Nom soil drill method H813Weathering thickness H814Spare H815Spare H820Type model polarity E7 Explosive OSX 8Z SEG H821Size v
61. vertical Coordinate system also requires specification of the axes names their orientation and unit of measure and their order Coordinates in a coordinate tuple must be provided in the same order as the axes as specified in the associated coordinate system coordinate transformation ISO TC211 coordinate operation in which the two coordinate reference systems are based on different datums Note 1 A change of coordinates referenced to one CRS to become referenced to another CRS and comprising a different datum Note 2 Coordinate transformations are known under a variety of alternative names in the E amp P industry e g datum transformation datum shift datum conversion geo transform etc coordinate tuple ISO TC211 tuple composed of a sequence of coordinates CRS see coordinate reference system 97 OGP P1 11 Geophysical position data exchange format user guide OGP term definition CSV A comma separated values or character separated values CSV file is a simple text format for a database table Each record in the table is one line of the text file Each field value of a record is separated from the next by a character typically a comma but some European countries use a semi colon as a value separator instead of a comma Implementations of CSV can often handle field values with embedded line breaks or separator characters by using quotation marks or escape sequences Note Definition from http en wiki
62. with the data records to enable proper definition and subsequent use of the data Because of the variation in use it is understood that some records defined as mandatory for the exchange of position data specifically new acquisition may not be available as information in part or whole for some legacy or other positional data types As an example the inclusion of positional accuracy estimates which are highly desirable for all forms of source and receiver locations may not exist for legacy data that was derived from the P1 90 format or digitized or scanned from hard copy documents What would be considered the minimum mandatory requirement for several differently sourced P1 11 files is given in the table in Appendix B in the P1 11 Format Description and in Appendix A in this User Guide The user is encouraged to attempt to provide as much detailed support information in the headers to quantify the source and level of confidence in the data being encoded The incorporation of comment records facilitates this Where possible examples are provided to demonstrate best practice in defining legacy data and methods 4 International Association of Oil amp Gas Producers OGP 1 2 General Format Information P files comprise a series of records containing positional information about a survey A record is a line of ASCII text terminated by a carriage return and or line feed character Each record contains a number of comma separated field
63. 0 5 US Survey Foot HC 2 3 1 Crossline Distance Between Elements in the Pattern 8 11 0 5 US Survey Foot HC 2 3 1 Nominal Shot Depth 8 22 35 5 US Survey Foot HC 2 3 1 Length of Charge 8 23 2 5 US Survey Foot HC 2 3 0 Orica Seismic Explosive Range Osx 9 E4 7 Explosive Osx 8 Z HC 2 3 1 Polarity 9 1 SEG HC 2 3 1 Total Charge Size 9 2 8 8 21 pounds mass HC 2 3 1 Vertical Fold of Stack 9 5 1 HC 2 3 1 Number of Elements in Pattern 9 7 1 HC 2 3 1 Inline Dimension of Pattern 9 8 0 5 US Survey Foot HC 2 3 1 Crossline Dimension of Pattern 9 9 0 5 US Survey Foot HC 2 3 1 Inline Distance Between Elements in the Pattern 9 10 0 5 US Survey Foot HC 2 3 1 Crossline Distance Between Elements in the Pattern 9 11 0 5 US Survey Foot HC 2 3 1 Nominal Shot Depth 9 22 35 5 US Survey Foot HC 2 3 1 Length of Charge 9 23 4 5 US Survey Foot HC 2 3 0 Orica Seismic Explosive Range Osx 10 E5 7 Explosive Osx 8 Z HC 2 3 1 Polarity 10 1 SEG HC 2 3 1 Total Charge Size 10 2 8 8 21 pounds mass HC 2 3 1 Vertical Fold of Stack 10 5 1 HC 2 3 1 Number of Elements in Pattern 10 7 1 HC 2 3 1 Inline Dimension of Pattern 10 8 0 5 US Survey Foot HC 2 3 1 Crossline Dimension of Pattern 10 9 0 5 US Survey Foot HC 2 3 1 Inline Distance Between Elements in the Pattern 10 10 0 5 US Survey Foot HC 2 3 1 Crossline Distance Between Elements
64. 0 152 00296268 60 84597650 152 00520639 R1 0 111 1023 1 2 G1 3 1 142843 0 2506651 2 574 4 60 84612370 152 00260956 60 84555869 152 00485335 R1 0 111 1025 1 2 G1 3 1 142902 6 2506497 5 571 8 60 84570846 152 00224933 60 84514346 152 00449319 R1 0 111 1027 1 2 G1 3 1 142961 6 2506342 9 556 2 60 84529071 152 00189231 60 84472571 152 00413624 R1 0 111 1029 1 2 G1 3 1 143020 4 2506188 8 549 3 60 84487431 152 00153651 60 84430931 152 00378052 R1 0 111 1031 1 2 G1 3 1 143078 9 2506035 5 538 7 60 84446007 152 00118253 60 84389507 152 00342662 R1 0 111 1033 1 2 G1 3 1 143138 7 2505880 2 526 6 60 84404047 152 00082094 60 84347547 152 00306510 R1 0 111 1035 1 2 G1 3 1 143197 3 2505726 8 521 6 60 84362596 152 00046640 60 84306097 152 00271064 R1 0 111 1037 1 2 G1 3 1 143256 2 2505572 2 515 2 60 84320820 152 00010999 60 84264321 152 00235430 R1 0 111 1039 1 2 G1 3 1 143315 4 2505418 8 508 3 60 84279374 151 99975212 60 84222875 152 00199650 CC 1 0 0 Beginning of Marine Receiver Data R1 0 111 1719 1 2011 084 10 55 20 0 4 R1 4 1 163434 5 2453047 7 60 70123028 151 87862880 60 70066116 151 88088741 19 0 13 3 R1 0 111 1721 1 2011 084 10 54 34 0 4 R1 4 1 163502 4 2452899 8 60 70083119 151 87822644 60 70026205 151 88048505 23 0 16 9 R1 0 111 1723 1 2011 084 10 53 55 0 4 R1 4 1 163560 2 2452
65. 0 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 6 6423 Ellipsoidal 3D CS 3 ellipsoidal 3 HC 1 6 1 Coordinate System Axis 1 6 1 108 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 6 2 109 Geodetic longitude east Long 3 degree HC 1 6 1 Coordinate System Axis 3 6 3 110 Ellipsoidal height up h 1 metre HC 1 7 0 Transformation Number EPSG Code Name Source 1 1863 ELD79 to WGS 84 5 7 6 2010 11 02 EPSG HC 1 7 0 Transformation Number EPSG Code Name Source 2 15593 geographic3D to geographic2D 7 6 2010 11 02 EPSG HC 1 7 0 Transformation Number EPSG Code Name Source 3 10084 WGS 84 to EGM96 Geoid height 1 7 6 2010 11 02 EPSG HC 1 8 0 Transformation Number EPSG Code Name 1 1863 ELD79 to WGS 84 5 6 HC 1 8 1 Source CRS Target CRS Version 1 2 4159 ELD79 5 4326 WGS 84 GMRA Lby HC 1 8 2 Transformation Method 1 9607 Coordinate Frame Rotation geog2D domain 1 7 HC 1 8 4 X axis translation 1 8605 389 691 1 metre 1 HC 1 8 4 Y axis translation 1 8606 64 502 1 metre 1 HC 1 8 4 Z axis translation 1 8607 210 209 1 metre 1 HC 1 8 4 X axis rotation 1 8608 0 086 5 arc second 1 HC 1 8 4 Y axis rotation 1 8609 14 314 5 arc second 1 HC 1 8 4 Z axis rotation 1 8610 6 39 5 arc second 1 HC 1 8 4 Scale difference 1 8611 0 9264 6 parts per million 1 HC 1 8 0 Transformation Number EPSG Code Name 2 15593 geographic3D to geographic2D HC 1 8 1 Source CRS Target CRS Version 2 6 4979 WGS 84 5 4326
66. 0 0 degree 9102 EPSG Dataset 7 6 9102 HC 1 1 0 Unit of Measure 4 unity scale 2 unity 9201 EPSG Dataset 7 6 9201 HC 1 1 0 Unit of Measure 5 second time 12 second POSC UOM Dictionary 2 2 s HC 1 1 1 Example Unit Conversion 1 2 1 3 57 295779513 HC 1 2 0 Time Reference System 1 1 0 UTC 0 5 HC 1 3 0 CRS Number EPSG Code Name Source 1 32628 WGS 84 UTM zone 28N 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4326 WGS 84 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 3 5715 MSL depth 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 4 WGS 84 UTM zone 28N MSL depth HC 1 3 0 CRS Number EPSG Code Name Source 5 SL depth 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 6 WGS 84 UTM zone 28N SL depth HC 1 3 0 CRS Number EPSG Code Name Source 7 4979 WGS 84 7 6 2010 11 02 EPSG HC 1 4 0 CRS Number EPSG Code Type Name 1 32628 1 projected WGS 84 UTM zone 28N HC 1 4 3 Base Geographic CRS 1 2 4326 HC 1 4 4 Geodetic Datum 1 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 1 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 1 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 5 0 Projection 1 16028 UTM zone 28N HC 1 5 1 Projection Method 1 9807 Transverse Mercator 5 HC 1 5 2 Latitude of natural origin 1 8801 0 3 degree HC 1 5 2 Longitude of natural origin 1 8802 15 3 degree HC 1 5 2 Scale factor at natural origin 1 8805 0 99
67. 0 246 14 56 23 0 3 amp 11 G2 amp S8 1 391130 70 4092901 70 36 97593410 16 22316827 36 97593410 16 22316827 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 12 G2 amp S9 1 391087 00 4092926 10 36 97614894 16 22366266 36 97614894 16 22366266 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 13 G2 amp S10 1 391043 40 4092950 60 36 97636469 16 22415595 36 97636469 16 22415595 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 25 T1 1 388911 70 4087063 90 36 92306227 16 24723566 36 92306227 16 24723566 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 26 T2 1 388824 20 4087112 40 36 92348905 16 24822497 36 92348905 16 24822497 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 27 T3 1 388737 20 4087161 90 36 92392490 16 24920883 36 92392490 16 24920883 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 28 T4 1 388650 20 4087211 20 36 92435894 16 25019267 36 92435894 16 25019267 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 29 T5 1 388562 60 4087259 50 36 92478388 16 25118311 36 92478388 16 25118311 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 30 T6 1 388475 30 4087308 10 36 92521155 16 25217024 36 92521155 16 25217024 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 31 T7 1 388387 10 4087355 30 36 92562650 16 25316727 36 92562650 16 25316727 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 32 T8 1 388300 60 4087405 60 36 92606957 16 25414569 36 92606957 16 25414569
68. 000 19 pounds square inch HC 2 3 1 Number of Sub Arrays 16 30 2 HC 2 3 1 Nominal Towing Depth 16 31 3 0 1 metre HC 2 3 0 Input Output Air Gun Array 304 17 A4 4 Air Gun Sleeve Gun Model II HC 2 3 1 Polarity 17 1 SEG HC 2 3 1 Air Volume 17 4 880 15 cubic inch HC 2 3 1 Vertical Fold of Stack 17 5 1 HC 2 3 1 Number of Elements in Pattern 17 7 8 OGP 88 International Association of Oil amp Gas Producers HC 2 3 1 Inline Dimension of the Pattern 17 8 0 0 1 metre HC 2 3 1 Crossline Dimension of the Pattern 17 9 0 0 1 metre HC 2 3 1 Inline Distance Between Elements in the Pattern 17 7 0 1 metre HC 2 3 1 Crossline Distance Between Elements in the Pattern 17 8 0 1 metre HC 2 3 1 Nominal Air Pressure 17 29 2000 19 pounds square inch HC 2 3 1 Number of Sub Arrays 17 30 1 HC 2 3 1 Nominal Towing Depth 17 31 3 0 1 metre HC 2 3 0 Input Output Air Gun Array 304 18 A6 4 Air Gun Sleeve Gun Model II HC 2 3 1 Polarity 18 1 SEG HC 2 3 1 Air Volume 18 4 10 15 cubic inch HC 2 3 1 Vertical Fold of Stack 18 5 1 HC 2 3 1 Number of Elements in Pattern 18 7 1 HC 2 3 1 Inline Dimension of the Pattern 18 8 0 0 1 metre HC 2 3 1 Crossline Dimension of the Pattern 18 9 0 0 1 metre HC 2 3 1 Inline Distance Between Elements in the Pattern 18 7 0 1 metre HC 2 3 1 Crossline Distance Between Elements in the Pattern 18 8 0 1
69. 019 GRS 1980 6378137 1 metre 298 257222101 HC 1 5 0 Projection 1 15034 SPCS83 Alaska zone 4 meters HC 1 5 1 Projection Method 1 9807 Transverse Mercator 5 HC 1 5 2 Latitude of natural origin 1 8801 54 3 degree HC 1 5 2 Longitude of natural origin 1 8802 150 3 degree HC 1 5 2 Scale factor at natural origin 1 8805 0 9999 4 unity HC 1 5 2 False easting 1 8806 500000 1 metre HC 1 5 2 False northing 1 8807 0 1 metre HC 1 6 0 Coordinate System 1 4499 Cartesian 2D CS 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 1 1 41 Easting east X 1 metre HC 1 6 1 Coordinate System Axis 2 1 2 42 Northing north Y 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 2 4269 2 geographic 2D NAD83 HC 1 4 4 Geodetic Datum 2 6269 North American Datum 1983 HC 1 4 5 Prime Meridian 2 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 2 7019 GRS 1980 6378137 1 metre 298 257222101 HC 1 6 0 Coordinate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 3 4267 2 geographic 2D NAD27 HC 1 4 4 Geodetic Datum 3 6267 North American Datum 1927 HC 1 4 5 Prime Meridian 3 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 3 7008 Clarke 1866 6378206 4 1 metre 294 9787 HC 1 6 0 Coordinate System 3 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis
70. 037840 56 00047790 55 OGP P1 11 Geophysical position data exchange format user guide OGP Number Example Details 8 Projected CRS Transverse Mercator NTv2 transformation NAD27 Alberta 3 degree TM transformation NTv2 Canada HC 1 0 0 Reference Systems Summary 4 0 3 1 HC 1 1 0 Unit of Measure 1 metre length 2 metre 9001 EPSG Dataset 7 6 9001 HC 1 1 0 Unit of Measure 2 radian angle 2 radian 9101 EPSG Dataset 7 6 9101 HC 1 1 0 Unit of Measure 3 degree angle 2 2 0 3 141592654 180 0 degree 9102 EPSG Dataset 7 6 9102 HC 1 1 0 Unit of Measure 4 unity scale 2 unity 9201 EPSG Dataset 7 6 9201 HC 1 1 1 Example Unit Conversion 1 2 1 3 57 295779513 HC 1 3 0 CRS Number EPSG Code Name Source 1 3771 NAD27 Alberta 3TM ref merid 111 W 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4267 NAD27 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 3 4269 NAD83 7 6 2010 11 02 EPSG HC 1 4 0 CRS Number EPSG Code Type Name 1 3771 1 projected NAD27 Alberta 3TM ref merid 111 W HC 1 4 3 Base Geographic CRS 1 2 4267 HC 1 4 4 Geodetic Datum 1 6267 North American Datum 1927 HC 1 4 5 Prime Meridian 1 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 1 7008 Clarke 1866 6378206 4 1 metre 0 HC 1 5 0 Projection 1 17722 Alberta 3 degree TM reference meridian 111 W HC 1 5 1 Projection Method 1 9807 Transverse Mercator 5 HC 1 5 2 Latitude of natural origin 1 8801 0 3 deg
71. 1 3 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 3 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 4 26734 1 projected NAD27 Alaska zone 4 HC 1 4 3 Base Geographic CRS 4 3 4267 OGP 52 International Association of Oil amp Gas Producers HC 1 4 4 Geodetic Datum 4 6267 North American Datum 1927 HC 1 4 5 Prime Meridian 4 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 4 7008 Clarke 1866 6378206 4 1 metre 294 9787 HC 1 5 0 Projection 4 15004 Alaska CS27 zone 4 HC 1 5 1 Projection Method 4 9807 Transverse Mercator 5 HC 1 5 2 Latitude of natural origin 4 8801 54 3 degree HC 1 5 2 Longitude of natural origin 4 8802 150 3 degree HC 1 5 2 Scale factor at natural origin 4 8805 0 9999 4 unity HC 1 5 2 False easting 4 8806 500000 8 US survey foot HC 1 5 2 False northing 4 8807 0 8 US survey foot HC 1 6 0 Coordinate System 4 4497 Cartesian 2D CS 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 4 1 37 Easting east X 8 US survey foot HC 1 6 1 Coordinate System Axis 2 4 2 38 Northing north Y 8 US survey foot HC 1 7 0 Transformation Number EPSG Code Name Source 1 1243 NAD27 to NAD83 2 7 6 2010 11 02 EPSG HC 1 8 0 Transformation Number EPSG Code Type Name 1 1243 1 transformation NAD27 to NAD83 2 0 5 HC 1 8 1 Source CRS Target CRS Version 1 3 4267 NAD27 2 4269 NAD83 NGS Usa AK HC 1 8 2 Transformation Method 1 9613 NADCON 1 2 HC 1 8 3 Latitude differe
72. 1 084 10 42 45 0 4 R1 4 1 164215 8 2451052 6 60 69583621 151 87395297 60 69526684 151 87621140 32 7 27 1 R1 0 111 1747 1 2011 084 10 41 51 0 4 R1 4 1 164275 3 2450898 7 60 69542005 151 87359663 60 69485066 151 87585503 33 7 27 8 R1 0 111 1749 1 2011 084 10 40 59 0 4 R1 4 1 164330 4 2450743 3 60 69499944 151 87326461 60 69443003 151 87552297 34 7 28 5 R1 0 111 1751 1 2011 084 10 40 07 0 4 R1 4 1 164384 2 2450587 2 60 69457682 151 87293973 60 69400739 151 87519806 35 7 29 8 R1 0 111 1753 1 2011 084 10 39 18 0 4 R1 4 1 164450 8 2450435 5 60 69416722 151 87254417 60 69359777 151 87480246 35 7 30 0 R1 0 111 1755 1 2011 084 10 38 28 0 4 R1 4 1 164519 0 2450285 1 60 69376131 151 87213991 60 69319183 151 87439816 35 6 29 7 R1 0 111 1757 1 2011 084 10 37 41 0 4 R1 4 1 164567 2 2450127 5 60 69333415 151 87184605 60 69276465 151 87410427 34 6 28 6 CC 1 0 0 Beginning of Land Data Relational Records X1 0 1 2 1 104 1136 1 1 283 1 111 1065 1629 1 X1 0 1 2 1 104 1136 1 1 283 1 111 1065 1629 1 91 OGP P1 11 Geophysical position data exchange format user guide OGP X1 0 1 3 1 106 1136 1 1 283 1 111 1065 1629 1 X1 0 1 4 1 104 1320 1 1 283 1 111 1065 1629 1 X1 0 1 5 1 107 1331 1 1 283 1 111 1065 1629 1 X1 0 1 18 1 109 1331 1 1 315 1 111 1001 1629 1 X1 0 1 18 1 109 1331 1 316 389 2 111 1631 1703 1 X1 0 1 18 1 109 1331 1 392 617 2 111 170
73. 1 480 391575 40 4092475 40 7 50 36 97154255 16 21804800 36 97018541 16 21937761 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 479 391569 90 4092464 10 7 50 36 97144008 16 21810815 36 97008294 16 21943776 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 478 391564 40 4092452 90 7 50 36 97133851 16 21816832 36 96998136 16 21949793 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 477 391558 80 4092441 70 7 50 36 97123692 16 21822961 36 96987978 16 21955921 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 476 391553 30 4092430 40 7 50 36 97113445 16 21828976 36 96977731 16 21961936 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 475 391547 70 4092419 20 7 50 36 97103287 16 21835105 36 96967572 16 21968065 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 474 391542 30 4092408 10 7 50 36 97093221 16 21841011 36 96957506 16 21973971 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 473 391536 80 4092396 80 7 50 36 97082974 16 21847026 36 96947259 16 21979986 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 472 391531 20 4092385 60 7 50 36 97072816 16 21853154 36 96937100 16 21986114 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 471 391525 70 4092374 30 7 50 36 97062569 16 21859169 36 96926853 16 21992129 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 470 391520 20 4092363 10 7 50 36 97052412 16 21865186 36 96916696 16 219981
74. 1 EPSG Dataset 7 6 9101 HC 1 1 0 Unit of Measure 3 degree angle 2 2 0 3 141592654 180 0 degree 9102 EPSG Dataset 7 6 9102 HC 1 1 0 Unit of Measure 4 unity scale 2 unity 9201 EPSG Dataset 7 6 9201 HC 1 1 0 Unit of Measure 5 arc second angle 2 2 0 3 141592654 648000 0 arc second 9104 EPSG Dataset 7 6 9104 HC 1 1 0 Unit of Measure 6 parts per million scale 2 4 0 1 1000000 0 parts per million 9202 EPSG Dataset 7 6 9202 HC 1 1 1 Example Unit Conversion 1 2 1 3 57 295779513 5 206264 806247097 HC 1 1 1 Example Unit Conversion 2 4 1 6 1000000 HC 1 3 0 CRS Number EPSG Code Name Source 1 23031 ED50 UTM zone 31N 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4230 ED50 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 3 5715 MSL depth 8 0 2012 08 10 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 4 ED50 UTM zone 31N MSL depth HC 1 3 0 CRS Number EPSG Code Name Source 5 4326 WGS 84 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 6 4979 WGS 84 7 6 2010 11 02 EPSG HC 1 4 0 CRS Number EPSG Code Type Name 1 23031 1 projected ED50 UTM zone 31N HC 1 4 3 Base Geographic CRS 1 2 4230 HC 1 4 4 Geodetic Datum 1 6230 European Datum 1950 HC 1 4 5 Prime Meridian 1 8901 Greenwich 0 3 degree CC 1 0 0 Because the prime meridian is Greenwich the HC 1 4 5 record above is optional and may be omitted HC 1 4 6 Ellipsoid 1 7022 International 1924 6378388 1 metre 297 HC 1 5 0 Pr
75. 13 decibels octave attenuation 2 12 0 0 1 1 0 decibels octave POSC Units of Measure Dictionary 2 2 dBPO HC 1 1 0 Unit of Measure 14 cubic metres volume 2 cubic metres POSC Units of Measure Dictionary 2 2 m3 HC 1 1 0 Unit of Measure 15 cubic inch volume 2 14 0 0 000016387 1 0 cubic inch POSC Units of Measure Dictionary 2 2 cu_in HC 1 1 0 Unit of Measure 16 pascals metre force per volume 2 pascals metre POSC Units of Measure Dictionary 2 2 PaPm HC 1 1 0 Unit of Measure 17 bar per meter force per volume 2 16 0 100000 1 0 bar per meter POSC Units of Measure Dictionary 2 2 barPm HC 1 1 0 Unit of Measure 18 pascal force per area 2 pascal POSC Units of Measure Dictionary 2 2 Pa HC 1 1 0 Unit of Measure 19 pounds square inch force per area 2 18 0 6894 757 1 0 pounds square inch POSC Units of Measure Dictionary 2 2 psi HC 1 1 0 Unit of Measure 20 kilogram mass 2 0 kilogram POSC Units of Measure Dictionary 2 2 kg HC 1 1 0 Unit of Measure 21 pounds mass mass 2 20 0 0 4535924 1 0 pounds POSC Units of Measure Dictionary 2 2 lbm 83 OGP P1 11 Geophysical position data exchange format user guide OGP HC 1 1 1 Example Unit Conversion 1 2 1 3 57 29577951 HC 1 1 1 Example Unit Conversion 2 6 1 8 1000 HC 1 1 1 Example Unit Conversion 3 10 1 11 10 HC 1 1 1 Example Unit Conversion 4 12 1 13 10 HC 1 1 1 Exampl
76. 2 EPSG HC 1 4 0 CRS Number EPSG Code Type Name 1 3995 1 projected WGS 84 Arctic Polar Stereographic HC 1 4 3 Base Geographic CRS 1 2 4326 HC 1 4 4 Geodetic Datum 1 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 1 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 1 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 5 0 Projection 1 19842 Arctic Polar Stereographic HC 1 5 1 Projection Method 1 9829 Polar Stereographic variant B 1 4 HC 1 5 2 False easting 1 8806 0 1 metre HC 1 5 2 False northing 1 8807 0 1 metre HC 1 5 2 Latitude of standard parallel 1 8832 71 3 degree HC 1 5 2 Longitude of origin 1 8833 0 3 degree HC 1 6 0 Coordinate System 1 4469 Cartesian 2D CS for north polar azimuthal long 0E 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 1 1 187 Easting South along 90E X 1 metre HC 1 6 1 Coordinate System Axis 2 1 2 188 Northing South along 180E Y 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 2 4326 2 geographic 2D WGS 84 HC 1 4 4 Geodetic Datum 2 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 2 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 1 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 3 4979 3 geographic 3D WGS 84 HC 1 4 4 Geodetic
77. 2506342 9 556 2 R111 10291G1 143020 4 2506188 8 549 3 R111 10311G1 143078 9 2506035 5 538 7 R111 10331G1 143138 7 2505880 2 526 6 R111 10351G1 143197 3 2505726 8 521 6 R111 10371G1 143256 2 2505572 2 515 2 R111 10391G1 143315 4 2505418 8 508 3 Sample marine receiver position data from this survey R111 17191R1 19 0 163434 5 2453047 7 13 3084105520 R111 17211R1 23 0 163502 4 2452899 8 16 9084105434 R111 17231R1 26 0 163560 2 2452745 5 20 2084105355 R111 17251R1 29 0 163615 8 2452589 3 23 2084105310 R111 17271R1 31 0 163681 1 2452438 5 25 4084105226 R111 17291R1 33 0 163731 2 2452280 7 27 0084105141 R111 17311R1 34 9 163794 5 2452129 3 28 9084105050 R111 17331R1 36 9 163791 2 2451951 5 30 7084104850 81 OGP P1 11 Geophysical position data exchange format user guide OGP R111 17351R1 35 9 163896 1 2451813 7 29 8084104714 R111 17371R1 34 8 163962 0 2451662 0 29 3084104612 R111 17391R1 35 8 164023 9 2451509 2 29 7084104520 R111 17411R1 35 8 164098 7 2451360 9 29 6084104426 R111 17431R1 34 8 164157 4 2451207 3 28 6084104337 R111 17451R1 32 7 164215 8 2451052 6 27 1084104245 R111 17471R1 33 7 164275 3 2450898 7 27 8084104151 R111 17491R1 34 7 164330 4 2450743 3 28 5084104059 R111 17511R1 35 7 164384 2 2450587 2 29 8084104007 R111 17531R1 35 7 164450 8 2450435 5 30 0084103918 R111 17551R1 35 6 164519 0 2450285 1 29 7084103828 R111 17571R1 34 6 164567 2 2450127 5 28 6084103741 Sample relational data from this survey
78. 27 to NAD83 2 0 5 HC 1 8 1 Source CRS Target CRS Version 1 3 4267 NAD27 6 4269 NAD83 NGS Usa AK HC 1 8 2 Transformation Method 1 9613 NADCON 1 2 HC 1 8 3 Latitude difference file 1 8657 alaska las 1 HC 1 8 3 Longitude difference file 1 8658 alaska los 1 HC 1 9 0 Example Coordinate 1 2 60 65333002 151 83955293 1 169943 7 2435345 1 6 60 65275835 151 84180802 HC 2 0 0 Survey Configuration 2 4 13 5 US Survey Foot HC 2 1 0 Sercel SN428 Cable Free Seismic Acquisition System 1 Acquisition Management Sercel SN428XL Model 0001 HC 2 1 1 Method Of Transfer With Recording System 1 20 Manual Entry HC 2 1 1 Polarity 1 1 SEG HC 2 1 1 Sample Interval 1 2 2 8 milliseconds HC 2 1 1 Record Length 1 3 12 7 second HC 2 1 1 Channels Per Record 1 4 1463 HC 2 1 1 Tape Type 1 5 Hard Disk HC 2 1 1 Tape Format 1 6 SEG D 8058 32 bit IEEE demultiplexed HC 2 1 1 Tape Density 1 7 Hard Disk HC 2 1 1 Filter Alias Hz dB pnt slope 1 100 0 8 Nyquist Minimum Phase HC 2 1 1 Filter_low Hz dB pnt slope 1 14 Out HC 2 1 1 Time delay FTB SOD app Y N 1 17 0 8 milliseconds HC 2 1 1 Time Delay FTB to SOD Applied to Data Flag 1 18 Not applied HC 2 1 1 Multi component recording 1 19 Z HC 2 1 2 Auxilliary Channel 1 Definition 1 1 Confirmation TB HC 2 1 2 Auxilliary Channel 2 Definition 1 2 Reference HC 2 1 2 Auxilliary Channel 3 Defi
79. 3 0 3 amp 13 G2 amp S10 1 391043 40 4092950 60 36 97636469 16 22415595 36 97636469 16 22415595 2 2 1 2 184 1 1 1 7 2 2 Position Coordinates Each position record provides fields for the positioning object referenced to 3 CRSs The meaning of coordinate values in position records is defined through CRS coordinate axis records in the Common Header HC 1 6 1 It is a requirement of the format for position records of positioning objects that the first CRS fields 13 15 is the projected CRS or compound CRS encompassing the projected CRS and the second CRS fields 16 18 is the base geographic CRS of the first expressed in decimal degrees recommended to 8 decimal places It is recommended that the third position reference is the original or hub CRS of the acquisition phase This provides a compatibility check between the coordinate transformation details defined in the Common Header and the coordinates in the second and third CRS positions 30 International Association of Oil amp Gas Producers OGP 7 2 3 Position Quality This section refers equally to R1 receiver records see section 7 3 For offshore or land acquisition it is required that as a minimum the following quality measures are written to the data records namely The 2D error ellipse or 3D error ellipsoid as a precision measure for offshore data The radial and height error estimates for land data Additional quality values can be added using user define
80. 40 28480445 79 40425033 40 28485406 79 40400560 S1 0 5NE 258 4 1 1 SP 1 1538571 0 351161 0 1070 40 28545842 79 40402255 40 28550802 79 40377778 S1 0 5NE 258 5 1 1 SP 1 1538648 0 351395 0 1082 40 28610462 79 40376231 40 28615415 79 40352109 S1 0 5NE 258 6 1 1 SP 1 1538723 0 351631 0 1068 40 28675620 79 40350937 40 28680297 79 40326804 S1 0 5NE 258 7 1 1 SP 1 1538797 0 351864 0 1088 40 28739951 79 40325980 40 28744904 79 40301492 S1 0 5NE 258 8 1 1 SP 1 1538874 0 352098 0 1093 40 28804570 79 40299954 40 28809247 79 40275456 S1 0 5NE 258 9 1 1 SP 1 1538961 0 352328 0 1097 40 28868144 79 40270317 40 28872820 79 40245815 S1 0 5NE 258 10 1 1 SP 1 1539068 0 352551 0 1072 40 28929898 79 40233465 40 28934841 79 40209325 S1 0 5NE 258 11 1 1 SP 1 1539185 0 352766 0 1064 40 28989509 79 40192975 40 28994180 79 40168465 S1 0 5NE 258 12 1 1 SP 1 1539314 0 352975 0 1076 40 29047534 79 40148143 40 29052202 79 40123630 S1 0 5NE 258 13 1 1 SP 1 1539452 0 353178 0 1074 40 29103958 79 40100044 40 29108623 79 40075527 S1 0 5NE 258 14 1 1 SP 1 1539608 0 353366 0 1093 40 29156357 79 40045392 40 29161295 79 40020879 S1 0 5NE 258 15 1 1 SP 1 1539734 0 353579 0 1084 40 29215464 79 40001660 40 29220400 79 39977142 S1 0 5NE 258 16 1 1 SP 1 1539792 0 353816 0 1084 40 29280809 79 39982459 40 29285742
81. 46 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 469 391514 60 4092351 80 7 50 36 97042163 16 21871313 36 96906447 16 22004273 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 468 391509 30 4092341 10 7 50 36 97032459 16 21877112 36 96896743 16 22010072 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 467 391503 80 4092329 80 7 50 36 97022212 16 21883127 36 96886496 16 22016086 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 466 391498 20 4092318 60 7 50 36 97012054 16 21889256 36 96876337 16 22022215 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 465 391492 70 4092307 30 7 50 36 97001806 16 21895271 36 96866090 16 22028230 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 464 391487 20 4092296 10 7 50 36 96991649 16 21901287 36 96855933 16 22034246 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 463 391481 60 4092284 80 7 50 36 96981401 16 21907414 36 96845684 16 22040373 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 462 391476 20 4092273 70 7 50 36 96971335 16 21913320 36 96835618 16 22046279 R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 461 391470 70 4092262 50 7 50 36 96961178 16 21919336 36 96825461 16 22052295 The second example shows multiple receiver records per line and is the recommended format for writing receiver records into the P1 11 file R1 0 T21021P1002 1001 1 2010 246 14 56 23 0 4 S1 1 480 391575 40
82. 46145623 TT21021P1002 1 4 1001365527 69N01615 0 70W 388650 24087211 2 17 3246145623 TT21021P1002 1 5 1001365529 22N01615 4 26W 388562 64087259 5 17 3246145623 TT21021P1002 1 6 1001365530 76N01615 7 81W 388475 34087308 1 17 3246145623 TT21021P1002 1 7 1001365532 26N0161511 40W 388387 14087355 3 17 3246145623 TT21021P1002 1 8 1001365533 85N0161514 92W 388300 64087405 6 17 3246145623 TT21021P1002 1 9 1001365535 43N0161518 46W 388213 74087455 3 17 3246145623 TT21021P1002 1 A 1001365536 96N0161522 03W 388126 24087503 6 17 3246145623 67 OGP P1 11 Geophysical position data exchange format user guide OGP After conversion to P1 11 format this P1 90 file would appear as follows OGP OGP P1 1 1 1 2012 07 13 08 09 31 CSL T21021P1002 p111 OGP HC 0 1 0 Project Name Test TEST01 2010 08 01 2010 09 03 HC 0 2 0 Survey Description Marine 3D Towed Streamer 2 SOURCE 10 STREAMER North Block 21 578 NOR HC 0 3 0 Approximate Data Location 16 222 16 177 36 976 37 04 HC 0 4 0 Client Oil Company Limited HC 0 5 0 Geophysical Contractor Oil Finder Inc HC 0 6 0 Positioning Contractor General Positioning Limited HC 0 7 0 Position Processing Contractor Position Processing Limited HC 1 0 0 Reference Systems Summary 5 1 7 1 HC 1 1 0 Unit of Measure 1 metre length 2 metre 9001 EPSG Dataset 7 6 9001 HC 1 1 0 Unit of Measure 2 radian angle 2 radian 9101 EPSG Dataset 7 6 9101 HC 1 1 0 Unit of Measure 3 degree angle 2 2 0 3 141592654 18
83. 5 Lowest Astronomical Tide HC 1 4 8 Engineering Datum Details The following example contains the details for a seismic bin grid which is classified as an engineering datum as they would appear in record HC 1 4 8 HC 1 4 8 Engineering Datum 6 9315 Seismic bin grid datum HC 1 5 0 Map Projection Details Projected CRS Only The record containing the explicit description of the projected CRS s map projection would appear in HC 1 5 0 as follows HC 1 5 0 Map Projection 1 16031 UTM zone 31N HC 1 5 0 Map Projection 2 16061 Universal Polar Stereographic North HC 1 5 0 Map Projection 3 19894 Borneo RSO HC 1 5 1 Projection Method Details Projected CRS Only The record containing the method details of the projected CRSs would appear in HC 1 5 1 as follows HC 1 5 1 Projection Method 1 9807 Transverse Mercator 5 HC 1 5 1 Projection Method 2 9810 Polar Stereographic Variant A 5 HC 1 5 1 Projection Method 3 9812 Hotine Oblique Mercator Variant A 7 In the event that a coordinate operation method code Field 7 is not available in the EPSG Dataset unlikely as the EPSG dataset supports nearly all methods currently in use in the oil and gas industry the projection and projected CRS cannot be
84. 5 390 HC 2 3 0 Source G2 3 G2 4 Air Gun 1 25 390 HC 2 3 0 Streamer S1 4 S1 2 Streamer 1 450 700 1 HC 2 3 0 Streamer S2 5 S2 2 Streamer 1 350 700 1 HC 2 3 0 Streamer S3 6 S3 2 Streamer 1 250 700 1 HC 2 3 0 Streamer S4 7 S4 2 Streamer 1 150 700 1 HC 2 3 0 Streamer S5 8 S5 2 Streamer 1 50 700 1 HC 2 3 0 Streamer S6 9 S6 2 Streamer 1 50 700 1 HC 2 3 0 Streamer S7 10 S7 2 Streamer 1 150 700 1 HC 2 3 0 Streamer S8 11 S8 2 Streamer 1 250 700 1 HC 2 3 0 Streamer S9 12 S9 2 Streamer 1 350 700 1 HC 2 3 0 Streamer S10 13 S10 2 Streamer 1 450 700 1 HC 2 3 0 Train 2 Echo 1 14 V1E1 11 Echo Sounder 1 HC 2 3 0 GPS V1G1 15 V1G1 21 GPS Antenna 1 0 41 0 HC 2 3 0 GPS V1G2 16 V1G2 21 GPS Antenna 1 0 43 0 HC 2 3 0 GPS V1R1 17 V1R1 21 GPS Antenna 1 0 0 HC 2 3 0 Tailbuoy on S1 25 T1 10 Float 4 HC 2 3 0 Tailbuoy on S2 26 T2 10 Float 5 HC 2 3 0 Tailbuoy on S3 27 T3 10 Float 6 HC 2 3 0 Tailbuoy on S4 28 T4 10 Float 7 HC 2 3 0 Tailbuoy on S5 29 T5 10 Float 8 HC 2 3 0 Tailbuoy on S6 30 T6 10 Float 9 HC 2 3 0 Tailbuoy on S7 31 T7 10 Float 10 HC 2 3 0 Tailbuoy on S8 32 T8 10 Float 11 HC 2 3 0 Tailbuoy on S9 33 T9 10 Float 12
85. 5 1929 1 X1 0 1 19 1 110 1331 1 1 315 1 111 1001 1629 1 X1 0 1 19 1 110 1331 1 316 389 2 111 1631 1703 1 X1 0 1 19 1 110 1331 1 392 617 2 111 1705 1929 1 X1 0 1 20 1 109 1336 1 1 315 1 111 1001 1629 1 X1 0 1 20 1 109 1336 1 316 389 2 111 1631 1703 1 X1 0 1 20 1 109 1336 1 392 617 2 111 1705 1929 1 X1 0 1 21 1 110 1336 1 1 315 1 111 1001 1629 1 X1 0 1 21 1 110 1336 1 316 389 2 111 1631 1703 1 X1 0 1 21 1 110 1336 1 392 617 2 111 1705 1929 1 X1 0 1 22 1 109 1340 1 1 315 1 111 1001 1629 1 X1 0 1 22 1 109 1340 1 316 389 2 111 1631 1703 1 X1 0 1 22 1 109 1340 1 392 617 2 111 1705 1929 1 92 International Association of Oil amp Gas Producers OGP Appendix F Client End User Checklist The checklist below is provided to enable an end user to define specific requirements of the P1 11 and P2 11 files It is a pointer to the sections of the formats where the format writer may need to request content guidance or advice around optional items COMMON HEADER Section Reference Item Details Common Header HC 0 1 0 Project Name Common Header HC 0 2 0 Survey Location Common Header HC 1 2 0 Time Reference UTC GPS etc Common Header HC 1 3 0 CRS1 Code EPSG if available CRS1 Name used for data Common Header HC 1 3 0 CRS2 Code EPSG if available CRS2 Name used for data Common Header HC 1 3 0 CRS3 Code EPSG if available CRS3 Name used for data Hub or Reference CRS eg WGS 84 Common
86. 6 H26 5678901234567890123456789012345678901234567890123456789012345678901234567890 H26 1 2 3 4 5 6 7 8 79 OGP P1 11 Geophysical position data exchange format user guide OGP Sample land source dynamite position data from this survey S104 11361E2 25 38 146155 2 2497892 5 25 1077141352 S106 11361E4 35 51 146183 3 2497903 5 25 3077141914 S104 13201E2 25 13 151581 4 2483715 8 24 0077152401 S107 13311E5 45 18 151947 4 2482884 0 23 2077153411 S109 13311E7 25 19 151975 5 2482894 9 23 2084152530 S110 13311E8 35 19 151989 8 2482900 3 23 2084152948 S109 13361E7 25 32 152123 2 2482509 4 23 5084153814 S110 13361E8 35 36 152137 3 2482515 0 23 2084154228 S109 13401E7 25 29 152241 3 2482201 7 23 2084154856 S110 13401E8 32 30 152254 8 2482206 8 23 2084155135 S109 16531E7 25 8 161478 0 2458073 9 12 3084155422 S109 13571E7 25 28 152742 6 2480891 8 23 1084160120 S109 16481E7 25 8 161323 6 2458470 0 13 3084160307 S110 13571E8 35 28 152756 7 2480897 1 22 9084160353 S110 16481E8 25 5 161337 7 2458475 6 13 3084160704 S109 13601E7 25 23 152831 5 2480660 2 23 2084160951 S110 13601E8 35 26 152845 2 2480665 8 23 0084161219 S109 13681E7 25 21 153066 8 2480044 2 23 6084162254 S110 13681E8 35 19 153081 1 2480049 5 23 4084162526 S108 13681E6 40 24 153052 6 2480038 5 23 5084162806 Sample marine airgun source position data from this survey S101 17851A6 7 51 165018 5 2447784 0 085090954 S101 17841A6 7 51 164987 3 2447860 2 085091008 S101 17831A6 7 51 164964
87. 6 35 S1 0 109 1368 1 2011 084 16 22 54 0 12 E7 1 153066 8 2480044 2 23 6 60 77421896 151 94091244 60 77365246 151 94316746 21 25 S1 0 110 1368 1 2011 084 16 25 26 0 13 E8 1 153081 1 2480049 5 23 4 60 77423461 151 94083337 60 77366811 151 94308839 19 35 S1 0 108 1368 1 2011 084 16 28 06 0 11 E6 1 153052 6 2480038 5 23 5 60 77420223 151 94099089 60 77363573 151 94324590 24 40 CC 1 0 0 Beginning of Marine Shots S1 0 101 1785 1 2011 085 09 09 54 0 18 A6 2 165018 5 2447784 0 60 68696154 151 86895732 60 68639171 151 87121514 51 7 S1 0 101 1784 1 2011 085 09 10 08 0 18 A6 2 164987 3 2447860 2 60 68716747 151 86914337 60 68659764 151 87140121 51 7 S1 0 101 1783 1 2011 085 09 10 21 0 18 A6 2 164964 5 2447938 6 60 68738006 151 86928294 60 68681024 151 87154079 51 7 S1 0 101 1782 1 2011 085 09 10 34 0 18 A6 2 164947 9 2448020 5 60 68760270 151 86938850 60 68703290 151 87164636 52 7 S1 0 101 1781 1 2011 085 09 10 47 0 18 A6 2 164937 4 2448104 4 60 68783129 151 86946036 60 68726150 151 87171824 52 7 S1 0 101 1780 1 2011 085 09 11 00 0 18 A6 2 164927 0 2448188 0 60 68805907 151 86953162 60 68748929 151 87178951 52 7 S1 0 101 1779 1 2011 085 09 11 13 0 18 A6 2 164913 8 2448272 8 60 68828990 151 86961868 60 68772014 151 87187658 52 7 S1 0 101 1778 1 2011 085 09 11 26 0 18 A6 2 164895 7 2448354 4 60 68851161 151 86973256 60 68
88. 715 Land source receiver heights referenced to MSL height EPSG 5714 HC 1 0 0 Reference Systems Summary 5 1 7 1 HC 1 1 0 Unit of Measure 1 metre length 2 metre 9001 EPSG Dataset 7 6 9001 HC 1 1 0 Unit of Measure 2 radian angle 2 radian 9101 EPSG Dataset 7 6 9101 HC 1 1 0 Unit of Measure 3 degree angle 2 2 0 3 141592654 180 0 degree 9102 EPSG Dataset 7 6 9102 HC 1 1 0 Unit of Measure 4 unity scale 2 unity 9201 EPSG Dataset 7 6 9201 HC 1 1 0 Unit of Measure 7 second time 12 second POSC UoM Dictionary 2 2 s HC 1 1 1 Example Unit Conversion 1 2 1 3 57 295779506 HC 1 2 0 Time Reference System 1 1 0 UTC 0 7 HC 1 3 0 CRS Number EPSG Code Name Source 1 2310 WGS 84 TM 132 SE 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4326 WGS 84 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 3 5715 MSL depth 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 4 WGS 84 TM 132 SE MSL depth HC 1 3 0 CRS Number EPSG Code Name Source 5 4979 WGS 84 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 6 5714 MSL height 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 7 WGS 84 TM 132 SE MSL height HC 1 4 0 CRS Number EPSG Code Type Name 1 2310 1 projected WGS 84 TM 132 SE HC 1 4 3 Base Geographic CRS 1 2 4326 HC 1 4 4 Geodetic Datum 1 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 1 8901 Gre
89. 745 5 60 70041382 151 87787941 60 69984466 151 88013802 26 0 20 2 R1 0 111 1725 1 2011 084 10 53 10 0 4 R1 4 1 163615 8 2452589 3 60 69999108 151 87754436 60 69942190 151 87980296 29 0 23 2 R1 0 111 1727 1 2011 084 10 52 26 0 4 R1 4 1 163681 1 2452438 5 60 69958386 151 87715608 60 69901466 151 87941467 31 0 25 4 R1 0 111 1729 1 2011 084 10 51 41 0 4 R1 4 1 163731 2 2452280 7 60 69915631 151 87685147 60 69858709 151 87911005 33 0 27 0 R1 0 111 1731 1 2011 084 10 50 50 0 4 R1 4 1 163794 5 2452129 3 60 69874729 151 87647426 60 69817806 151 87873283 34 9 28 9 R1 0 111 1733 1 2011 084 10 48 50 0 4 R1 4 1 163791 2 2451951 5 60 69826088 151 87646433 60 69769163 151 87872289 36 9 30 7 R1 0 111 1735 1 2011 084 10 47 14 0 4 R1 4 1 163896 1 2451813 7 60 69789229 151 87585727 60 69732303 151 87811583 35 9 29 8 R1 0 111 1737 1 2011 084 10 46 12 0 4 R1 4 1 163962 0 2451662 0 60 69748265 151 87546554 60 69691337 151 87772409 34 8 29 3 R1 0 111 1739 1 2011 084 10 45 20 0 4 R1 4 1 164023 9 2451509 2 60 69706969 151 87509596 60 69650039 151 87735450 35 8 29 7 R1 0 111 1741 1 2011 084 10 44 26 0 4 R1 4 1 164098 7 2451360 9 60 69667004 151 87465515 60 69610072 151 87691366 35 8 29 6 R1 0 111 1743 1 2011 084 10 43 37 0 4 R1 4 1 164157 4 2451207 3 60 69625464 151 87430331 60 69568530 151 87656178 34 8 28 6 R1 0 111 1745 1 201
90. 794186 151 87199048 54 7 S1 0 101 1777 1 2011 085 09 11 40 0 18 A6 2 164872 0 2448432 6 60 68872359 151 86987712 60 68815384 151 87213506 56 7 S1 0 101 1776 1 2011 085 09 11 54 0 18 A6 2 164840 2 2448509 2 60 68893056 151 87006661 60 68836082 151 87232456 59 7 S1 0 101 1775 1 2011 085 09 12 08 0 18 A6 2 164806 9 2448585 4 60 68913631 151 87026439 60 68856659 151 87252236 60 7 S1 0 101 1774 1 2011 085 09 12 22 0 18 A6 2 164774 5 2448660 9 60 68934023 151 87045705 60 68877052 151 87271504 61 7 S1 0 101 1773 1 2011 085 09 12 36 0 18 A6 2 164744 7 2448737 7 60 68954790 151 87063541 60 68897820 151 87289342 61 7 S1 0 101 1772 1 2011 085 09 12 50 0 18 A6 2 164715 5 2448815 0 60 68975698 151 87081052 60 68918730 151 87306854 60 7 S1 0 101 1771 1 2011 085 09 13 04 0 18 A6 2 164684 5 2448891 8 60 68996456 151 87099558 60 68939488 151 87325362 57 7 S1 0 101 1770 1 2011 085 09 13 18 0 18 A6 2 164652 6 2448968 4 60 69017152 151 87118563 60 68960185 151 87344370 55 7 S1 0 101 1769 1 2011 085 09 13 33 0 18 A6 2 164621 7 2449044 7 60 69037774 151 87137006 60 68980808 151 87362814 52 7 S1 0 101 1768 1 2011 085 09 13 47 0 18 A6 2 164592 4 2449122 0 60 69058681 151 87154573 60 69001717 151 87380383 50 7 S1 0 101 1767 1 2011 085 09 14 00 0 18 A6 2 164567 1 2449200 3 60 69079893 151 87169926 60 69022930 151 87395738 46 7
91. 801 0 3 degree HC 1 5 2 Longitude of natural origin 1 8802 87 3 degree HC 1 5 2 Scale factor at natural origin 1 8805 0 9996 4 unity HC 1 5 2 False easting 1 8806 1640416 67 5 US survey foot HC 1 5 2 False northing 1 8807 0 5 US survey foot HC 1 6 0 Coordinate System 1 4497 Cartesian 2D CS 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 1 1 37 Easting east X 5 US survey foot HC 1 6 1 Coordinate System Axis 2 1 2 38 Northing north Y 5 US survey foot HC 1 4 0 CRS Number EPSG Code Type Name 2 4267 2 geographic 2D NAD27 HC 1 4 4 Geodetic Datum 2 6267 North American Datum 1927 HC 1 4 5 Prime Meridian 2 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 2 7008 Clarke 1866 6378206 4 1 metre 0 HC 1 6 0 Coordinate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 3 5715 5 vertical MSL depth HC 1 4 7 Vertical Datum 3 5100 Mean Sea Level HC 1 6 0 Coordinate System 3 6498 Vertical CS 5 vertical 1 HC 1 6 1 Coordinate System Axis 1 3 1 113 Depth down D 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 4 6 compound NAD27 BLM 16N ftUS MSL depth HC 1 4 1 Compound Horizontal CRS 4 1 NAD27 BLM 16N ftUS HC 1 4 2 Compound Vertical CRS 4 3 MSL depth HC 1 4 0 CRS Number EPSG Code Type Name 5 4269 2 geographic 2D NAD83
92. 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 1 7016 Everest 1830 1967 Definition 6377298 556 1 metre 300 8017 HC 1 5 0 Projection 1 19958 Rectified Skew Orthomorphic Borneo Grid metres HC 1 5 1 Projection Method 1 9815 Hotine Oblique Mercator variant B 7 HC 1 5 2 Latitude of projection centre 1 8811 4 5 sexagesimal DMS HC 1 5 2 Longitude of projection centre 1 8812 115 5 sexagesimal DMS HC 1 5 2 Azimuth of initial line 1 8813 53 18569537 5 sexagesimal DMS HC 1 5 2 Angle from Rectified to Skew Grid 1 8814 53 07483685 5 sexagesimal DMS HC 1 5 2 Scale factor on initial line 1 8815 0 99984 4 unity HC 1 5 2 Easting at projection centre 1 8816 590476 87 1 metre HC 1 5 2 Northing at projection centre 1 8817 442857 65 1 metre HC 1 6 0 Coordinate System 1 4400 Cartesian 2D CS 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 1 1 1 Easting east E 1 metre HC 1 6 1 Coordinate System Axis 2 1 2 2 Northing north N 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 2 4298 2 geographic 2D Timbalai 1948 HC 1 4 4 Geodetic Datum 2 6298 Timbalai 1948 HC 1 4 5 Prime Meridian 2 8901 Greenwich 0 3 degree HC 1 4 6 E nate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 3 4326 2 geographic 2D WGS 84 HC 1 4 4 Geodetic Datum 3 6326 World
93. 96 4 unity HC 1 5 2 False easting 1 8806 500000 1 metre HC 1 5 2 False northing 1 8807 0 1 metre HC 1 6 0 Coordinate System 1 4400 Cartesian 2D CS 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 1 1 1 Easting east E 1 metre HC 1 6 1 Coordinate System Axis 2 1 2 2 Northing north N 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 2 4326 2 geographic 2D WGS 84 HC 1 4 4 Geodetic Datum 2 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 2 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 2 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 3 5715 5 vertical MSL depth HC 1 4 7 Vertical Datum 3 5100 Mean Sea Level HC 1 6 0 Coordinate System 3 6498 Vertical CS 5 vertical 1 HC 1 6 1 Coordinate System Axis 1 3 1 113 Depth down D 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 4 6 compound WGS 84 UTM zone 28N MSL depth HC 1 4 1 Compound Horizontal CRS 4 1 WGS 84 UTM zone 28N HC 1 4 2 Compound Vertical CRS 4 3 MSL depth HC 1 4 0 CRS Number EPSG Code Type Name 5 5 vertical SL depth OGP 68 International Association of Oil amp Gas Producers HC 1 4 7 Vertical Datum 5 5113 Sea Level HC 1 6 0 Coordinate System 5 6498 Vertical CS 5 vertica
94. C 1 5 2 Latitude of natural origin 3 8801 0 3 degree HC 1 5 2 Longitude of natural origin 3 8802 3 3 degree HC 1 5 2 Scale factor at natural origin 3 8805 0 9996 4 unity HC 1 5 2 False easting 3 8806 500000 1 metre HC 1 5 2 False northing 3 8807 0 1 metre HC 1 6 0 Coordinate System 3 4400 Cartesian 2D CS 2 cartesian 2 HC 1 6 1 Coordinate System Axis 1 3 1 1 Easting east E 1 metre HC 1 6 1 Coordinate System Axis 2 3 2 2 Northing north N 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 4 5715 5 vertical MSL depth HC 1 4 7 Vertical Datum 4 5100 Mean Sea Level HC 1 6 0 Coordinate System 4 6498 Vertical CS 5 vertical 1 HC 1 6 1 Coordinate System Axis 1 4 1 113 Depth down D 1 metre The next block of data should be the implicit identification statement of all the coordinate transformations between CRSs associated with the survey HC 1 7 0 and should be repeated for as many coordinate transformations that are involved from preplot through acquisition to re processing It is recommended that the integer Coordinate Transformation Number field 6 assigned to each transformation should reflect the history of
95. CRS code 4978 allocated say file CRSREF number 1 The coordinates were then transformed to a classical system say ED50 EPSG CRS code 4230 file CRSREF number 2 In the P format position records CRSREF 1 coordinates will be geocentric Cartesian CRSREF 2 coordinates will be geographic 2D and the header descriptions for CRSREF 1 and 2 will give the EPSG CRS codes as 4978 and 4230 respectively and the CRS types as geocentric and geographic 2D respectively However the transformation s source EPSG CRS code will be given as 4326 the code for the geographic 2D form of the WGS 84 CRS in which case this geographic 2D form 4326 must also be documented and defined with a CRSREF integer code Conversely if the transformation operated in the geocentric CRS domain for example it used the geocentric translations method and the source or target CRS were a classical system such as ED50 there will be no entry in the EPSG Dataset for ED50 datum associated with a geocentric 3D Cartesian coordinate system Such system is assumed to be internal to the transformation application In such circumstances there is no requirement for the implicitly used CRS ED50 geocentric to be documented in the P format header records 2 4 3 Control of Positional Integrity As has been emphasised it is recommended that where a CRS used in a survey is included in the EPSG Dataset appropriate reference should be made to it in this section of the Common Header
96. Code Name Source 1 1133 ED50 to WGS 84 1 7 6 2010 11 02 EPSG HC 1 7 0 Transformation Number EPSG Code Name Source 2 15593 geographic3D to geographic2D 7 6 2010 11 02 EPSG HC 1 8 0 Transformation Number EPSG Code Type Name 1 1133 1 transformation ED50 to WGS 84 1 10 HC 1 8 1 Source CRS Target CRS Version 1 2 4230 ED50 7 4326 WGS 84 DMA mean HC 1 8 2 Transformation Method 1 9603 Geocentric translations geog2D domain 1 3 HC 1 8 4 X axis translation 1 8605 87 1 metre 1 HC 1 8 4 Y axis translation 1 8606 98 1 metre 1 HC 1 8 4 Z axis translation 1 8607 121 1 metre 1 HC 1 8 0 Transformation Number EPSG Code Type Name 2 15593 2 conversion geographic3D to geographic2D HC 1 8 1 Source CRS Target CRS Version 2 8 4979 WGS 84 7 4326 WGS 84 HC 1 8 2 Transformation Method 2 9659 Geographic3D to 2D conversion 1 0 HC 1 9 0 Example Point Conversion 1 8 45 50000000 13 80000000 0 000 1 593870 32 5039425 61 2 45 50119287 13 79851683 7 45 50000000 13 80000000 HC 2 0 0 Survey Configuration 1 0 24 1 metre HC 2 1 0 Orca 1 Navigation Orca 1 8 1 2010 12 02 HC 2 3 0 Train 2 1 V1 1 Vessel 13 HC 2 3 0 Source G1 2 G1 4 Air Gun 1 HC 2 3 0 Source G2 3 G2 4 Air Gun 1 HC 2 3 0 Streamer S1 4 S1 2 Streamer 1 1 HC 2 3 0 Streamer S2 5 S2 2 Streamer 1 1 HC 2 3 0 Streamer S3 6 S3 2 Streamer 1 1 HC 2 3 0 Streamer S4 7 S4 2 Streamer 1 1 OGP 58
97. D88 height 8 0 2012 08 10 EPSG http www epsg registry org HC 1 4 0 Coordinate Reference System Details Common Header record HC 1 4 0 identifies the CRS type in field 8 CRSTYPEREF and is the first record in the block containing each CRS explicit definition grouped together here only for demonstration purposes 17 OGP P1 11 Geophysical position data exchange format user guide OGP HC 1 4 0 CRS Number EPSG Code Type Name 1 32631 1 projected WGS 84 UTM zone 31N HC 1 4 0 CRS Number EPSG Code Type Name 2 4326 2 geographic 2D WGS 84 HC 1 4 0 CRS Number EPSG Code Type Name 3 4979 3 geographic 3D WGS 84 HC 1 4 0 CRS Number EPSG Code Type Name 4 4978 4 geocentric WGS 84 HC 1 4 0 CRS Number EPSG Code Type Name 5 5715 5 vertical MSL depth HC 1 4 0 CRS Number EPSG Code Type Name 6 5818 6 engineering OGP P6 seismic bin grid HC 1 4 0 CRS Number EPSG Code Type Name 7 5498 7 compound NAD83 NAVD88 height HC 1 4 0 CRS Number EPSG Code Type Name 8 7 compound WGS 84 UTM zone 31N MSL depth HC 1 4 0 CRS Number EPSG Code Type Name 9 4269 2 geographic 2D NAD83 HC 1 4 0 CRS Number EPSG Code Type Name 10 5703 5 vertical NAVD88 height HC 1 4 0 CRS Number EPSG Code Type Name 11 26782 1 projected
98. Furthermore this should not preclude the full exposition of all the coordinate reference system parameters in the header It is recognized that although the EPSG dataset is stable and items are not removed only deprecated it is subject to proprietary usage and content Provision is made to reference the name of the geodetic parameter dataset and its versioning to further clarify CRS definitions While the use of EPSG coding is inherent provision of explicit definitions is required as well as additional versioning support Regardless of the coordinates in a P1 11 file the full set of survey geodetic information shall be retained in the Common Header to ensure that any transformation back to a common or original CRS such as WGS 84 uses the correct parameters It is critical that the explicit expounds all parameters and values and implicit EPSG code only definitions of the CRS do not conflict in any of their components The onus is on the party responsible for writing or checking the P1 11 file to employ adequate quality control to ensure no such conflict arises The format requires the inclusion of both the projected CRS grid position and base geographic CRS lat long coordinate values of the projected CRS to be present in the data records Cross conversion between these may assist in distinguishing the correct definition of each CRS if the implicit and explicit definitions disagree in either CRS A further provision is made in the format to resolve s
99. Geodetic System 1984 HC 1 4 5 Prime Meridian 3 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 3 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 3 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 3 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 3 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 4 4979 3 geographic 3D WGS 84 HC 1 4 4 Geodetic Datum 4 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 4 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 4 7030 WGS 84 6378137 1 metre 298 257223563 47 OGP P1 11 Geophysical position data exchange format user guide OGP HC 1 6 0 Coordinate System 4 6423 Ellipsoidal 3D CS 3 ellipsoidal 3 HC 1 6 1 Coordinate System Axis 1 4 1 108 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 4 2 109 Geodetic longitude east Long 3 degree HC 1 6 1 Coordinate System Axis 3 4 3 110 Ellipsoidal height up h 1 metre HC 1 7 0 Transformation Number EPSG Code Name Source 1 1592 Timbalai 1948 to WGS 84 2 7 6 2010 11 02 EPSG HC 1 7 0 Transformation Number EPSG Code Name Source 2 15593 geographic3D to geographic2D 7 6 2010 11 02 EPSG HC 1 8 0 Transformation Number EPSG Code Name 1 1592 Timbalai 1948 to WGS 84 2 5 HC 1 8 1 Source CRS Target CRS Version 1 2 4298 Timbalai 1948 3 4326 WGS 84 BSP Brn HC 1 8 2 Transformation Method 1 9603 Geocentric translations ge
100. Header HC 1 4 2 Vertical CRS Code Vertical CRS Name If a compound CRS is selected Common Header HC 1 7 0 Transformation 1 Code EPSG Transformation 1 Name Common Header HC 1 7 0 Transformation 2 Code EPSG Transformation 2 Name Common Header HC 1 7 0 Transformation 3 Code EPSG Transformation 3 Name Common Header HC 2 1 1 Production System Attributes Common Header HC 2 2 1 Receiver attributes Common Header HC 2 3 0 Objects to be positioned Common Header HC 2 3 1 Object attributes Common Header CC x x x Entire project related comments Common Header Description Fields Padding of records for readability text left right justified 93 OGP P1 11 Geophysical position data exchange format user guide OGP P1 11 specific Header H1 and P1 Data Records Section Reference Item Details P1 Header H1 0 2 0 File Attribute Values P1 Header H1 1 0 0 P1 S1 Position Record Extension Fields including Vertical CRS References P1 Header H1 1 0 1 H1 2 0 1 Additional Quality Measures P1 Header H1 3 0 0 Relation Record Requirements P1 Header H1 4 0 0 Preplot Requirements P1 Header H1 5 0 0 Survey Perimeters P1 Header CC x x x P1 Header related Comments P1 Data P1 S1 R1 CRS1 Coordinate Resolution P1 Data P1 S1 R1 CRS2 Coordinate Resolution P1 Data P1 S1 R1 CRS3 Coordinate Resolution P1 Data CC x x x Data Related Comments P2 11 specific Header H2 and P2 Data
101. OGP OGP P1 1 1 0 1 2012 07 14 20 05 18 SNE 258 p111 EnSoCo Inc HC 0 1 0 Project Name PAWest PA Westmoreland 2010 08 01 HC 0 2 0 Survey Description Land Seismic 2D Pennsylvania USA 840 USA HC 0 3 0 Approximate Data Location 79 46 79 40 40 28 40 38 HC 0 4 0 Client Seismic Exchange Inc HC 0 5 0 Geophysical Contractor Seismic Exchange Inc 71 OGP P1 11 Geophysical position data exchange format user guide OGP HC 0 6 0 Positioning Contractor Seismic Exchange Inc HC 0 7 0 Position Processing Contractor Seismic Exchange Inc HC 1 0 0 Reference Systems Summary 5 0 5 1 HC 1 1 0 Unit of Measure 1 metre length 2 0 0 metre 9001 EPSG Dataset 7 6 9001 HC 1 1 0 Unit of Measure 2 radian angle 2 0 0 radian 9101 EPSG Dataset 7 6 9101 HC 1 1 0 Unit of Measure 3 degree angle 2 1 0 3 141592654 180 0 degree 9102 EPSG Dataset 7 6 9102 HC 1 1 0 Unit of Measure 5 US Survey Foot length 2 3 0 12 39 37 0 US Survey Foot 9003 EPSG Dataset 7 6 9003 HC 1 1 0 Unit of Measure 6 sexagesimal DMS angle 29 3 0 0 0 0 sexagesimal DMS 9110 EPSG Dataset 7 6 9110 HC 1 1 1 Example Unit Conversion 1 2 1 3 57 295779506 HC 1 1 1 Example Unit Conversion 2 1 1 5 3 280833333 HC 1 1 1 Example Unit Conversion 3 3 39 56 6 39 3336 HC 1 3 0 CRS Number EPSG Code Name Source 1 4455 NAD27 Pennsylvania South 7 9 2011 08 17 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4267 NAD27 7 9 2011 08 17 EPSG HC 1 3 0 CRS Number EPSG
102. OGP P1 11 Geophysical position data exchange format user guide I n t e r n a t I o n a l a s s o c I a t I o n o f o I l amp G a s P r o d u c e r s Report No 483 1u November 2012 To be read with Version 1 0 of the OGP P1 11 Geophysical position data exchange format Global experience The International Association of Oil amp Gas Producers has access to a wealth of technical knowledge and experience with its members operating around the world in many different terrains We collate and distil this valuable knowledge for the industry to use as guidelines for good practice by individual members Consistent high quality database and guidelines Our overall aim is to ensure a consistent approach to training management and best practice throughout the world The oil amp gas exploration amp production industry recognises the need to develop consistent databases and records in certain fields The OGP s members are encouraged to use the guidelines as a starting point for their operations or to supplement their own policies and regulations which may apply locally Internationally recognised source of industry information Many of our guidelines have been recognised and used by international authorities and safety and environmental bodies Requests come from governments and non government organisations around the world as well as from non member companies Disclaimer Whilst every effort has been made to ensure the accuracy of
103. Personal Geodatabase Feature Classes and ESRI File Geodatabase Feature Classes are both recommended imported exported to and from ESRI applications Note See www esri com E amp P Exploration amp Production of oil and natural gas geodetic data object GIGS a components part of the geodetic data model implemented in the software or the EPSG data model Example Geodetic data objects may be CRS coordinate transformation datum ellipsoid map projection coordinate system etc Note 1 The term EPSG geodetic data object in this documentation refers to geodetic data objects defined in the EPSG Dataset Note 2 See also geodetic parameter and parameter value geodetic parameter GIGS component part of a geodetic data object not itself a geodetic data object Note 1 This may be a parameter belonging to a coordinate conversion or coordinate transformation one of the defining parameters of an ellipsoid etc but it also refers to the attributes of a geodetic data object such as its name and the EPSG code of the object Note 2 Where the term EPSG geodetic parameter is used in this documentation geodetic parameters as defined in the EPSG Dataset are meant geocentric CRS OGP a geodetic CRS using an earth centred Cartesian 3D coordinate system the origin of a geocentric CRS is at the centre of mass of the Earth Note 1 Also known as ECEF Earth Centred Earth Fixed Note 2 Associated coordinate tuples c
104. REAMER DETAILS S1 1 1 1 H0104STREAMER DETAILS S2 1 2 2 H0104STREAMER DETAILS S3 1 3 3 H0104STREAMER DETAILS S4 1 4 4 H0104STREAMER DETAILS S5 1 5 5 H0104STREAMER DETAILS S6 1 6 6 H0104STREAMER DETAILS S7 1 7 7 H0104STREAMER DETAILS S8 1 8 8 H0104STREAMER DETAILS S9 1 9 9 H0104STREAMER DETAILS S10 1 A A H0105OTHER DETAILS N A H0200DATE OF SURVEY 01 August 2010 H0201DATE OF ISSUE POSTPLOT 03 September 2010 H0202TAPE VERSION IDENTIFIER UKOOA P1 90 H0203LINE PREFIX OCL H0300CLIENT Oil Company Limited H0400GEOPHYSICAL CONTRACTOR Oil Finder Inc H0500POSITIONING CONTRACTOR General Positioning Limited H0600POSITIONING PROCESSING Position Processing Limited H0700POSITIONING SYSTEM Orca Version 1 8 1 H0800SHOTPOINT POSITION MEAN CMP H0900OFFSET V1 TO SHOTPOINT 1 2 0 00 595 00 H2600SHOOTING POINT V1 MEAN CMP AT 0 0 100 0 H0901OFFSET V1 TO G1 1 2 25 00 390 00 H0902OFFSET V1 TO G2 1 2 25 00 390 00 H0903OFFSET V1 TO S1 1 2 450 00 700 00 H0904OFFSET V1 TO S2 1 2 350 00 700 00 H0905OFFSET V1 TO S3 1 2 250 00 700 00 H0906OFFSET V1 TO S4 1 2 150 00 700 00 H0907OFFSET V1 TO S5 1 2 50 00 700 00 H0908OFFSET V1 TO S6 1 2 50 00 700 00 H0909OFFSET V1 TO S7 1 2 150 00 700 00 H0910OFFSET V1 TO S8 1 2 250 00 700 00 H0911OFFSET V1 TO S9 1 2 350 00 700 00 H0912OFFSET V1 TO S10 1 2 450 00 700 00 H0913OFFSET V1 TO GPS V1G1 1 2 0 41 0 00 H0914OFFSET V1 TO GPS V1G2 1 2 0 43 0 00 H0915OFFSET V1 TO GPS V1R1 1 2 0 00 0 00 OGP 66 Inte
105. RS 13 14 4807 HC 1 4 4 Geodetic Datum Details The example shows how a geodetic datum would appear in record HC 1 4 4 It is required for geodetic geocentric and geographic and projected CRS types It is not required for vertical engineering or compound CRS types For compound CRSs the component horizontal and vertical CRSs are individually described and their details such as geodetic datum are given in those other descriptions HC 1 4 4 Geodetic Datum 1 6326 World Geodetic System 1984 HC 1 4 4 Geodetic Datum 2 6326 World Geodetic System 1984 HC 1 4 4 Geodetic Datum 3 6326 World Geodetic System 1984 HC 1 4 4 Geodetic Datum 4 6326 World Geodetic System 1984 HC 1 4 4 Geodetic Datum 9 6269 North American Datum 1983 HC 1 4 4 Geodetic Datum 11 6267 North American Datum 1927 HC 1 4 5 Prime Meridian Details In the majority of cases the prime meridian will be Greenwich in which case this record is considered implicit and is not essential to be recorded Greenwich is a general term taken to mean any prime meridian approximately passing through Greenwich including the IERS Reference 18 International Association of Oil amp Gas Producers OGP Meridian IRM A prime meridian other
106. Records P2 Header H2 0 0 0 H2 0 0 1 Acquisition Line Prefix Details P2 Header CC 2 0 0 Line Related Comments P2 Header H2 0 3 0 H2 0 3 1 H2 0 3 2 Magnetic Variation Information P2 Header H2 0 4 1 Speed of Sound Record Extension Fields P2 Header H2 0 5 0 H2 0 5 1 H2 0 5 2 Tidal Information P2 Header H2 5 4 0 Observation Definition Record Extension Fields P2 Header H2 5 5 0 Position Observation Record Extension Fields P2 Header H2 6 5 0 H2 6 6 1 GNSS Raw Data Recording Definition P2 Data CC x x x Event Related Comments 94 International Association of Oil amp Gas Producers OGP Bibliography 1 P1 90 Post Plot Data Exchange Format OGP http info ogp org uk geomatics Exchange P1 pdf 2 P2 94 Raw Marine Positioning Data Exchange Format OGP http info ogp org uk geomatics Exchange P2 pdf 3 Guidance Note 7 EPSG Geodetic Parameter Dataset http info ogp org uk geomatics guides index html 4 Guidance Note for Geodetic and Cartographic Applications Precision and Presentation APSG http www apsg info resources Documents APSG_Software_Guidelines pdf 5 Iliffe J and Lott R Datums and Map Projections for Remote Sensing GIS and Surveying Second Edition 2008 ISBN 978 1 4200 7041 5 USA only ISBN 978 1 904445 47 0 World except USA 6 ISO Standards http www iso org 95 OGP P1 11 Geophysical position data exchange format user guide OGP Glossary o
107. S 84 TM 132 SE MSL depth HC 1 4 1 Compound Horizontal CRS 4 1 WGS 84 TM 132 SE HC 1 4 2 Compound Vertical CRS 4 3 MSL depth OGP 60 International Association of Oil amp Gas Producers HC 1 4 0 CRS Number EPSG Code Type Name 5 4979 3 geographic 3D WGS 84 HC 1 4 4 Geodetic Datum 5 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 5 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 5 7030 WGS 84 6378137 298 257223563 1 metre HC 1 6 0 Coordinate System 5 6423 Ellipsoidal 3D CS 3 ellipsoidal 3 HC 1 6 1 Coordinate System Axis 1 5 1 108 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 5 2 109 Geodetic longitude east Long 3 degree HC 1 6 1 Coordinate System Axis 3 5 3 110 Ellipsoidal height up h 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 6 5714 5 vertical MSL height HC 1 4 7 Vertical Datum 6 5100 Mean Sea Level HC 1 6 0 Coordinate System 6 6499 Vertical CS 5 vertical 1 HC 1 6 1 Coordinate System Axis 1 6 1 114 Gravity related height up H 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 7 7 Compound Projected and Vertical WGS 84 TM 132 SE MSL height HC 1 4 1 Compound Horizontal CRS 7 1 WGS 84 TM 132 SE HC 1 4 2 Compound Vertical CRS 7 6 MSL height HC 1 7 0 Transformation Number EPSG Code Name Source 1 15593 geographic3D to geographic2D 7 6 2010 11 02 EPSG HC 1 8 0 Transformation Number EPSG Code Type Name 1 15593 2 conversion geographic3D to geographic2D HC 1 8 1 Source CRS
108. S HEAVE COMPENSATED H2600 12 SOURCE MAPPING G2 A 2 H2600 12 SOURCE MAPPING G1 B 1 H2600 13 STREAMER MAPPING A 1 S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 VT21021P1002 1 1001365847 20N01613 9 03W 391491 54093323 6 17 3246145623 ET21021P1002 1 1 1001365847 98N01613 8 70W 391500 24093347 5 17 3246145623 ZT21021P1002 11 1001365835 40N0161314 93W 391341 14092961 7 17 3246145623 ZT21021P1002 12 1001365836 16N0161316 72W 391297 24092985 7 17 3246145623 ST21021P1002 12 1001365836 16N0161316 72W 391297 24092985 7 17 3246145623 CT21021P1002 121 1001365827 94N0161310 96W 391436 34092730 5 17 3246145623 CT21021P1002 122 1001365828 71N0161312 74W 391392 64092755 0 17 3246145623 CT21021P1002 123 1001365829 49N0161314 52W 391349 04092779 4 17 3246145623 CT21021P1002 124 1001365830 26N0161316 29W 391305 34092803 9 17 3246145623 CT21021P1002 125 1001365831 04N0161318 07W 391261 64092828 3 17 3246145623 CT21021P1002 126 1001365831 81N0161319 85W 391218 04092852 7 17 3246145623 CT21021P1002 127 1001365832 59N0161321 63W 391174 44092877 2 17 3246145623 CT21021P1002 128 1001365833 36N0161323 41W 391130 74092901 7 17 3246145623 CT21021P1002 129 1001365834 14N0161325 18W 391087 04092926 1 17 3246145623 CT21021P1002 12A 1001365834 91N0161326 96W 391043 44092950 6 17 3246145623 TT21021P1002 1 1 1001365523 02N0161450 05W 388911 74087063 9 17 3246145623 TT21021P1002 1 2 1001365524 56N0161453 61W 388824 24087112 4 17 3246145623 TT21021P1002 1 3 1001365526 13N0161457 15W 388737 24087161 9 17 32
109. Source 3 5773 EGM96 geoid height 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 4 ELD79 UTM zone 32N EGM96 geoid height HC 1 3 0 CRS Number EPSG Code Name Source 5 4326 WGS 84 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 6 4979 WGS 84 7 6 2010 11 02 EPSG HC 1 4 0 CRS Number EPSG Code Type Name 1 2077 1 projected ELD79 UTM zone 32N HC 1 4 3 Base Geographic CRS 1 2 4159 HC 1 4 4 Geodetic Datum 1 6159 European Libyan Datum 1979 HC 1 4 5 Prime Meridian 1 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 1 7022 International 1924 6378388 1 metre 297 HC 1 5 0 Projection 1 16032 UTM zone 32N HC 1 5 1 Projection Method 1 9807 Transverse Mercator 5 HC 1 5 2 Latitude of natural origin 1 8801 0 3 degree HC 1 5 2 Longitude of natural origin 1 8802 9 3 degree HC 1 5 2 Scale factor at natural origin 1 8805 0 9996 4 unity HC 1 5 2 False easting 1 8806 500000 1 metre HC 1 5 2 False northing 1 8807 0 1 metre HC 1 6 0 Coordinate System 1 4400 Cartesian 2D CS 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 1 1 1 Easting east E 1 metre HC 1 6 1 Coordinate System Axis 2 1 2 2 Northing north N 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 2 4159 2 geographic 2D ELD79 HC 1 4 4 Geodetic Datum 2 6159 European Libyan Datum 1979 HC 1 4 5 Prime Meridian 2 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 2 7022 International 1924 6378388 1 metre 297 HC 1 6 0 Coordinate System 2 6422 Ellipsoi
110. Target CRS Version 1 5 4979 WGS 84 2 4326 WGS 84 HC 1 8 2 Transformation Method 1 9659 Geographic3D to 2D conversion 1 0 HC 1 9 0 Example Point Conversion 1 1 611175 42 9723630 80 2 2 50000000 133 0000000 61 OGP P1 11 Geophysical position data exchange format user guide OGP Number Mode Details 3 Land acquisition CRS WGS 84 geographic 3D postplot CRS ELD79 UTM zone 32N EPSG 2077 reduced heights orthometric heights above geoid reduced using EGM96 geoid model HC 1 0 0 Reference Systems Summary 6 0 6 3 HC 1 1 0 Unit of Measure 1 metre length 2 metre 9001 EPSG Dataset 7 6 9001 HC 1 1 0 Unit of Measure 2 radian angle 2 radian 9101 EPSG Dataset 7 6 9101 HC 1 1 0 Unit of Measure 3 degree angle 2 2 0 3 141592654 180 0 degree 9102 EPSG Dataset 7 6 9102 HC 1 1 0 Unit of Measure 4 unity scale 2 unity 9201 EPSG Dataset 7 6 9201 HC 1 1 0 Unit of Measure 5 arc second angle 2 2 0 3 141592654 648000 0 arc second 9104 EPSG Dataset 7 6 9104 HC 1 1 0 Unit of Measure 6 parts per million scale 2 4 0 1 1000000 0 parts per million 9202 EPSG Dataset 7 6 9202 HC 1 1 1 Example Unit Conversion 1 2 1 3 57 295779513 5 206264 806247097 HC 1 1 1 Example Unit Conversion 2 4 1 6 1000000 HC 1 3 0 CRS Number EPSG Code Name Source 1 2077 ELD79 UTM zone 32N 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4159 ELD79 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name
111. US Survey Foot HC 2 3 1 Crossline Distance Between Elements in the Pattern 6 11 10 5 US Survey Foot HC 2 3 1 Nominal Shot Depth 6 22 8 5 US Survey Foot HC 2 3 1 Length of Charge 6 23 1 5 US Survey Foot HC 2 3 0 Orica Seismic Explosive Range Osx 7 E2 7 Explosive Osx 8 Z HC 2 3 1 Polarity 7 1 SEG HC 2 3 1 Total Charge Size 7 2 4 4 21 pounds mass HC 2 3 1 Vertical Fold of Stack 7 5 1 HC 2 3 1 Number of Elements in Pattern 7 7 1 HC 2 3 1 Inline Dimension of Pattern 7 8 0 5 US Survey Foot HC 2 3 1 Crossline Dimension of Pattern 7 9 0 5 US Survey Foot HC 2 3 1 Inline Distance Between Elements in the Pattern 7 10 0 5 US Survey Foot OGP 86 International Association of Oil amp Gas Producers HC 2 3 1 Crossline Distance Between Elements in the Pattern 7 11 0 5 US Survey Foot HC 2 3 1 Nominal Shot Depth 7 22 25 5 US Survey Foot HC 2 3 1 Length of Charge 7 23 2 5 US Survey Foot HC 2 3 0 Orica Seismic Explosive Range Osx 8 E3 7 Explosive Osx 8 Z HC 2 3 1 Polarity 8 1 SEG HC 2 3 1 Total Charge Size 8 2 4 4 21 pounds mass HC 2 3 1 Vertical Fold of Stack 8 5 1 HC 2 3 1 Number of Elements in Pattern 8 7 1 HC 2 3 1 Inline Dimension of Pattern 8 8 0 5 US Survey Foot HC 2 3 1 Crossline Dimension of Pattern 8 9 0 5 US Survey Foot HC 2 3 1 Inline Distance Between Elements in the Pattern 8 10
112. a See www seg org link to Technical Standards SEG Y Seismic data recording format including position data Note current version is Rev 1 2002 Earlier versions may be important with legacy data See www seg org link to Technical Standards shape files shp format and associated files used for spatial data to store non topological geometry and attribute information for the spatial features in a data set The geometry for a feature is stored as a shape comprising a set of vector coordinates Used in conjunction with other essential files for data exchange Developed and regulated by ESRI Note current version July 1998 See http www esri com library whitepapers pdfs shapefile pdf southing OGP distance in a coordinate system southwards positive or northwards negative from an east west reference line Note 1 Southing is rarely encountered and is applicable only to south orientated coordinate systems and may be designated by e g S y or x Note 2 Definition from OGP Guidance Note 7 Part 1 Using the EPSG Geodetic Parameter Dataset with URL http www epsg org guides docs G7 1 pdf SPS SPS format SEG Technical Standards Committee on Ancillary Data Formats Shell Processing Support Format for Land 3 D Surveys 2006 Note Current version is SPS rev 2 1 See www seg org link to Technical Standards transformation See coordinate transformation true north See geographic north tuple ISO TC211 ordered l
113. a exchange format user guide OGP OGP P1 11 Geophysical position data exchange format user guide Report No 483 1u November 2012 Version Publication History Date 1 0 First Publication November 2012 iv International Association of Oil amp Gas Producers OGP Contents How to use this document 1 1 Preliminary Information 3 1 1 Introduction 3 1 2 General Format Information 4 1 3 Data Types 5 1 4 Reserved Characters 6 2 The Common Header Metadata Units and Reference Systems 7 2 1 Header Records Common to all P formats 7 2 2 Units of Measure HC 1 1 0 to HC 1 1 1 7 2 3 Time Reference Systems HC 1 2 0 to HC 1 2 1 9 2 4 Coordinate Reference Systems HC 1 3 0 to HC 1 6 1 9 2 4 1 Concepts and Definitions 9 2 4 2 CRS Implementation Strategy 12 2 4 3 Control of Positional Integrity 15 2 4 4 Coordinate Reference Systems Coding Summary 16 2 5 Coordinate Reference Systems Worked Examples 16 2 6 Coordinate Transformations Worked Examples 20 2 7 Record Grouping in the CRS Section 22 3 Common Header Survey Configuration 24 3 1 Production System Information 24 3 2 Receiver Information 24 4 Common Header Positioning Objects 25 5 Comment Records 25 6 P1 Format specific Header 26 6 1 P1 Header Position Record Definitions 26 6 1 1 Position Record Definitions Record Extension Fields 26 6 1 2 Position Recor
114. an 9101 EPSG Dataset 7 6 9101 HC 1 1 0 Unit of Measure 3 degree angle 2 2 0 3 141592654 180 0 degree 9102 EPSG Dataset 7 6 9102 HC 1 1 0 Unit of Measure 4 unity scale 2 unity 9201 EPSG Dataset 7 6 9201 HC 1 1 0 Unit of Measure 5 US survey foot length 2 1 0 12 39 37 0 US survey foot 9003 EPSG Dataset 7 6 9003 HC 1 1 1 Example Unit Conversion 1 1 1 5 3 280833333 HC 1 1 1 Example Unit Conversion 2 2 1 3 57 295779513 HC 1 3 0 CRS Number EPSG Code Name Source 1 32066 NAD27 BLM 16N ftUS 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4267 NAD27 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 3 5715 MSL depth 8 0 2012 08 10 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 4 NAD27 BLM 16N ftUS MSL depth HC 1 3 0 CRS Number EPSG Code Name Source 5 4269 NAD83 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 6 4326 WGS 84 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 7 4979 WGS 84 7 6 2010 11 02 EPSG HC 1 4 0 CRS Number EPSG Code Type Name 1 32066 1 projected NAD27 BLM 16N ftUS HC 1 4 3 Base Geographic CRS 1 2 4267 HC 1 4 4 Geodetic Datum 1 6267 North American Datum 1927 HC 1 4 5 Prime Meridian 1 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 1 7008 Clarke 1866 6378206 4 1 metre 0 HC 1 5 0 Projection 1 15916 BLM zone 16N US survey feet HC 1 5 1 Projection Method 1 9807 Transverse Mercator 5 HC 1 5 2 Latitude of natural origin 1 8
115. ance Between Elements in the Pattern 12 11 0 5 US Survey Foot HC 2 3 1 Nominal Shot Depth 12 22 25 5 US Survey Foot HC 2 3 1 Length of Charge 12 23 25 5 US Survey Foot HC 2 3 0 Orica Seismic Explosive Range Osx 13 E8 7 Explosive Osx 8 Z HC 2 3 1 Polarity 13 1 SEG HC 2 3 1 Total Charge Size 13 2 8 8 21 pounds mass HC 2 3 1 Vertical Fold of Stack 13 5 1 HC 2 3 1 Number of Elements in Pattern 13 7 1 HC 2 3 1 Inline Dimension of Pattern 13 8 0 5 US Survey Foot HC 2 3 1 Crossline Dimension of Pattern 13 9 0 5 US Survey Foot HC 2 3 1 Inline Distance Between Elements in the Pattern 13 10 0 5 US Survey Foot HC 2 3 1 Crossline Distance Between Elements in the Pattern 13 11 0 5 US Survey Foot HC 2 3 1 Nominal Shot Depth 13 22 35 5 US Survey Foot HC 2 3 1 Length of Charge 13 23 4 5 US Survey Foot HC 2 3 0 Input Output Air Gun Array 301 14 A1 4 Air Gun Sleeve Gun Model II HC 2 3 1 Polarity 14 1 SEG HC 2 3 1 Air Volume 14 4 2400 15 cubic inch HC 2 3 1 Vertical Fold of Stack 14 5 1 HC 2 3 1 Number of Elements in Pattern 14 7 16 HC 2 3 1 Inline Dimension of the Pattern 14 8 4 5 1 metre HC 2 3 1 Crossline Dimension of the Pattern 14 9 0 1 metre HC 2 3 1 Inline Distance Between Elements in the Pattern 14 7 0 1 metre HC 2 3 1 Crossline Distance Between Elements in the Pattern 14 8 0 1 metre HC 2 3 1 Nominal Air Pressu
116. ange format description OGP report number 483 1 referred to in this document as the P1 11 Format Description It provides additional guidance and detail around the writing application and use of the OGP P1 11 format and the user is encouraged to refer to both documents when writing or reading P1 11 files This User Guide is intended to provide context and examples to demonstrate various implementations of the format and does not attempt to duplicate the complete format description although there is inevitably some overlap in content Due to the use of hyperlinks between the 2 documents for optimum benefit it is recommended to access this material by computer rather than printed copy Where printing is necessary this document should be printed in colour to allow recognition of the use of colour coding in the text When printing note that for some of the Appendices the page orientation is landscape Hyperlinks are used to link topics in this User Guide to the relevant section of the P1 11 Format Description Hyperlinks are stored with relative path names for the links to remain unbroken the 2 files must be stored in the same folder Hyperlinks appear as text underlined in purple When referring to header record identifiers which are generally the first four fields in the header section they are written inside square brackets for example HC 0 1 0 Examples of records are frequently used to illustrate a point Where too long
117. aphic 3D vertical dimension is ellipsoidal height 4 Geocentric 5 Vertical 6 Engineering 7 Compound For the examples that follow descriptions of the contents of each field can be found in the corresponding section of the P1 11 Format Description HC 1 3 0 Coordinate Reference System Implicit Identification Common Header record HC 1 3 0 presents an at a glance summary of all the CRSs used in the file as they are listed en bloc in the order in which they are defined in the header Field 6 identifies the CRS internal file Reference Number CRSREF and if this designation follows a chronological sequence this block of records is representative of the derivation of the data A representative example of each of the above 7 CRS types would appear in record HC 1 3 0 as follows HC 1 3 0 CRS Number EPSG Code Name Source 1 32631 WGS 84 UTM zone 31N 7 6 2010 11 02 EPSG EPSG_v7_6 mdb HC 1 3 0 CRS Number EPSG Code Name Source 2 4326 WGS 84 7 6 2010 11 02 EPSG EPSG_v7_6 mdb HC 1 3 0 CRS Number EPSG Code Name Source 3 4979 WGS 84 7 6 2010 11 02 EPSG EPSG_v7_6 mdb HC 1 3 0 CRS Number EPSG Code Name Source 4 4978 WGS 84 7 6 2010 11 02 EPSG EPSG_v7_6 mdb HC 1 3 0 CRS Number EPSG Code Name Source 5 5715 MSL depth 8 0 2012 08 10 EPSG EPSG_v8_0 mdb HC 1 3 0 CRS Number EPSG Code Name Source 6 5818 OGP P6 seismic bin grid 8 0 2012 08 10 EPSG EPSG_v8_0 mdb HC 1 3 0 CRS Number EPSG Code Name Source 7 5498 NAD83 NAV
118. at which can be used to determine the correlation between the different formats and possibility for conversions A P1 11 file has the following basic structure A OGP file identification record OGP This is required by all Px 11 formats and comprises the first line in the file It contains basic metadata about the file such as format type P1 P2 etc and date time of writing and supports file versioning This allows for a minimum level of audit trail and file tracking from initial encoding through exchange modification processing and final archival B Common Header HC The OGP file identification record is followed by the Common Header containing the survey definition This part of the file contains header information that is common across all P formats P1 11 P2 11 P6 11 from the same survey It comprises 3 main sections a summary containing basic information to identify the survey definitions of units and reference systems used units of measure time and position reference systems and survey configuration information Each Common Header record begins with the HC identifier C P1 specific header section H1 This part of the file contains header information that is specific to the P1 11 format such as file contents and processing details and defines the positional framework for preplot survey perimeter and final position records and should follow directly after the Common Header Each P1 specific header record begi
119. at use of EPSG data Coordinate operation methods operate across various coordinate domains e g between geocentric CRSs between geographic 2D CRSs between projected CRSs etc For historic reasons 15 OGP P1 11 Geophysical position data exchange format user guide OGP and backward compatibility in the EPSG Dataset any coordinate transformations between geodetic CRSs geocentric geographic 3D or geographic 2D are always documented with geographic 2D CRSs as the source and target CRS regardless of the actual domain in which the transformation operates Applications are expected to deal with this through the implicit concatenated operation technique described in OGP Geomatics Guidance Note 7 part 1 see Bibliography However the strategy for populating CRSs is to give all three subtypes of geodetic CRS when they are part of a modern ITRS related CRS and only the geographic 2D CRS for classical survey control networks When it comes to documenting CRS and transformation data in the P format records then The geodetic CRS to be documented is that actually used in the data record coordinate fields The coordinate transformation s source and target CRS to be documented are those as given in the EPSG Dataset Thus the source or target geodetic CRS of a documented transformation may not match the CRS s coordinate system For example assume a survey was acquired using GPS in WGS 84 in geocentric Cartesian coordinates EPSG
120. bove examples only 2 coordinate tuples are given This is acceptable when the second CRS geographic CRS is already in the hub or reference CRS such as WGS 84 40 International Association of Oil amp Gas Producers OGP Appendix A Minimum Requirements by Records Group 1 Minimum file content requirements by records group for new acquisition Records Group Records New Marine Acquisition New Land Acquisition New TZ OBC Acquisition OGP Record OGP Mandatory Mandatory Mandatory Survey Definition HC 0 x x Mandatory Mandatory Mandatory Reference Systems Summary Information HC 1 0 0 Mandatory Mandatory Mandatory Unit Reference Systems HC 1 1 x Mandatory Mandatory Mandatory Time Reference Systems HC 1 2 x Mandatory Mandatory Mandatory Coordinate Reference Systems HC 1 3 9 x Mandatory Mandatory Mandatory Survey Configuration HC 2 0 0 Mandatory Mandatory Mandatory Production System Information HC 2 1 x Mandatory Mandatory Mandatory Receiver Information HC 2 2 x Mandatory Mandatory Mandatory Object Information HC 2 3 x Mandatory Mandatory Mandatory Comments CC x x x Optional Optional Optional P1 Header Content Definition H1 0 x x Mandatory Mandatory Mandatory P1 Header Position Definitions H1 1 2 x x Mandatory Mandatory Mandatory Relation Definition Records H1 3 0 0 X1 Optional Optional Optional Preplot Definition Records H1 4 0 0 N1 Optional O
121. cal Datum Details 4 5113 Sea Level HC 1 6 0 Coordinate System 4 Vertical CS Axis height Orientation down UoM ftUS 5 Vertical 1 HC 1 6 1 Coordinate System Axis 1 4 1 1 Depth down D 5 US survey foot HC 1 4 0 CRS Number EPSG Code Type Name 5 7 Compound Projected and Vertical Alaska zone 4 NGVD29 Height HC 1 4 1 Compound Horizontal CRS 5 1 NAD27 Alaska zone 4 HC 1 4 2 Compound Vertical CRS 5 3 NGVD29 Height HC 1 4 0 CRS Number EPSG Code Type Name 6 4269 2 geographic 2D NAD83 HC 1 4 4 Geodetic Datum 6 6269 North American Datum 1983 HC 1 4 5 Prime Meridian 6 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 6 7019 GRS 1980 6378137 1 metre 298 257222101 OGP 84 International Association of Oil amp Gas Producers HC 1 6 0 Coordinate System 6 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 6 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 6 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 7 5715 5 Vertical MSL depth HC 1 4 7 Vertical Datum 7 5100 Mean Sea Level HC 1 6 0 Coordinate System 7 Vertical CS Axis height Orientation down UoM ftUS 5 Vertical 1 HC 1 6 1 Coordinate System Axis 1 7 1 1 Depth down D 5 US survey foot HC 1 7 0 Transformation Number EPSG Code Name Source 1 1243 NAD27 to NAD83 2 7 9 2011 08 17 EPSG HC 1 8 0 Transformation Number EPSG Code Name 1 1243 NAD
122. centration 2 18 0 0 001 1 0 Dimensionless fraction POSC UOM Dictionary 2 2 ppk 2 Definition of the positioning object if the temperature salinity measurements are to be assigned to the position of the sensor probe 10 is its OBJREF a counter and 21 is its user defined OBJTYPEREF HC 2 3 0 Temperature Salinity Probe 10 TSDip 21 Sensor Probe Valeport 1 10 20 4 Aft Crane 3 Record extension field definition in the position record type header H1 1 0 0 Position Record Type Definition 1 1 2 3 1 1 2 100 water temperature 17 101 salinity 19 In the data records P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 2 G1 1 391341 12 4092961 71 15 5 35 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 G2 1 391297 20 4092985 78 15 5 35 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 25 T1 1 388911 73 4087063 99 15 5 35 36 International Association of Oil amp Gas Producers OGP 9 Handling the Vertical Dimension In seismic acquisition there is usually a requirement to document the location of the seismic object source receiver etc together with additional positional attributes such as water depth at the source location depth of seismic charge below land surface etc The vertical position of an object can be expressed as 1 a coordinate 2 a measurement or offset relative to a reference surface 3 a measurement or offset relative to an irregular or variable surface such as the land t
123. commended resolutions for various accuracies 29 OGP P1 11 Geophysical position data exchange format user guide OGP 7 2 P1 Data Records P1 S1 Position Record See Section 10 of the P1 11 Format Description P1 S1 position records consist of prescribed data fields which should all be populated if the data is available including record identifier P1 or S1 line name point number event time position object details position coordinates referred to 3 CRSs and position quality The format allows for additional user defined parameters to be written into the record using record extension fields 7 2 1 Positioning Object Details The object positioned can be real or virtual In the example below the first 3 data records are position records for a physical object and the following records are for virtual positions between 2 positioning objects Fields 9 OBJREF and 10 Object Short Name are underlined Text has been allowed to wrap round inset for readability S1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 G2 1 391297 20 4092985 70 36 97671040 16 22131009 36 97671040 16 22131009 2 2 1 2 154 2 1 2 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 2 G1 1 391341 10 4092961 70 36 97649917 16 22081351 36 97649917 16 22081351 2 8 1 1 164 4 1 1 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 G2 1 391297 20 4092985 70 36 97671040 16 22131009 36 97671040 16 22131009 2 1 1 4 174 7 0 9 P1 0 T21021P1002 1001 1 2010
124. d Definitions Quality Definition 26 6 2 P1 Header X1 Relation Record Definition 27 6 3 P1 Header N1 Preplot Position Record Definitions 27 6 4 P1 Header M1 Survey Perimeter Position Definition 27 v OGP P1 11 Geophysical position data exchange format user guide OGP 7 P1 Data Records 28 7 1 A Note on Data Resolution 28 7 2 P1 Data Records P1 S1 Position Record 29 7 2 1 Positioning Object Details 29 7 2 2 Position Coordinates 29 7 2 3 Position Quality 30 7 3 P1 Data Records R1 Receiver Position Record 32 7 4 P1 Data Records X1 Relational Record 32 7 5 P1 Data Records N1 Preplot Position Record 32 7 6 P1 Data Records M1 Survey Perimeter Position Record 33 8 Data Record Extension 34 9 Handling the Vertical Dimension 36 Appendix A Minimum Requirements by Records Group 40 Appendix B Coordinate Reference System and Coordinate Transformation Examples 42 Appendix C P1 11 Format Header Examples 56 Appendix D P1 11 Format Data Record Examples 63 Appendix E Examples of Legacy Formats converted to P1 11 65 Appendix F Client End User Checklist 92 Bibliography 94 Glossary of Terms 95 vi International Association of Oil amp Gas Producers OGP 1 OGP P1 11 Geophysical position data exchange format user guide OGP How to use this document This User Guide is a companion document to the OGP P1 11 Geophysical position data exch
125. d record extension fields Note on Land Data Quality Measures On land unlike marine there is no network being continually adjusted Instead every source and receiver point is usually individually measured This means that the error ellipse parameters are not normally a deliverable The latitude longitude and vertical error estimates obtained directly from the GNSS receiver plus estimates of the errors in measuring the antenna phase centre measurement point vector are used Error ellipses may be recorded for analysis purposes but typically the required deliverable is a 95 probability radial error estimate generated from the latitude amp longitude standard deviations and a similar vector error estimate for ellipsoidal height This corresponds directly with the geophysically driven positioning tolerance Consequently for land data records the error ellipse semi major axis is substituted by the radial error estimate and the error ellipse vertical axis optional for marine records is substituted by the height error estimate mandatory for land records Other fields in the position records remain blank Consideration of inconsistencies in the error estimates generated by GNSS receivers from different manufacturers is ongoing For this reason at this stage the theoretically correct detail of arriving at the 95 radial estimates is currently beyond the scope of this format but may be introduced in the future Note on Marine Data Quality Measures
126. dal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 3 5773 5 vertical EGM96 geoid height HC 1 4 7 Vertical Datum 3 5171 EGM96 geoid HC 1 6 0 Coordinate System 3 6499 Vertical CS 5 vertical 1 HC 1 6 1 Coordinate System Axis 1 3 1 114 Gravity related height up H 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 4 6 compound ELD79 UTM zone 32N EGM96 geoid height HC 1 4 1 Compound Horizontal CRS 4 1 ELD79 UTM zone 32N EGM96 geoid height HC 1 4 2 Compound Vertical CRS 4 3 ELD79 UTM zone 32N EGM96 geoid height HC 1 4 0 CRS Number EPSG Code Type Name 5 4326 2 geographic 2D WGS 84 OGP 62 International Association of Oil amp Gas Producers HC 1 4 4 Geodetic Datum 5 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 5 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 5 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 5 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 5 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 5 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 6 4979 3 geographic 3D WGS 84 HC 1 4 4 Geodetic Datum 6 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 6 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 6 703
127. detic Datum 4 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 4 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 4 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 4 6423 Ellipsoidal 3D CS 3 ellipsoidal 3 HC 1 6 1 Coordinate System Axis 1 4 1 108 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 4 2 109 Geodetic longitude east Long 3 degree HC 1 6 1 Coordinate System Axis 3 4 3 110 Ellipsoidal height up h 1 metre HC 1 7 0 Transformation Number EPSG Code Name Source 1 1864 SAD69 to WGS 84 1 7 6 2010 11 02 EPSG OGP 54 International Association of Oil amp Gas Producers HC 1 7 0 Transformation Number EPSG Code Name Source 2 15593 geographic3D to geographic2D 7 6 2010 11 02 EPSG HC 1 8 0 Transformation Number EPSG Code Name 1 1864 SAD69 to WGS 84 1 19 HC 1 8 1 Source CRS Target CRS Version 1 2 4618 SAD69 3 4326 WGS 84 DMA mean HC 1 8 2 Transformation Method 1 9603 Geocentric translations geog2D domain 1 3 HC 1 8 4 X axis translation 1 8605 57 1 metre 1 HC 1 8 4 Y axis translation 1 8606 1 1 metre 1 HC 1 8 4 Z axis translation 1 8607 41 1 metre 1 HC 1 8 0 Transformation Number EPSG Code Name 2 15593 geographic3D to geographic2D HC 1 8 1 Source CRS Target CRS Version 2 4 4979 WGS 84 3 4326 WGS 84 HC 1 8 2 Transformation Method 2 9659 Geographic3D to 2D conversion 1 0 HC 1 9 0 Example Point Conversion 1 1 4778202 13 9446775 26 2 5 00000000 56 00000000 3 5 00
128. dimensional ellipsoid and supports the recording of any supplementary quality attributes which are relevant to the position These would be defined by the writer or end user of the P1 11 file using standard record extension fields Some examples of these would be Unit Variance as an indication that the error ellipses are appropriately scaled degrees of freedom number of observations etc They should be selected 27 OGP P1 11 Geophysical position data exchange format user guide OGP sensibly and assigned to a relevant record type By way of example the header for a position record quality definition where unit variance is recorded in a record extension field would appear as follows user defined record extension identifiers for quality measures number from 100 H1 1 0 1 Position Record Quality Definition 1 95 Absolute Error Ellipses 1 3 1 100 Unit Variance 4 Once defined in the appropriate header record their values are stored as a field list in the Additional Quality Measures field 25 of the P1 S1 R1 position record 6 2 P1 Header X1 Relation Record Definition In situations where there is some independence of the source and receiver positions within a shot and it is necessary to link them together in processing the relational record X1 together with index numbers in the data records field 7 of S1 and R1 position records provide the means of position indexing and hence the appropriate grouping of sourc
129. directly supported Inclusion of the new method in the EPSG Dataset can be requested through the OGP Geodesy Subcommittee at http www epsg org Comms Comment asp or by general enquiry to the OGP Geomatics Committee at http info ogp org uk geomatics 19 OGP P1 11 Geophysical position data exchange format user guide OGP HC 1 5 2 Projection Parameter Details Projected CRS Only Header records HC 1 5 2 contain the defining parameters as required by the projection operation method For example five parameters are required for the Transverse Mercator map projection method and those for the UTM zone 31N projection would be HC 1 5 2 Latitude of natural origin 1 8801 0 3 degree HC 1 5 2 Longitude of natural origin 1 8802 3 3 degree HC 1 5 2 Scale factor at natural origin 1 8805 0 9996 4 unity HC 1 5 2 False easting 1 8806 500000 1 metre HC 1 5 2 False northing 1 8807 0 1 metre The Lambert Conic Conformal 1SP and 2SP map projection methods require 5 and 6 parameters respectively and the HC 1 5 2 records for France Lambert zone II and US Louisiana State Plane CS27 South Zone would be HC 1 5 2 Latitude of natural origin 13 8801 52 5 grad HC 1 5 2 Longitude of natural origin 13 8802 0 5 grad HC 1 5 2 Scale factor at natural origin
130. e 1866 EPSG Code 7008 ELLIPSOID SEMIMAJOR 6378206 400 1 FLATTENING 294 97869820 GRID UNITS USC amp GS Feet EPSG UNITS CODE 9003 GRID UNITS CONVERSION TO METERS 0 304800610 XY amp Height Elev units rounded to nearest whole unit lt LINE NAME 1D gt lt POINT gt R lt LAT gt lt LONG gt lt EAST X gt lt NRTH Y gt lt ELE gt 5NE 258 1 40170060N079241692W 1538364 350443 1043 0 5NE 258 2 40170295N079241612W 1538430 350679 1073 0 5NE 258 3 40170530N079241530W 1538499 350916 1075 0 5NE 258 4 40170765N079241447W 1538567 351153 1070 0 5NE 258 5 40170997N079241355W 1538643 351387 1082 0 5NE 258 6 40171231N079241264W 1538718 351622 1068 0 5NE 258 7 40171464N079241172W 1538793 351856 1088 0 5NE 258 8 40171695N079241080W 1538870 352089 1093 0 5NE 258 9 40171925N079240972W 1538957 352319 1097 0 5NE 258 10 40172147N079240840W 1539063 352543 1072 0 5NE 258 11 40172362N079240694W 1539181 352757 1064 0 5NE 258 12 40172570N079240532W 1539310 352966 1076 0 5NE 258 13 40172773N079240359W 1539448 353169 1074 0 5NE 258 14 40172962N079240162W 1539604 353358 1093 0 5NE 258 15 40173176N079240005W 1539730 353571 1084 0 5NE 258 16 40173411N079235936W 1539788 353808 1084 0 5NE 258 17 40173649N079235990W 1539751 354049 1065 0 5NE 258 18 40173879N079240093W 1539675 354283 1056 0 5NE 258 19 40174072N079235924W 1539810 354476 1037 0 5NE 258 20 40174225N079235679W 1540003 354628 1033 0 After conversion to P1 11 format this SEG P1 file would appear as follows
131. e CRS records in the Common Header these requirements will be adhered to by following the conditionality for each record and its fields Conditionality statements are placed immediately after each section header in section 5 3 of the P1 11 Format Description and appear as shown in the following example HC 1 4 3 Base Geographic CRS Details Mandatory when CRS type is projected Shall not be given for any other CRS type Coordinate Operation Method Formula A coordinate operation is determined by its formula Names alone are ambiguous for example the map projection name Oblique Stereographic is associated with different formula these resulting in output coordinates being significantly different can be 100 s of metres These outputs are not right or wrong they are just different But what is erroneous is to apply one of these formulas to an area where the other formula has been adopted The EPSG Dataset and OGP Geomatics Guidance Note 7 part 2 see Bibliography have formally documented the formula for each method including the parameters that are variables in the formulae and coordinate conversion and coordinate transformation parameter values in the EPSG Dataset are consistent with the documented method Although the EPSG Dataset includes most geodetic data required for oil and gas operations worldwide because it cannot be guaranteed to carry everything the P formats allow user defined map projections and coordinate transformations
132. e Unit Conversion 5 14 1 15 61023 98243 HC 1 1 1 Example Unit Conversion 6 16 1 17 0 00001 HC 1 1 1 Example Unit Conversion 7 18 1 19 0 0001450377439 HC 1 1 1 Example Unit Conversion 8 1 1 5 3 2808333333333 HC 1 1 1 Example Unit Conversion 9 20 1 21 2 2046226218 HC 1 2 0 Time Reference System 1 1 0 UTC 0 7 HC 1 3 0 CRS Number EPSG Code Name Source 1 26734 NAD27 Alaska zone 4 7 9 2011 08 17 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4267 NAD27 7 9 2011 08 17 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 3 5702 NGVD29 height 7 9 2011 08 17 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 4 5831 sea level depth 7 9 2011 08 17 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 5 NAD27 Alaska zone 4 NGVD29 height CC 1 0 0 Note For Offshore surveys at MSL NAD83 is considered functionally equivalent to WGS84 HC 1 3 0 CRS Number EPSG Code Name Source 6 4269 NAD83 7 9 2011 08 17 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 7 5715 MSL depth 7 9 2011 08 17 EPSG HC 1 4 0 CRS Number EPSG Code Type Name 1 26734 1 Projected NAD27 Alaska zone 4 HC 1 4 3 Base Geographical CRS 1 2 4267 HC 1 4 4 Geodetic Datum 1 6267 North American Datum 1927 HC 1 4 5 Prime Meridian 1 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 1 7008 Clarke 1866 6378206 4 1 metre 294 97869820 HC 1 5 0 Map Projection 1 15004 Alaska CS27 zone 4 HC 1 5 1 Projection Method 1 9807 Transverse Mercator 5 HC 1 5 2 Lati
133. e and receivers belonging to the same source event P1 header H1 3 0 0 sets up definitions for storage of required record extension fields in the relational records 6 3 P1 Header N1 Preplot Position Record Definitions The P1 11 format supports the exchange of preplot information enabling preplots to be imported directly into the integrated navigation system Header record H1 4 0 0 contains the defining metadata for a preplot N1 record including the definition of 2 CRSs for storage of the position data in a projected or compound CRS CRS 1 and the base geographic CRS of CRS 1 The format supports preplots where point data are required such as for a 4D survey or where various line types straight line segments arc and spiral segments are sufficient Options for additional preplot requirements can be defined by using record extension fields in the header The preplot coordinates can be linked to a physical position the object s OBJREF reference or a logical position being a non specific reference such as the midpoint between two source arrays 6 4 P1 Header M1 Survey Perimeter Position Definition There is scope in the P1 11 format to describe the areal limits of a survey or any other polygon This can be either an intended limit of some kind as part of the preplot definition or an actual surveyed area to be combined with the postplot data Header record H1 5 0 0 contains the defining metadata for a survey perimeter reco
134. e sea level with respect to the Caspian Sea Datum surface 38 International Association of Oil amp Gas Producers OGP Offshore vertical relationships are demonstrated in the following diagram Vertical Datum Surface Water Surface Object being positioned The sign of the vertical component values depends on the CRS axis definition Surface Height Reduced Water Depth Vertical Coordinate Point Depth Measured Water Depth Figure 5 Marine Vertical Datum Relationships Dynamite charge d a1 Vertical Datum Surface Water Surface Land Surface seabed a Point height a1 Surface height b Instantaneous water depth c Surface tidal height d Charge depth e Point depth f Reduced water depth Surface Source Receiver Source Receiver in water Buried Source Receiver Airgun array a e f b c Figure 6 Land TZ Vertical Datum Relationships Onshore nearshore relationships are demonstrated in the following diagram Figure 6 depicts a transition zone survey where the acquisition technique goes from vibroseis on the left surface source to OBC to buried source dynamite along the same seismic line On land it is required to record surface height a at the vibroseis point depth below topographic surface of the dynamite charge d and surface height at the charge position a1 In the nearshore section it is required to record water depth at the receiver b and
135. ed quality figures then an appropriate comment flag should be inserted in the header and such reservations preferably be echoed in the additional quality measure definition The user defined additional quality parameters numbering from 100 are available for this It is accepted that it is impractical to account for all eventualities regarding the determination of quality measures particularly in these scenarios but this should in no way be allowed to detract from the overall value of their inclusion See first example in Appendix C for an example of the utilisation of position record quality measures and additional quality field extensions for a marine towed streamer P1 11 7 3 P1 Data Records R1 Receiver Position Record See Section 10 2 of the P1 11 Format Description The first receiver in a position record contains the same fields as P1 S1 position records and these should be populated to the extent the data is available For subsequent receivers in the same record before the carriage return line feed only the first coordinate tuple is required and its associated quality attributes The P1 11 Format Description contains full details of which fields are repeated for subsequent receivers 7 4 P1 Data Records X1 Relational Record See Section 10 3 of the P1 11 Format Description Relation records define which receiver groups were being recorded into which recording channels at a specific shot For each source event there is at least one r
136. ee HC 1 4 6 Ellipsoid 4 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 4 6423 Ellipsoidal 3D CS 3 ellipsoidal 3 HC 1 6 1 Coordinate System Axis 1 4 1 108 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 4 2 109 Geodetic longitude east Long 3 degree HC 1 6 1 Coordinate System Axis 3 4 3 110 Ellipsoidal height up h 1 metre HC 1 7 0 Transformation Number EPSG Code Name Source 1 1530 NAD27 to WGS 84 30 7 6 2010 11 02 EPSG HC 1 7 0 Transformation Number EPSG Code Name Source 2 15593 geographic3D to geographic2D 7 6 2010 11 02 EPSG HC 1 8 0 Transformation Number EPSG Code Name 1 1530 NAD27 to WGS 84 30 3 HC 1 8 1 Source CRS Target CRS Version 1 2 4267 NAD27 3 4326 WGS 84 ICH Cub HC 1 8 2 Transformation Method 1 9603 Geocentric translations geog2D domain 1 3 HC 1 8 4 X axis translation 1 8605 4 2 1 metre 1 HC 1 8 4 Y axis translation 1 8606 135 4 1 metre 1 HC 1 8 4 Z axis translation 1 8607 181 9 1 metre 1 HC 1 8 0 Transformation Number EPSG Code Name 2 15593 geographic3D to geographic2D HC 1 8 1 Source CRS Target CRS Version 2 4 4979 WGS 84 3 4326 WGS 84 HC 1 8 2 Transformation Method 2 9659 Geographic3D to 2D conversion 1 0 HC 1 9 0 Example Point Conversion 1 1 1477744 46 852351 55 2 31 00000000 93 00000000 3 31 00018900 93 00015560 51 OGP P1 11 Geophysical position data exchange format user guide OGP Number Example Details 6 Projected CRS Tra
137. egree HC 1 5 2 Scale factor at natural origin 1 8805 0 9996 4 unity HC 1 5 2 False easting 1 8806 500000 1 metre HC 1 5 2 False northing 1 8807 0 1 metre HC 1 6 0 Coordinate System 1 4400 Cartesian 2D CS 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 1 1 1 Easting east E 1 metre HC 1 6 1 Coordinate System Axis 2 1 2 2 Northing north N 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 2 4230 2 geographic 2D ED50 HC 1 4 4 Geodetic Datum 2 6230 European Datum 1950 57 OGP P1 11 Geophysical position data exchange format user guide OGP HC 1 4 5 Prime Meridian 2 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 2 7022 International 1924 6378388 1 metre 297 HC 1 6 0 Coordinate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 3 5715 5 vertical MSL depth HC 1 4 7 Vertical Datum 3 5100 Mean Sea Level HC 1 6 0 Coordinate System 3 6498 Vertical CS 5 vertical 1 HC 1 6 1 Coordinate System Axis 1 3 1 113 Depth down D 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 4 6 compound ED50 UTM zone 28N MSL depth HC 1 4 1 Compound Horizontal CRS 4 1 ED50 UTM zone 28N MSL depth HC 1 4 2 Compound Vertical CRS 4 3 ED50 UTM zone 28N MSL depth HC 1 4 0 CRS Number EPSG Code Type Name 5 5 vertical SL depth HC 1
138. elation record Each of these records specifies a section of consecutively numbered channels and receiver groups After a numbering gap or a change in line name for the receiver groups a new relation record has to be given see example in section 10 3 of the P1 11 Format Description 7 5 P1 Data Records N1 Preplot Position Record See Section 10 4 of the P1 11 Format Description Each block of position records is preceded by a record N1 0 containing the line details name first amp last point number etc Preplot position records are prefixed by the identifier N1 n where n is an identifier referring to the preplot line type Preplot line types have the following identifiers recorded in field 2 of the position record 1 Point record 2 Straight line segment record 3 Arc segment record 4 Spiral segment record Examples of use of each type are given in the P1 11 Format Description in section 11 3 33 OGP P1 11 Geophysical position data exchange format user guide OGP 7 6 P1 Data Records M1 Survey Perimeter Position Record See Section 10 5 of the P1 11 Format Description This record can be used for defining the perimeter of the survey area and any other relevant polygon Each data record contains a point number an identifier defining the type of line joining it to the next point and coordinate tuples in CRS 1 amp 2 The second coordinate tuple is a requirement for the first point and optional for the sec
139. en a unique reference number OBJREF and a short name OBJNAME for ease of readability A list of object types OBJTYPEREF codes is prescribed see Table 14 in the P1 11 Format Description but the user may add additional types if required OBJTYPEREF 21 onwards Objects can be defined with a nominal position relative to another object using across along above offsets in the right handed Cartesian coordinate frame of the parent object which allows the survey configuration to be described Table 15 in the P1 11 Format Description contains a list of prescribed object attributes for use in HC 2 3 1 but the user is also able to add additional user defined attributes OBJATTREF 100 onwards The examples below demonstrate how to construct a positioning object HC 2 3 0 header record The first object has a pre defined OBJTYPEREF code 1 and OBJTYPE Vessel from Table 14 The second example has a user defined OBJTYPEREF code 21 and OBJTYPE SV Sensor HC 2 3 0 MV SeisFinder 1 V1 1 Vessel 1 amp 2 NRP 8 3 6 HC 2 3 0 Continuous Sound Velocity Profiler 15 SVP1 21 SV Sensor MVP 1 10 30 4 Aft crane 5 Comment Records Additional information not captured by standard records in the Common Header and data record sections of the document can be added using the prefix CC They should be included as close as possible to the data items to which they refer The use of
140. enwich 0 3 degree HC 1 4 6 Ellipsoid 1 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 5 0 Projection 1 16732 TM 132 SE HC 1 5 1 Projection Method 1 9807 Transverse Mercator 1 5 HC 1 5 2 Latitude of natural origin 1 8801 0 3 degree HC 1 5 2 Longitude of natural origin 1 8802 132 3 degree HC 1 5 2 Scale factor at natural origin 1 8805 0 9996 4 unity HC 1 5 2 False easting 1 8806 500000 1 metre HC 1 5 2 False northing 1 8807 10000000 1 metre HC 1 6 0 Coordinate System 1 4400 Cartesian 2D CS 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 1 1 1 Easting east E 1 metre HC 1 6 1 Coordinate System Axis 2 1 2 2 Northing north N 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 2 4326 2 geographic 2D WGS 84 HC 1 4 4 Geodetic Datum 2 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 2 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 2 7030 WGS 84 6378137 298 257223563 1 metre HC 1 6 0 Coordinate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 3 5715 5 vertical MSL depth HC 1 4 7 Vertical Datum 3 5100 Mean Sea Level HC 1 6 0 Coordinate System 3 6498 Vertical CS 5 vertical 1 HC 1 6 1 Coordinate System Axis 1 3 1 113 Depth down D 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 4 7 Compound Projected and Vertical WG
141. er network in response to dynamic motion of the spread This is not to say that certain test statistics cannot vary in a random manner The following settings are recommended for the statistical testing of the least squares estimation and the scaling and aspect ratio of the resulting error ellipse The actual values used will be stored in the header record H1 0 2 0 File Contents Attributes Parameter Recommended value Level of significance 0 1 Detection power 0 1 0 80 Critical value w test 2 576 Scale factor 95 error ellipse 2D 2 448 Scale factor 95 error ellipsoid 3D 2 796 P1 11 broadens the scope of integrity checking and quality measures in comparison with earlier P formats by allowing for the recording of a horizontal error ellipse along with optional additional definitions permitting the recording of any supplemental quality attributes relevant to the position in each record It is recognised that quality measures for a single point have limitations depending on the sensors and methodology adopted and time of their use It is also recognised that in marine towed streamer acquisition the positioning network solution inevitably forms a representation of the towed spread around the time of the source firing rather than at any simultaneous occurrence Whilst it is appreciated that it may never be possible to make like with like comparisons between all surveys as this would require standardisation and
142. erived from the geographic 3D CRS the base CRS Through this modelling the geodetic datum and its components ellipsoid prime meridian for the geocentric CRS are inherited by the two geographic CRSs but the CRSs have different coordinate systems The geodetic datum and its components must be documented as part of all geodetic CRS descriptions in HC 1 4 4 through HC 1 4 6 In general when describing or identifying a derived geodetic CRS it is not necessary to document its base CRS or the conversion used in its derivation However when the file specifies the explicit use of both base and related derived geodetic CRSs for example where raw position is being logged in the base geodetic CRS say WGS 84 geographic 3D and being transformed through the derived CRS WGS 84 geographic 2D it is essential to document both base and derived geodetic CRS and to document the conversion between them using HC 1 7 0 and HC 1 8 n records ii Projected CRSs sometimes colloquially referred to as map grids are derived from a base Geographic 2D CRS defined in HC 1 4 3 The derivation is through a special case of a coordinate conversion a map projection However this is not described as a coordinate operation between base geographic CRS and derived projected CRS as described in figure 3 above Conceptually a projected CRS is considered to have three components datum coordinate system and map projection and all three are considered pa
143. ert stk fold E7 4 4Lb 1 H822Nunits len X width Y E7 1 0Ft 0Ft 77 OGP P1 11 Geophysical position data exchange format user guide OGP H823Unit spacing X Y E7 0Ft 0Ft H831Nom shot depth charge len E7 25Ft 2Ft H832Nom soil drill method H833Weathering thickness H834Spare H835Spare H840Type model polarity E8 Explosive OSX 8Z SEG H841Size vert stk fold E8 8 8Lb 1 H842Nunits len X width Y E8 1 0Ft 0Ft H843Unit spacing X Y E8 0Ft 0Ft H851Nom shot depth charge len E8 35Ft 4Ft H852Nom soil drill method H853Weathering thickness H854Spare H855Spare H990R S X file quality control H991Coord status final prov Final H26 H26 Source of coordinates 1st Layout Index 1 H26 Land Shots Extreme Surveys Postplot H26 Marine Shots Ensoco Postplot H26 Land Nodes Line 102 Sta 1001 1613 Extreme Surveys Postplot H26 Marine Nodes Line 102 Sta 1615 1977 Ensoco Postplot H26 Land Receivers Line 111 Sta 1001 1629 Extreme Surveys Postplot H26 Marine Receivers Line 111 Sta 1631 1717 Extreme Surveys Postplot H26 Marine Receivers Line 111 Sta 1719 1975 NCS Drop Locations H26 H26 Source of coordinates 2nd Layout Index 2 H26 Land Shots Extreme Surveys Postplot H26 Marine Shots Ensoco Postplot H26 Land Nodes Line 102 Sta 1001 1613 Extreme Surveys Postplot H26 Marine Nodes Line 102 Sta 1615 1977 Ensoco Postplot H26 Land Receivers Line 111 Sta 1001 1629 Extreme Surveys Postplot H26 Marine Receivers Line 111 Sta 1631 1659 Extreme Surveys P
144. example preplots boundary information obstructions etc While some position data types are directly defined within this document and pertain to seismic acquisition other data may be exchanged using this format merely by complying with the structures and definitions available In fact some positions previously defined explicitly by position type are now enabled using object identification and coding This extends the possibilities for positional information as well as removing ambiguity found in implementations of other formats e g P2 94 P6 98 SEG P1 etc Note that the P1 11 format does not support the exchange of bin centre position data formerly Q records in P1 90 These are now incorporated in the P6 11 format as B6 records While the key position data types such as source and receiver remain directly referenced by a position type identity the format is extensible by allowing user defined objects and attributes The user is allowed through proper construction of the defining values in the headers to define position objects and to incorporate additional information fields within existing or newly defined record types A basic premise behind the P1 11 format is that a unique relationship exists between the individual data records and the mandatory as well as optional header elements associated with them Because of the flexibility of adding records and data within them it is a key requirement that the header or metadata must be retained
145. f Terms The following terms and acronyms are used throughout this publication and are defined here for clarity The use of italics in the definition column refers to another term in the Glossary Additional text providing clarification of the definition or an example are shown in smaller font The source of the definition is indicated in italics and square brackets where relevant and when the source is used several times The following sources are used GIGS Definition as applied to the term in the OGP GIGS documentation OGP Report 430 ISO TC211 Definition from ISO TC211 website or the ISO TC211 Multi Lingual glossary of terms http www isotc211 org TC211_Multi Lingual_Glossary 2010 06 06_Published xls NGA Definition from National Geospatial Intelligence Agency See www1 nga mil OGP Definition from the International Association of Oil and Gas Producers term definition accuracy ISO TC211 closeness of agreement between a test result and the accepted reference value affine operation GIGS coordinate operation on plane coordinates involving an origin shift and separate rotations and or scale unit changes affecting the two axes Note This type of operation is often called an affine transformation but it may exist either as a coordinate conversion or as a coordinate transformation In the first case the operation parameters have defined values such as with a seismic bin grid in the second case t
146. ferent datums From a purely mathematical perspective these are similar and are collectively referred to as coordinate operations The coordinate operation acts on coordinates It changes the CRS to which coordinates are referenced but it does not change any CRS definitions For the purposes of the P formats the coordinate reference system discussion includes i the definition of all CRSs involved in the position data given in the file and ii the definition of all transformations used to change coordinate values between these CRSs There is scope in the format for any number of CRSs and transformations to be defined All data in the position records of a P1 11 file will be referenced to at least one universal CRS this being the default or the contractually deliverable CRS This can be a 3 dimensional system or a compound system or separately defined horizontal and vertical systems There is scope in the format for position objects to be referenced to up to 3 CRSs The CRS section of the Common Header should include the full positional history of the records for example the field acquisition CRS and the transformation parameters used to convert between this and the client s required delivery CRS If for regulatory or other reasons the data is later required to be exported to another CRS details of this should be included in the exported file with comment records to describe the context and CRS numbering reflecting the chronological
147. g the Earth and the manmade features on the earth that can be shown on maps navigation charts and images Note Geospatial data includes a coordinate dataset and its geospatial metadata geospatial integrity GIGS the extent to which geospatial data are complete correct consistent and verifiable Note Geospatial integrity applies to the software functions that address data import creation merging processing coordinate operations amp map projections visualisation and export It is therefore more than a static property of geospatial data geospatial metadata GIGS the CRS to which the coordinate dataset is referenced extended by the definition of any coordinate operations when relevant Note Coordinate operation information is relevant when the geospatial data was originally collected in a different CRS It is not relevant when the geospatial data is not going to be merged with geospatial data that is referenced to another CRS GeoTIFF Data exchange format for georeferenced raster imagery Current version v1 0 Note See http trac osgeo org geotiff GIGS OGP a Joint Industry Project under the auspices of OGP JIP 24 created to produce industry guidelines for the evaluation of the capabilities of geoscience software regarding geospatial integrity GIGS Guidelines OGP public release products from the GIGS Joint Industry Project published as OGP Publications 430 1 430 2 and 430 3 Note See www ogp org uk
148. hese values are empirically determined from survey data such as for an engineering plant grid ASCII American Standard Code for Information Interchange Note See www ascii cl audit trail GIGS the facility provided by a software package to permit independent review and verification of the integrity of its datasets by tracking and logging each of the operations performed on the dataset auxiliary metadata GIGS data captured to support the Audit Trail in particular data about all coordinate operations conversions amp map projections coordinate transformations and CRS applied to the geoscience dataset over time from its original CRS through to the final CRS used in each module azimuth GIGS angle between the north reference and the direction from a point to another point clockwise positive Note The north reference may be grid north true north magnetic north or local north base geographic CRS GIGS geographic CRS from which a projected CRS is defined by applying a map projection to the associated geographical coordinates Cartesian coordinate system ISO TC211 coordinate system that gives the position of points relative to n mutually perpendicular axes compliance GIGS agreement to a norm either precisely or within an acceptable tolerance Note Compliance may refer to terminology as e g specified in ISO 19111 or the EPSG Dataset in which case agreement needs to be precise or it may refer to numerical
149. ic 3D CRS OGP a geodetic CRS using a 3D ellipsoidal 3D coordinate system where ellipsoidal height is defined Note 1 Used when positions of features are described on above or below the surface of the ellipsoid through latitude and longitude coordinates and ellipsoidal height Note 2 Definition from OGP Guidance Note 7 Part 1 Using the EPSG Geodetic Parameter Dataset with URL http www epsg org guides docs G7 1 pdf geographic CRS OGP collective term for any geodetic CRS using an ellipsoidal model of the Earth See geographic 2D CRS and geographic 3D CRS geographic north GIGS direction from a given location pointing towards the Geographic North Pole Note See also True North geoid ISO TC211 equipotential surface of the Earth s gravity field which is everywhere perpendicular to the direction of gravity and which best fits mean sea level either locally or globally geomatics Geomatics Engineering is an emerging information technology in the 21st Century Geomatics deals with the acquisition modelling analysis and management of spatial data and includes exciting applications such as positioning by satellites remote sensing land surveying and geospatial information management Note 1 It includes all forms of land amp hydrographic surveying positioning mapping amp boundary determination and is based on the scientific framework of geodesy applying modern technologies such as GIS photogrammetry terra
150. ies in the direction of lowest precision highest standard deviation and conversely the semi minor axis shows the direction in which the fix is strongest These directions do not necessarily coincide with the directions of the coordinate axes eg north south and east west Ideally the ratio between semi major and semi minor axes should not exceed two Note that the probability figure associated with a one sigma ellipse is 39 4 which is significantly smaller than the 68 26 associated with a one dimensional standard deviation The reason for this is that error ellipses are making statements about the precision of the position in two dimensions Error ellipse axes are commonly drawn at a scale 2 448 times their one sigma values and are referred to as being 95 confidence regions When the error ellipse is drawn at a confidence level of 95 the recommended value then there is 95 chance that the estimated position lies within the ellipse which is centred at the true position It should be emphasised that standard deviations and error ellipses are not measures of the actual errors they simply describe the populations from which the errors come They therefore should only change suddenly when that population changes for example if a new satellite is tracked Otherwise they should change only very slowly reflecting the gradual change in the geometry of the satellite constellation with respect to the receiver s antenna or the source receiv
151. in modelling and cartography Note 2 Definition by University of Calgary Department of Geomatics Engineering See www geomatics ucalgary ca about Geomatics Committee OGP OGP Geomatics Committee One of ten standing committees of the OGP comprised of leading specialists in the areas of surveying geodesy cartography and spatial data management Note The OGP Geomatics Committee aims to help members by Developing and disseminating best practice through Guidelines of relevance in the fields of geodesy surveying and positioning Providing a forum for exchanging experiences and knowledge Influencing regulators and standards organisations Maintaining international positioning exchange formats and a geodetic parameter database known as EPSG Geodetic Parameter Dataset Liaising with industry associations Note See http info ogp org uk geodesy geoscience GIGS all scientific disciplines relating to studies of the subsurface including Geology Geophysics Geodesy Geomatics Geotechnical studies and others 100 International Association of Oil amp Gas Producers OGP term definition geoscience software GIGS any computer package used in geoscience activities including applications along with their user interfaces processing packages and underlying databases also included as applications are geodetic data engines extensions and middleware geospatial data NGA data concernin
152. into a record stored as a floating point number and should be truncated commensurate with its accuracy 6 International Association of Oil amp Gas Producers OGP 1 4 Reserved Characters The following 4 characters are integral to the format as entity separators and therefore cannot be used elsewhere with the exception of comment records Comma ASCII Code 44 Used to separate fields Semi Colon ASCII Code 59 Used to separate sub fields in a Standard Record Extension Definition and Record Extension Fields see Section 2 7 of the P1 11 Format Description Colon ASCII Code 58 Used to separate items in Date and Time fields Ampersand amp ASCII Code 38 Used to separate items in a Variant List Variant Lists are only used for data record fields which contain a variable number of items a good example is the GNSS satellites used field from the P2 11 format where the satellite SV numbers are listed as in 5 amp 6 amp 7 amp 8 etc 7 OGP P1 11 Geophysical position data exchange format user guide OGP 2 The Common Header Metadata Units and Reference Systems The P1 11 header records provide fundamental information about the data contained within the file The subset which is replicated across P1 11 P2 11 and P6 11 formats for the same survey is called the Common Header Additionally each P format has format specific header records for example the P1 format has a set of specific header record
153. is 3 3 3 110 Ellipsoidal height up h 3 degree Cartesian for projected CRS HC 1 6 1 Coordinate System Axis 1 1 1 1 Easting east E 1 metre HC 1 6 1 Coordinate System Axis 2 1 2 2 Northing north N 1 metre Vertical CS for offshore land vertical CRS HC 1 6 1 Coordinate System Axis 1 5 1 113 Depth down D 1 metre HC 1 6 1 Coordinate System Axis 1 10 1 114 Gravity related height up H 1 metre As vertical coordinate systems are one dimensional the value in the Coordinate Order field will always be 1 In records in the data section of the file coordinates are ordered in accordance with Table 9 of the format specification a vertical coordinate is always in the third field of the coordinate tuple 2 6 Coordinate Transformations Worked Examples Sections HC 1 7 0 and HC 1 8 n contain the parameters required to transform coordinates between the coordinate reference systems defined in the Common Header The direction of transformation is fixed by defining source CRS and target CRS for each transformation in HC 1 8 1 HC 1 7 0 Coordinate Transformation Implicit Identification Common Header record HC 1 7 0 presents an at a glance summary of all the coordinate transformations used in the file as they are listed en bloc in the order in which they are defined in the header Field 6 identifies the coordinate
154. ismic post plot positioning data exchange format previously established by UKOOA and currently maintained by OGP Note Current version is P1 11 but the P1 84 version is still important with legacy data See www epsg org p formats html P1 90 OGP Industry standard seismic post plot positioning data exchange format previously established by UKOOA and currently maintained by OGP Note 1 Current version is P1 11 but P1 90 version is still important with legacy data See www EPSG org p formats html Note 2 Q records are utilised for bin centre input data in 3D seismic surveys even though such records do not represent the final navigation bin centre locations P1 11 OGP Industry standard geophysical positioning data exchange format scheduled for release by OGP Geomatics Committee Q4 2011 Note See www EPSG org p formats html P2 94 OGP Industry standard seismic raw positioning data exchange format previously established by UKOOA and currently maintained by OGP Note Current version is P2 11 but P2 94 version is still important with legacy data See www EPSG org p formats html P2 11 OGP Industry standard geophysical raw positioning data exchange format scheduled for release by OGP Geomatics Committee Q4 2011 Note See www EPSG org p formats html P5 94 OGP Industry standard pipeline position data exchange format previously established by UKOOA for use on the UKCS and currently maintained by OGP Note 1 Current ve
155. ist of values Note See also coordinate tuple TVD True Vertical Depth the vertical distance from a point in the well usually the current or final depth to a point at the surface usually the elevation of the rotary kelly bushing RKB Note 1 See www glossary oilfield slb com Note2 The vertical CRS of a TVD value is a 1D engineering CRS of which the positive axis points down its direction coinciding everywhere with the vector of gravity TVDBML TVD below Mud Line for well data term definition TVDSS TVD sub sea below sea level for well data UKOOA United Kingdom Offshore Oil and Gas Industry Association trading as Oil amp Gas UK was originally known as The UK Offshore Operators Association It is the leading representative body for the UK offshore oil and gas industry Note 1 Several of the data exchange formats referenced in this document were originally published by UKOOA Responsibility for the maintenance of these formats passed to OGP in 2006 Note 2 See www oilandgasuk co uk unit ISO TC211 defined quantity in which dimensioned parameters are expressed Note Also referred to as unit of measure In the EPSG Dataset three types of unit are distinguished linear angular and scale vertical coordinate system ISO TC211 one dimensional coordinate system used for gravity related height or depth measurements vertical CRS ISO TC211 one dimensional CRS based on a vertical datum
156. l 1 HC 1 6 1 Coordinate System Axis 1 5 1 113 Depth down D 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 6 6 compound WGS 84 UTM zone 28N SL depth HC 1 4 1 Compound Horizontal CRS 6 1 WGS 84 UTM zone 28N HC 1 4 2 Compound Vertical CRS 6 5 SL depth HC 1 4 0 CRS Number EPSG Code Type Name 7 4979 3 geographic 3D WGS 84 HC 1 4 4 Geodetic Datum 7 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 7 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 7 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 7 6423 Ellipsoidal 3D CS 3 ellipsoidal 3 HC 1 6 1 Coordinate System Axis 1 7 1 108 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 7 2 109 Geodetic longitude east Long 3 degree HC 1 6 1 Coordinate System Axis 3 7 3 110 Ellipsoidal height up h 1 metre HC 1 7 0 Transformation Number EPSG Code Name Source 1 15593 geographic3D to geographic2D 7 6 2010 11 02 EPSG HC 1 8 0 Transformation Number EPSG Code Name 1 15593 geographic3D to geographic2D HC 1 8 1 Source CRS Target CRS Version 1 7 4979 WGS 84 2 4326 WGS 84 HC 1 8 2 Transformation Method 1 9659 Geographic3D to 2D conversion 1 0 HC 1 9 0 Example Point Conversion 1 7 42 00000000 15 00000000 0 000 1 500000 00 4649776 22 2 42 00000000 15 00000000 HC 2 0 0 Survey Configuration 1 0 24 1 metre HC 2 1 0 Orca 1 Navigation Orca 1 8 1 HC 2 3 0 Train 2 1 V1 1 Vessel 13 HC 2 3 0 Source G1 2 G1 4 Air Gun 1 2
157. lly but not necessarily the Earth through a datum The association of a coordinate system and a datum gives rise to a coordinate reference system Conversely a coordinate reference system CRS is comprised of a datum and a coordinate system Note the distinction between the terms coordinate system and coordinate reference system is significant Beware of the colloquial use of coordinate system which may mean coordinate reference system Coordinate Tuple e g X Y Z Coordinate Reference System e g ETRS89 Coordinate Tuple 1 e g X1 Y1 Z1 Coordinate Tuple 2 e g X2 Y2 Z2 Coordinate Tuple n e g Xn Yn Zn Coordinate Set is referenced to is referenced to contains Coordinate Tuple Figure 1 Conceptual relationship of coordinates to a Coordinate Reference System CRS Figure 2 Conceptual Model of a Coordinate Reference System Coordinate Reference System e g ETRS89 Datum Geodetic Coordinate System Cartesian 3D is comprised of 11 OGP P1 11 Geophysical position data exchange format user guide OGP A coordinate tuple referenced to one CRS may be changed to being referenced to a second CRS through a coordinate conversion or transformation ISO 19111 distinguishes between these A coordinate conversion changes coordinates between two CRSs referencing the same datum A coordinate transformation changes coordinates between two CRSs referencing dif
158. m 2 20 Independent Recording Cable Free and Communication Free Continuously HC 2 1 1 Polarity 2 1 SEG 85 OGP P1 11 Geophysical position data exchange format user guide OGP HC 2 1 1 Sample Interval 2 2 2 8 milliseconds HC 2 1 1 Record Length 2 3 12 5 second HC 2 1 1 Channels Per Record 2 4 4 HC 2 1 1 Tape Type 2 5 32GB NAND Flash Memory HC 2 1 1 Tape Format 2 6 SEG D 8058 32 bit IEEE demultiplexed HC 2 1 1 Tape Density 2 7 32GB NAND Flash Memory HC 2 1 1 Filter Alias Hz dB pnt slope 2 100 0 8 Nyquist Minimum Phase HC 2 1 1 Filter_low Hz dB pnt slope 2 14 Out HC 2 1 1 Time Delay FTB to SOD 2 17 0 8 milliseconds HC 2 1 1 Time Delay FTB to SOD Applied to Data Flag 2 18 Not applied HC 2 1 1 Components Recorded Multi 2 19 Z HC 2 1 2 Auxilliary Channel 1 Definition 2 1 Recorded but not used HC 2 1 2 Auxilliary Channel 2 Definition 2 2 Recorded but not used HC 2 1 2 Auxilliary Channel 3 Definition 2 3 Recorded but not used HC 2 1 2 Auxilliary Channel 4 Definition 2 4 Confirmation TB HC 2 2 0 Geospace Technologies Close Tolerance Geophone 3 G4 Land Geophone GS 30CT HC 2 2 1 Polarity 3 1 SEG HC 2 2 1 Damping Coefficient 3 2 0 67 HC 2 2 1 Natural Frequency 3 3 10 10 hertz HC 2 2 1 Number of Elements in Group 3 4 1 HC 2 2 1 Inline Dimension of Group 3 5 0 5 US S
159. mple Reference points of engineering plant grids well tracks etc EPSG OGP acronym of the European Petroleum Survey Group formerly a forum of chief surveyors and geodetic experts from European based E amp P operators This forum has been absorbed into the International Oil and Gas Producers Association as the OGP Surveying amp Positioning Committee The acronym EPSG remains associated as a brand name with the EPSG Geodetic Parameter Dataset a product of the original EPSG EPSG code OGP numeric code allocated to geodetic data objects in the EPSG Dataset Note Also see EPSG geodetic Parameter Dataset EPSG data model OGP the data model that underlies the EPSG Geodetic Parameter Dataset Note the EPSG data model is a profile i e a consistent sub model of ISO 19111 EPSG Dataset see EPSG Geodetic Parameter Dataset EPSG Geodetic Parameter Dataset OGP dataset of geodetic data objects with worldwide coverage published by OGP Note 1 Also known as EPSG Dataset Note 2 The dataset is distributed through a web based delivery platform see EPSG Registry or in a MS Access relational database and SQL script files See http info ogp org uk geodesy EPSG Registry OGP the EPSG Geodetic Parameter Registry a web based delivery platform for the EPSG Geodetic Parameter Dataset Note The EPSG Registry can be accessed in any web browser using URL www epsg registry org ESRI geodatabase feature classes ESRI
160. mstances implicit identification cannot be made1 However the HC 1 3 0 header record is still required by the format and should be populated to the extent possible Coordinate transformation parameters are similarly explicitly described in records HC 1 8 n and implicitly identified in HC 1 7 0 Map projections are a subset of coordinate operations but shall not be described through HC 1 7 0 and HC 1 8 n records Instead they form part of a projected CRS description and are explicitly described through HC 1 5 n records The HC 1 9 0 record allows examples of conversions and transformations to be supplied 2 4 2 CRS Implementation Strategy When populating explicit descriptions some artefacts of the data model need to be understood These are highlighted below Derived Coordinate Reference Systems The ISO 19111 and EPSG data models include a concept of a derived coordinate reference system This is a data modelling convenience used to associate CRSs together A derived CRS is related to a base CRS through a coordinate conversion There are two areas of note i Geodetic CRSs are subdivided in EPSG into three subtypes geocentric geographic 3D and geographic 2D For older geodetic systems only the geographic 2D subtype will exist But for modern systems the three subtypes are related together through the geographic 3D CRS being derived from the geocentric CRS the base CRS and in turn the geographic 2D CRS being d
161. nce file 1 8657 alaska las HC 1 8 3 Longitude difference file 1 8658 alaska los 53 OGP P1 11 Geophysical position data exchange format user guide OGP Number Example Details 7 Projected CRS American Polyconic Brazil SAD69 Brazil Polyconic HC 1 0 0 Reference Systems Summary 4 0 4 2 HC 1 1 0 Unit of Measure 1 metre length 2 metre 9001 EPSG Dataset 7 6 9001 HC 1 1 0 Unit of Measure 2 radian angle 2 radian 9101 EPSG Dataset 7 6 9101 HC 1 1 0 Unit of Measure 3 degree angle 2 2 0 3 141592654 180 0 degree 9102 EPSG Dataset 7 6 9102 HC 1 1 0 Unit of Measure 4 unity scale 2 unity 9201 EPSG Dataset 7 6 9201 HC 1 1 1 Example Unit Conversion 1 2 1 3 57 295779513 HC 1 3 0 CRS Number EPSG Code Name Source 1 29101 SAD69 Brazil Polyconic 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4618 SAD69 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 3 4326 WGS 84 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 4 4979 WGS 84 7 6 2010 11 02 EPSG HC 1 4 0 CRS Number EPSG Code Type Name 1 29101 1 projected SAD69 Brazil Polyconic HC 1 4 3 Base Geographic CRS 1 2 4618 HC 1 4 4 Geodetic Datum 1 6618 South American Datum 1969 HC 1 4 5 Prime Meridian 1 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 1 7050 GRS 1967 Modified 6378160 1 metre 298 25 HC 1 5 0 Projection 1 19941 Brazil Polyconic HC 1 5 1 Projection Method 1 9818 American Polyconic 4
162. nition 1 3 Analog Uphole HC 2 1 2 Auxilliary Channel 4 Definition 1 4 HC 2 2 0 Input Output SM 24 Geophone Element 2 G1 Land Geophone SM 24 HC 2 2 1 Polarity 2 1 SEG HC 2 2 1 Damping Coefficient 2 2 0 67 HC 2 2 1 Natural Frequency 2 3 10 10 hertz HC 2 2 1 Number of Elements in Group 2 4 6 HC 2 2 1 Inline Dimension of Group 2 5 60 5 US Survey Foot HC 2 2 1 Crossline Dimension of Group 2 6 0 5 US Survey Foot HC 2 2 1 Inline Distance Between Elements in the Group 2 7 0 5 US Survey Foot HC 2 2 1 Crossline Distance Between Elements in the Group 2 8 12 5 US Survey Foot HC 2 2 0 Sercel 408ULS Multi_Component Hydrophone Geophone 4 R1 MULTI Component 408ULS CC 1 0 0 Cable Recording Line 111 Sercel 408ULS Multi Component Hydrophone Geophone HC 2 2 1 Polarity 4 1 SEG HC 2 2 1 Damping Coefficient 4 2 0 67 HC 2 2 1 Natural Frequency 4 3 10 10 hertz HC 2 2 1 Number of Elements in Group 4 4 1 HC 2 2 1 Inline Dimension of Group 4 5 1 5 US Survey Foot HC 2 2 1 Crossline Dimension of Group 4 6 1 5 US Survey Foot HC 2 2 1 Inline Distance Between Elements in the Group 4 7 1 5 US Survey Foot HC 2 2 1 Crossline Distance Between Elements in the Group 4 8 1 5 US Survey Foot HC 2 1 0 Fairfield Z700 Remote Marine Nodal Acq n System 2 Acquisition Management Fairfield Z700 HC 2 1 1 Method Of Transfer With Recording Syste
163. ns with the H1 identifier D Data records P1 S1 R1 X1 M1 N1 Following the header section the data records contain the preplot survey perimeter and position data postplot as appropriate for the intended purpose of the file and attribute information relevant to the position E Comment records CC Comments may be used to provide additional relevant information about any record in the file A comment record can be inserted anywhere after the HC 0 1 0 header record A comment record should be located as close as possible to the item to which it refers 5 OGP P1 11 Geophysical position data exchange format user guide OGP Particular attention should be paid to including all mandatory record types It is highly recommended that optional record and field types be added if available The user is referred to Appendix B of the P1 11 Format Description for a more detailed description of the mandatory and optional header items relating to the P1 11 format A summary of requirements for new acquisition is given in the table below Record Type Requirement OGP File Identification Record Mandatory for all format types Survey Definition Mandatory for all format types Reference Systems Definition Mandatory for all format types Survey Configuration Mandatory for P1 11 and P2 11 Production System Information Mandatory for P1 11 and P2 11 Receiver Information Mandatory for P1 11 and P2 11 Object Information Mandato
164. nsverse Mercator US State Plane grid NADCON transformation Alaska NAD83 TM State Plane zone 4 US survey feet transformation NADCON Alaska HC 1 0 0 Reference Systems Summary 6 1 4 1 HC 1 1 0 Unit of Measure 1 metre length 2 metre 9001 EPSG Dataset 7 6 9001 HC 1 1 0 Unit of Measure 2 radian angle 2 radian 9101 EPSG Dataset 7 6 9101 HC 1 1 0 Unit of Measure 3 degree angle 2 2 0 3 141592654 180 0 degree 9102 EPSG Dataset 7 6 9102 HC 1 1 0 Unit of Measure 4 unity scale 2 unity 9201 EPSG Dataset 7 6 9201 HC 1 1 0 Unit of Measure 7 second time 12 second POSC UoM Dictionary 2 2 s HC 1 1 0 Unit of Measure 8 US survey foot length 2 1 0 12 39 37 0 US survey foot 9003 EPSG Dataset 7 6 9003 HC 1 1 1 Example Unit Conversion 2 2 1 3 57 295779513 HC 1 2 0 Time Reference System 1 1 0 UTC 0 7 HC 1 3 0 CRS Number EPSG Code Name Source 1 26934 NAD83 Alaska zone 4 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4269 NAD83 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 3 4267 NAD27 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 4 26734 NAD27 Alaska zone 4 7 6 2010 11 02 EPSG HC 1 4 0 CRS Number EPSG Code Type Name 1 26934 1 projected NAD83 Alaska zone 4 HC 1 4 3 Base Geographic CRS 1 2 4269 HC 1 4 4 Geodetic Datum 1 6269 North American Datum 1983 HC 1 4 5 Prime Meridian 1 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 1 7
165. og2D domain 1 3 HC 1 8 4 X axis translation 1 8605 678 1 metre 1 HC 1 8 4 Y axis translation 1 8606 670 1 metre 1 HC 1 8 4 Z axis translation 1 8607 48 1 metre 1 HC 1 8 0 Transformation Number EPSG Code Name 2 15593 geographic3D to geographic2D HC 1 8 1 Source CRS Target CRS Version 2 4 4979 WGS 84 3 4326 WGS 84 HC 1 8 2 Transformation Method 2 9659 Geographic3D to 2D conversion 1 0 HC 1 9 0 Example Point Conversion 1 1 589781 44 663998 87 2 6 00000000 115 00000000 3 5 99906770 115 00299260 OGP 48 International Association of Oil amp Gas Producers Number Example Details 4 Projected CRS Polar Stereographic variant B WGS 84 Arctic Polar Stereographic HC 1 0 0 Reference Systems Summary 4 1 3 1 HC 1 1 0 Unit of Measure 1 metre length 2 metre 9001 EPSG Dataset 7 6 9001 HC 1 1 0 Unit of Measure 2 radian angle 2 radian 9101 EPSG Dataset 7 6 9101 HC 1 1 0 Unit of Measure 3 degree angle 2 2 0 3 141592654 180 0 degree 9102 EPSG Dataset 7 6 9102 HC 1 1 0 Unit of Measure 7 second time 12 second POSC UoM Dictionary 2 2 s HC 1 1 1 Example Unit Conversion 1 2 1 3 57 295779513 HC 1 2 0 Time Reference System 1 1 0 UTC 0 7 HC 1 3 0 CRS Number EPSG Code Name Source 1 3995 WGS 84 Arctic Polar Stereographic 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4326 WGS 84 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 3 4979 WGS 84 7 6 2010 11 0
166. ojection 1 16031 UTM zone 31N HC 1 5 1 Projection Method 1 9807 Transverse Mercator 5 HC 1 5 2 Latitude of natural origin 1 8801 0 3 degree HC 1 5 2 Longitude of natural origin 1 8802 3 3 degree HC 1 5 2 Scale factor at natural origin 1 8805 0 9996 4 unity HC 1 5 2 False easting 1 8806 500000 1 metre HC 1 5 2 False northing 1 8807 0 1 metre HC 1 6 0 Coordinate System 1 4400 Cartesian 2D CS 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 1 1 1 Easting east E 1 metre HC 1 6 1 Coordinate System Axis 2 1 2 2 Northing north N 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 2 4230 2 geographic 2D ED50 HC 1 4 4 Geodetic Datum 2 6230 European Datum 1950 HC 1 4 5 Prime Meridian 2 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 2 7022 International 1924 6378388 1 metre 297 HC 1 6 0 Coordinate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree 43 OGP P1 11 Geophysical position data exchange format user guide OGP HC 1 4 0 CRS Number EPSG Code Type Name 3 5715 5 vertical MSL depth HC 1 4 7 Vertical Datum 3 5100 Mean Sea Level HC 1 6 0 Coordinate System 3 6498 Vertical CS 5 vertical 1 HC 1 6 1 Coordinate System Axis 1 3 1 113 Depth down D 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 4 6 compound ED50 UTM zone 31N MSL depth HC 1 4 1 Compo
167. on 1 2 1 0 3 57 295779513 This example number 1 as underlined shows that 1 0 unit of UNITREF 2 radian converts to 57 295779513 units of UNITREF 3 degree defined as floating point numbers Field 7 onwards can be repeated as required as in the example above or the record repeated as shown below HC 1 1 1 Example Unit Conversion 1 2 1 0 HC 1 1 1 Example Unit Conversion 1 3 57 295779513 UNITREF DATATYPEREF 9 OGP P1 11 Geophysical position data exchange format user guide OGP The following example number 8 shows that 1 0 unit of UNITREF 1 metre converts to 3 2808333333 units of UNITREF 5 US survey foot HC 1 1 1 Example Unit Conversion 8 1 1 0 5 3 2808333333 2 3 Time Reference Systems HC 1 2 0 to HC 1 2 1 Each Time Reference System TRS has a unique TRSREF code Section 5 of the P1 11 Format Description The TRSREF code combines a time system such as UTC GPS etc using the TIMEREF code and a UNITREF code which defines the time unit of measure eg seconds and the way the time system is written the DATATYPEREF code For example UTC time may be recorded in a date and time format YYYY MM DD HH MM SS SS or as Julian day and time YYYY JDD HH MM SS SS In most P1 11 files there will only need to be one time reference system defined This capability of handling multiple time reference systems is primaril
168. ond and subsequent points in the perimeter The meaning of coordinate values in data records is defined through CRS coordinate axis records in the Common Header HC 1 6 1 For coordinate n the order and units shall be as given in the axis record order n Multiple areas can also be defined as part of the same perimeter for example if the survey area is divided into discrete blocks using the point group number in field 4 Note that the P6 11 format contains the same capability for storing survey perimeter details as the P1 11 format as M6 position records 34 International Association of Oil amp Gas Producers OGP 8 Data Record Extension A standard Record Extension Field for data records is described in Section 2 7 of the P1 11 Format Description The ability to add additional information relating to a data record is one of the key enhancements in the P1 11 format While the original design and support for seismic acquisition is still fundamental adding additional elements as data moves through processing and ultimately to archive is now supported without a format re versioning or modification Maximum flexibility is built into the format by the use of data record extensions in which any requirement for data storage not explicitly written into the format can be handled without the need for future redefinition This future proofs the format to the maximum extent possible The number of extension attributes that are added to P1 S1 R1 X1
169. onsists of X Y and Z coordinates Note 3 Definition from OGP Guidance Note 7 Part 1 Using the EPSG Geodetic Parameter Dataset with URL http www epsg org guides docs G7 1 pdf geodetic CRS ISO TC211 coordinate reference system based on a geodetic datum Note See geocentric CRS geographic 2D CRS geographic 3D CRS 99 OGP P1 11 Geophysical position data exchange format user guide OGP term definition geodetic datum ISO TC211 datum describing the relationship of a two or three dimensional coordinate system to the Earth geodetic latitude ISO TC211 angle from the equatorial plane to the perpendicular to the ellipsoid through a given point northwards treated as positive Note Usually just referred to as latitude geodetic latitude is normally designated by geodetic longitude ISO TC211 angle from the prime meridian plane to the meridian plane of a given point eastward treated as positive Note Usually just referred to as longitude geodetic longitude is normally designated by geographic 2D CRS OGP a geodetic CRS using a 2D ellipsoidal coordinate system where ellipsoidal height is undefined Note 1 Used when positions of features are described on the surface of the ellipsoid through latitude and longitude coordinates Note 2 Definition from OGP Guidance Note 7 Part 1 Using the EPSG Geodetic Parameter Dataset with URL http www epsg org guides docs G7 1 pdf geograph
170. opographical surface or instantaneous sea level in a tidal environment Attributes at the object location such as water depth or charge depth must be given as measurements in extension fields not as object coordinates For example in a bathymetric survey the echo sounder may be the positioning object but the depth measured at the echo sounder position after reduction to a vertical CRS is stored as a measurement Water Depth not as the vertical coordinate of the echo sounder The record extension field definition would be written as for example 1 3 Water Depth 1 where the second sub field 3 in this case is the CRSREF code for the reference vertical CRS The 1 in the fourth sub field is the UNITREF for the units of measure which must be the same as the axis units defined for CRSREF 1 The following vertical measurement attributes are pre defined in Table 17 Extension attribute description Comment Water Depth record extension identifier 1 This is not the raw measurement see P2 11 format but the measurement after correction and reduction to a vertical reference surface The reference surface CRSREF is required in the second sub field of the extension definition and this must have been defined in the HC 1 3 0 through HC 1 6 n header records Point Depth record extension identifier 3 This is a measured depth below a vertical reference surface The reference surface CRSREF is required in the second sub field of the ex
171. oses HC 1 8 0 Transformation Number EPSG Code Name 1 1613 ED50 to WGS 84 24 1 HC 1 8 0 Transformation Number EPSG Code Name 2 15593 geog3D to geog2D 0 HC 1 8 0 Transformation Number EPSG Code Name 3 1241 NAD27 to NAD83 1 5 HC 1 8 1 Coordinate Transformation CRS Details Definition of the source and target CRS for each coordinate transformation is provided in the P1 11 Common Header HC 1 8 1 as follows source in blue target in red HC 1 8 1 Source CRS Target CRS Version 1 2 4326 WGS 84 17 4230 ED50 EPSG Nor S62 2001 HC 1 8 1 Source CRS Target CRS Version 2 3 4979 WGS 84 2 4326 WGS 84 HC 1 8 1 Source CRS Target CRS Version 3 12 4267 NAD27 9 4269 NAD83 1 This header record assigns the source and target CRSs as defined by the actual direction of implementation of the coordinate transformation The first example above COTRANSREF 1 is available in the EPSG Dataset as coordinate operation code 1613 ED50 to WGS 84 24 but in this instance is used to convert coordinates from WGS 84 the source CRS to ED50 the target CRS HC 1 8 2 Coordinate Transformation Method Details The transformation method is defined in the Common Header HC 1 8 2 as follows HC 1 8 2 Transformation Method 1 9606 Position Vector geog2D domain 1 7 HC 1 8 2 Transformation Method 2 9659
172. ostplot H26 Marine Receivers Line 111 Sta 1661 1913 Ensoco Postplot H26 H26 NOTE TO PROCESSORS H26 H26 An extra FDU was mistakenly inserted between receivers 111 1703 amp 111 1705 H26 for FFID 0001 0727 H26 This FDU has been edited out of the Relational file OGP 78 International Association of Oil amp Gas Producers H26 Note the 2 channel gap between these 2 stations H26 H26 NOTE TO PROCESSORS H26 H26 The extra FDU between receivers 111 1703 amp 111 1705 was disabled for FFID H26 0728 0764 H26 No editing of the Relational file was required H26 H26 NOTE TO PROCESSORS H26 H26 The marine portion of receiver line 111 111 1631 and higher was relaid H26 between FFID 0765 0769 The initial receiver layout is index 1 After the H26 cable relay the receiver index is 2 For simplicity the land receiver H26 positions have been repeated with receiver index 2 even though their H26 position did not move H26 H26 NOTE TO PROCESSORS H26 H26 Marine Point depth column H26 H26 Source height of water above the energy source H26 at the time of the shot H26 H26 Marine Water depth column H26 H26 Source height of water surface above seafloor H26 at the time of the shot H26 Receiver height of water surface above seafloor H26 at the time of the receiver lay H26 Nikisi Alaska H26 H26 NOTE TO PROCESSORS H26 H26 This is a final version H26 H26 USE OF THIS FILE BY THE OGP P1 P2 TASK FORCE H26 HAS BEEN APPROVED BY APACHE CORP H2
173. pedia org wiki Comma separated_values data exchange format defined format for the exchange of digital data Note See OGP SEG UKOOA data operation GIGS any action performed on spatial data Note This may refer to data import data export data transfers within the software or between software packages or any other data manipulation including specifically coordinate operations dataset ISO TC211 identifiable collection of data Note In GIGS a dataset is interpreted as a collection of data produced by a software package it may be used for output export or as input to another part of the same software datum ISO TC211 parameter or set of parameters that define the position of the origin the scale and the orientation of a coordinate system Note See also geodetic datum vertical datum and engineering datum deprecation GIGS process of rendering a data item invalid or obsolete by removing or flagging the item In the EPSG Dataset deprecation is achieved by setting a flag associated with the data item depth see gravity related height or depth early binding GIGS a priori association of a coordinate transformation with a geodetic CRS Note The association is usually made at start up of the session or project as that is defined in the software but always before any data is associated with the CRS In general the coordinate transformation specified uses the CRS of the data as the source CRS and WGS 84 as
174. per million 1 The relationship of the current default CRS of the data records to the original CRS is thereby preserved It is important to note that although record HC 1 8 1 gives the direction of the transformation as from WGS 84 to ED50 survey operation source and target CRSs respectively the transformation parameters in HC 1 8 4 are always quoted for the direction defined by the EPSG transformation in this case from ED50 to WGS 84 24 International Association of Oil amp Gas Producers OGP 3 Common Header Survey Configuration This section of the Common Header contains details of the production and receiving components of a geophysical data acquisition system Both marine and land acquisition systems can be described in the format The first record in this section HC 2 0 0 is a summary which provides the number of production amp receiving systems present and the number of objects being positioned 3 1 Production System Information A production system in the context of this format is any computer system used in the acquisition of geophysical data and can be either an integrated navigation system or a seismic recording system The first record in this section HC 2 1 0 is used to identify the production systems and some key properties such as software version HC 2 1 0 Integrated Navigation and Positioning System 1 Navigation STARNAV 4 1 Update 21 2012 06 01 HC 2 1 0 Seismic Recording System
175. potentially stifle innovation the differential between events will nonetheless remain useful It is intended that these error ellipses be as close to absolute values as is feasible and that key factors that dominate the dimensioning of the ellipses such as the a priori SDs of the contributing observations are properly assessed and applied There is scope in the P2 11 format to record these and the number of absolute positioning systems used at the hub of the network Interpolated positions particularly useful for OBC receivers extrapolated positions and general node redundancy levels can also be flagged recorded in the 32 International Association of Oil amp Gas Producers OGP P1 11 quality measure record extension field Propagation of quality measures from the nearest network node is taken as read as is the fact that few if any other than error ellipse dimensions will reflect their remoteness from nodes Since the methodology used may be both retrospective i e a reprocessing technique and piecemeal involving only part of a file it is anticipated that error ellipses may not be in total sympathy in terms of technique throughout that file Comment records CC should be used in the header to clearly state shot point ranges and the relevant processing contractor software details and be amended as appropriate as and when any changes are made In the case of any block shift or any methodology potentially throwing uncertainty on archiv
176. ptional Optional Perimeter Definition Records H1 5 0 0 M1 Recommended Recommended Recommended P1 Data Records S1 P1 R1 Mandatory Mandatory Mandatory Quality Measures Defined in File Header Recorded in P1 position records Mandatory Mandatory Mandatory 41 OGP P1 11 Geophysical position data exchange format user guide OGP 2 Minimum file content requirements by records group for legacy data Records Group Records Conversion of Legacy Marine Data Conversion of Legacy Land Data Conversion of Legacy TZ OBC Data OGP Record OGP Mandatory Mandatory Mandatory Survey Definition HC 0 x x Mandatory Mandatory Mandatory Reference Systems Summary Information HC 1 0 0 Mandatory Mandatory Mandatory Unit Reference Systems HC 1 1 x Mandatory Mandatory Mandatory Time Reference Systems HC 1 2 x Mandatory Mandatory Mandatory Coordinate Reference Systems HC 1 3 9 x Mandatory Mandatory Mandatory Survey Configuration HC 2 0 0 Mandatory Mandatory Mandatory Production System Information HC 2 1 x Conditional Mandatory Conditional Mandatory Conditional Mandatory Receiver Information HC 2 2 x Mandatory for HC 2 2 0 Mandatory for HC 2 2 0 Mandatory for HC 2 2 0 Object Information HC 2 3 x Mandatory Mandatory Mandatory Comments CC x x x Optional Optional Optional P1 Header Content Definition H1 0 x x Mandatory Mandatory Mandatory P1 Header Position Definition
177. put raw measurements have been prepared in some way sufficient precision should be retained in these preparation and computation stages such that the resulting position records retain a precision which is commensurate with the quality of the raw observables The general rule of not to round until the last stage in the computation process should be observed For data recorded in the field from new projects the resolution should be agreed by the end user and the acquisition entity before the start of the project The end user checklist in Appendix F in this document can be used for this purpose For data converted from legacy formats the resolution should be selected such that it is no less than the resolution of the original data For common position units of measure the recommended resolutions decimal places of the unit commensurate with various data accuracies are given in the table below Accuracy Unit of Measure Distance 1m 0 1m 0 01m 1cm 0 001m 1mm decimal degrees Lat Long 6 7 8 9 sexagesimal degrees degrees minutes and seconds resolution applies to seconds 2 3 4 5 metres all versions 0 1 2 3 feet all versions 0 1 2 3 yards all versions 0 1 2 3 fathoms 1 2 3 4 kilometres 3 4 5 6 miles all versions 4 5 6 7 Unit of Measure Angles 1 Degree 0 1 Degrees 0 01 Degrees 0 001 Degrees degrees 0 1 2 3 radians 7 8 9 10 grads 6 7 8 9 Table 2 Re
178. rce 1 1174 NAD27 to WGS 84 5 7 9 2011 08 17 EPSG HC 1 8 0 Transformation Number EPSG Code Name 1 1174 NAD27 to WGS 84 5 11 OGP 72 International Association of Oil amp Gas Producers HC 1 8 1 Source CRS Target CRS Version 1 2 4267 NAD27 5 4326 WGS84 DMA ConusE HC 1 8 2 Transformation Method 1 9603 Geocentric translations geog2D domain 1 3 HC 1 8 4 X axis translation 1 8605 9 0 1 metre 1 HC 1 8 4 Y axis translation 1 8606 161 0 1 metre 1 HC 1 8 4 Z axis translation 1 8607 179 0 1 metre 1 HC 1 9 0 Example Point Conversion 1 2 40 28349935 79 40469878 1 1538368 17 350451 44 5 40 28354895 79 40445770 HC 2 0 0 Survey Configuration 1 0 1 5 US Survey Foot HC 2 1 0 Land Seismic Survey 1 Position Data Unknown HC 2 3 0 Land Shot Point 1 SP 7 Explosive CC 1 0 0 LINE 5NE 258 169 SHOTS 1 TO 169 6 726 miles CC 1 0 0 No date and times were available on SEGP1 input file H1 0 0 0 File Contents Description Shot Point Imported from SEGP1 file H1 0 1 0 Processing Details Converted from SEGP1 file H1 1 0 0 Position Record Type Definition 1 4 2 5 1 0 H1 1 0 1 Position Record Quality Definition 1 0 No Quality Data Recorded 0 S1 0 5NE 258 1 1 1 SP 1 1538369 0 350451 0 1043 40 28349935 79 40469878 40 28354895 79 40445770 S1 0 5NE 258 2 1 1 SP 1 1538434 0 350688 0 1073 40 28415317 79 40448176 40 28420006 79 40423699 S1 0 5NE 258 3 1 1 SP 1 1538503 0 350924 0 1075
179. rd M1 Certain perimeter types are prescribed by the format such as full fold coverage others such as a polygon representing the oil water contact can be user defined code 7 onwards As for the preplot definition 2 CRSs should be defined in the survey perimeter header record Note that the P6 11 format contains the same capability for storing survey perimeter details as the P1 11 format as M6 position records 28 International Association of Oil amp Gas Producers OGP 7 P1 Data Records 7 1 A Note on Data Resolution Any data generated by processing input data be it processed data or processed positions should be written to a resolution commensurate with its accuracy The P1 11 format does not prescribe the precision with which position records can be written The decision therefore rests with the users of the format The precision to which coordinates are recorded depends on a number of factors and a number of rules Valid precision should not be lost by recording to insufficient decimal places Similarly valid precision should not be allowed to be compromised by cross conversion between the geographical and projected CRS Eight decimal places are recommended for the lat long positions in decimal degrees and two decimal places for the grid position in metres which should retain such position creep to the centimetre level Given that the P1 position records are often the output of a network adjustment for which the in
180. rds may need to be exported in another CRS which should also be numbered to preserve the sequential order in the file This block should be sorted by CRS number field 6 of the HC 1 3 0 record For example the following header records would appear together in a block HC 1 3 0 CRS Number EPSG Code Name Source 1 4326 WGS 84 7 6 2010 11 02 EPSG Loaded from EPSG_v7_6 mdb HC 1 3 0 CRS Number EPSG Code Name Source 2 4230 ED50 7 6 2010 11 02 EPSG Loaded from EPSG_v7_6 mdb HC 1 3 0 CRS Number EPSG Code Name Source 3 23031 ED50 UTM zone 31N 7 6 2010 11 02 EPSG Loaded from EPSG_v7_6 mdb HC 1 3 0 CRS Number EPSG Code Name Source 4 5100 Mean Sea Level 7 6 2010 11 02 EPSG Loaded from EPSG_v7_6 mdb Once the CRS sequence has been given as above explicit definitions of all CRSs shall be given in HC 1 4 n through HC 1 6 n records For each CRS all component records shall be kept as a block ordered as in the format document i e sorted alphabetically by header record code in fields 1 through 4 Then each CRS block shall be given sorted by CRS number field 6 of the HC 1 3 0 record For example HC 1 4 0 CRS Number EPSG Code Type Name 1 4326 2 geographic 2D WGS 84 HC 1 4 4 Geodetic Datum 1 6326 World Geodetic System 1984 HC 1 4 6 Ellipsoid 1 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System
181. re 14 29 2000 19 pounds square inch HC 2 3 1 Number of Sub Arrays 14 30 2 HC 2 3 1 Nominal Towing Depth 14 31 3 0 1 metre HC 2 3 0 Input Output Air Gun Array 302 15 A2 4 Air Gun Sleeve Gun Model II HC 2 3 1 Polarity 15 1 SEG HC 2 3 1 Air Volume 15 4 1200 15 cubic inch HC 2 3 1 Vertical Fold of Stack 15 5 1 HC 2 3 1 Number of Elements in Pattern 15 7 8 HC 2 3 1 Inline Dimension of the Pattern 15 8 0 1 metre HC 2 3 1 Crossline Dimension of the Pattern 15 9 0 1 metre HC 2 3 1 Inline Distance Between Elements in the Pattern 15 7 0 1 metre HC 2 3 1 Crossline Distance Between Elements in the Pattern 15 8 0 1 metre HC 2 3 1 Nominal Air Pressure 15 29 2000 19 pounds square inch HC 2 3 1 Number of Sub Arrays 15 30 1 HC 2 3 1 Nominal Towing Depth 15 31 3 0 5 US Survey Foot HC 2 3 0 Input Output Air Gun Array 303 16 A3 4 Air Gun Sleeve Gun Model II HC 2 3 1 Polarity 16 1 SEG HC 2 3 1 Air Volume 16 4 1760 15 cubic inch HC 2 3 1 Vertical Fold of Stack 16 5 1 HC 2 3 1 Number of Elements in Pattern 16 7 16 HC 2 3 1 Inline Dimension of the Pattern 16 8 4 5 1 metre HC 2 3 1 Crossline Dimension of the Pattern 16 9 0 0 1 metre HC 2 3 1 Inline Distance Between Elements in the Pattern 16 7 0 1 metre HC 2 3 1 Crossline Distance Between Elements in the Pattern 16 8 0 1 metre HC 2 3 1 Nominal Air Pressure 16 29 2
182. red to define the measurement orientation because it is not referenced to a vertical datum In the data records Section 10 of the P1 11 Format Description the source type and CRS TRS combination are linked through inclusion of OBJREF field 9 and P1TYPEREF field 11 identifiers respectively as shown by the arrows in the example below For ease of reading the records have been wrapped and inset onto the next line Land surface elevation in red text charge depth in blue text S1 0 T21021P1002 1001 1 2002 088 05 05 50 0 1 Vib 1 655603 40 9737243 40 6 6 2 37651470 133 39942456 1 5 0 5 S1 0 T21021P1002 1002 1 2002 088 05 06 07 0 1 Vib 1 655626 30 9737233 30 4 4 2 37660584 133 39963056 1 5 0 5 S1 0 T21021P1002 1003 1 2002 088 05 06 24 0 1 Vib 1 655644 30 9737214 40 2 2 2 37677661 133 39979258 1 5 0 5 S1 0 T21021P1002 1007 1 2002 088 05 07 26 0 2 SP 2 655720 90 9737150 00 1 8 2 37735837 133 40048194 1 0 0 5 10 0 S1 0 T21021P1002 1008 1 2002 088 05 07 41 0 2 SP 2 655742 00 9737136 90 3 9 2 37747666 133 40067178 1 0 0 5 10 0 S1 0 T21021P1002 1009 1 2002 088 05 07 57 0 2 SP 2 655762 80 9737122 10 6 0 2 37761033 133 40085894 1 0 0 5 10 0 Notes i In a transition zone survey land surface elevations can be recorded as positive up and water depths as positive down as defined by the parameters of the vertical axis of their respective CRS in the Common Header ii In the a
183. ree HC 1 5 2 Longitude of natural origin 1 8802 111 3 degree HC 1 5 2 Scale factor at natural origin 1 8805 0 9999 4 unity HC 1 5 2 False easting 1 8806 0 1 metre HC 1 5 2 False northing 1 8807 0 1 metre HC 1 6 0 Coordinate System 1 4400 Cartesian 2D CS 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 1 1 1 Easting east E 1 metre HC 1 6 1 Coordinate System Axis 2 1 2 2 Northing north N 1 metre HC 1 4 0 CRS Number EPSG Code Type Name 2 4267 2 geographic 2D NAD27 HC 1 4 4 Geodetic Datum 2 6267 North American Datum 1927 HC 1 4 5 Prime Meridian 2 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 2 7008 Clarke 1866 6378206 4 1 metre 0 HC 1 6 0 Coordinate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 3 4269 2 geographic 2D NAD83 HC 1 4 4 Geodetic Datum 3 6269 North American Datum 1983 HC 1 4 5 Prime Meridian 3 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 3 7019 GRS 1980 6378137 1 metre 298 257222101 HC 1 6 0 Coordinate System 3 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 3 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 3 2 107 Geodetic longitude east Long 3 degree HC 1 7 0 Transformation Number EPSG Code Name Source 1 1313 NAD27 to NAD83 4 7 6 2010 11 02 EPSG
184. ree 9102 EPSG Dataset 7 6 9102 HC 1 1 0 Unit of Measure 4 unity scale 2 unity 9201 EPSG Dataset 7 6 9201 HC 1 1 0 Unit of Measure 5 second time 12 second POSC UOM Dictionary 2 2 s HC 1 1 1 Example Unit Conversion 1 3 1 2 0 017453293 HC 1 2 0 Time Reference System 1 1 0 UTC 0 5 HC 1 3 0 CRS Number EPSG Code Name Source 1 23028 ED50 UTM zone 28N 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 2 4230 ED50 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 3 5715 MSL depth 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 4 ED50 UTM zone 28N MSL depth HC 1 3 0 CRS Number EPSG Code Name Source 5 SL Depth 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 6 ED50 UTM zone 28N SL Depth HC 1 3 0 CRS Number EPSG Code Name Source 7 4326 WGS 84 7 6 2010 11 02 EPSG HC 1 3 0 CRS Number EPSG Code Name Source 8 4979 WGS 84 7 6 2010 11 02 EPSG HC 1 4 0 CRS Number EPSG Code Type Name 1 23028 1 projected ED50 UTM zone 28N HC 1 4 3 Base Geographic CRS 1 2 4230 HC 1 4 4 Geodetic Datum 1 6230 European Datum 1950 HC 1 4 5 Prime Meridian 1 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 1 7022 International 1924 6378388 1 metre 297 HC 1 5 0 Projection 1 16028 UTM zone 28N HC 1 5 1 Projection Method 1 9807 Transverse Mercator 1 5 HC 1 5 2 Latitude of natural origin 1 8801 0 3 degree HC 1 5 2 Longitude of natural origin 1 8802 15 3 d
185. rnational Association of Oil amp Gas Producers H1000CLOCK TIME UTC H1100RECEIVER GROUPS PER SHOT 4800 H1400GEODETIC DATUM SURVEY WGS 84 WGS 84 6378137 000 298 2572236 H1401SURVEY TO WGS 84 0 0 0 0 0 0 0 000 0 000 0 000 0 0000000 H1500GEODETIC DATUM POST PLOT WGS 84 WGS 84 6378137 000 298 2572236 H1501POST PLOT TO WGS 84 0 0 0 0 0 0 0 000 0 000 0 000 0 0000000 H1510TOWNSHIP SYSTEM DATA FLAG N A H1600SURVEY TO POST PLOT 0 0 0 0 0 0 0 000 0 000 0 000 0 0000000 H1700VERTICAL DATUM SL ECHOSOUNDER H1800PROJECTION TYPE 1 UNIVERSAL TRANSVERSE MERCATOR NORTH H1810TOWNSHIP RELATIVE COORDS N A H1900PROJECTION ZONE 28 NORTHERN HEMISPHERE H1910TOWNSHIP PRINCIPAL MERIDIANN A H2000GRID UNIT 1METRES 1 000000000000 H2001HEIGHT UNIT 1METRES 1 000000000000 H2002ANGULAR UNIT 1DEGREES H2200LONG OF CENTR MERID 0150000 000W H2301GRID ORIGIN 0000000 000N0150000 000W H2302GRID COORD AT ORIGIN 500000 00E 0 00N H2401SCALE FACTOR 0 9996000000 H2402LAT LON WHERE SCALE DEF 0000000 000N0150000 000W H2600LINE CSL T21021P1002 321 SHOTS 1001 TO 1321 H2600GENERATED BY ORCA 1 8 1 FROM QC NRT DATABASE H2600 VESSEL 1 ECHOSOUNDER 1 Echosounder 12 KHz H2600 VELOCITY USED IN VESSEL 1 ECHOSOUNDER 1 1500 000000 M S H2600 CALIBRATED CORRECTION USED IN VESSEL 1 ECHOSOUNDER 1 0 000000 M S H2600 CALIBRATED VELOCITY CORRECTION HAS NOT BEEN APPLIED TO WATER DEPTHS H2600 ORCA DOES NOT CORRECT RAW ECHO DATA FOR VESSEL PITCH ROLL AND HEAVE H2600 VESSEL 1 ECHOSOUNDER 1 RAW DATA I
186. rsion is P5 94 See www EPSG org p formats html Note 2 Pipeline data is only considered here as an input for mapping purposes P6 98 OGP Industry standard format for the definition of 3D Seismic Binning Grids and the associated data exchange previously established by UKOOA and currently maintained by OGP Current version is P6 98 revised in 2000 and currently under review see Note 2 below Note 1 See www EPSG org p formats html Note 2 An OGP Task Force is currently undertaking a review of P6 with a new version expected to be published Q4 2011 or Q1 2012 P7 2000 OGP Industry standard well deviation data exchange format previously established by UKOOA and currently maintained by OGP Note 1 Current version is Rev 5 2000 See www EPSG org p formats html Note 2 Contains description of well curve data through wellbore survey measurement data measured depth inclination and azimuth or calculated positions P EPSG OGP EPSG Coordinate Reference System Description in UKOOA P Formats maintained by OGP Note 1 See www EPSG org p formats html Note 2 Contains detailed information on compiling CRS information in the other P Formats parameter value OGP value allocated to one specific instance of geodetic parameter Example A parameter value of 6 378 137 is allocated to the geodetic parameter with the name semi major axis of a geodetic data object with the name ellipsoid The same object ha
187. rt of the projected CRS definition In this special case the model of a CRS as shown in figure 2 is modified as shown in figure 4 1 Should this be the case users should consider making a request for the CRS to be included in future releases of the EPSG Dataset at http www epsg org Comms Comment asp 13 OGP P1 11 Geophysical position data exchange format user guide OGP When describing a projected CRS the attributes inherited from the base CRS the geodetic datum and its components shall be documented as part of the projected CRS description HC 1 4 4 through HC 1 4 6 So too should the map projection for projections can use different methods and these methods have different parameters the values of which define the map projection The projection is documented as part of the CRS definition in HC 1 5 n not through HC 1 7 0 and HC 1 8 n coordinate transformation records However it is also a requirement to document the base CRS of each projected CRS This geographic 2D CRS is identified as part of the projected CRS definition in header record HC 1 4 3 but must then be separately fully defined as a different CRS This allows a file CRS number CRSREF to be assigned so that example conversions between geographic and map grid coordinates can be included in the file in HC 1 9 0 If several projected CRSs share the same base geographic 2D CRS the geographic 2D CRS description should be made only once When populating th
188. ry for P1 11 and P2 11 P1 Header Mandatory for P1 11 P1 Data Records Mandatory for P1 11 Table 1 Header Record Requirement 1 3 Data Types Each comma separated field in a P file will be written in one of the data types listed in Table 2 of the P1 11 Format Description The data type to be used for each record in a P1 11 file can be found in the table associated with each record definition in the P1 11 Format Description For example for header record HC 1 0 0 the data type is given in the third column of the table linked to the HC 1 0 0 record definition Notes on specific data types follow Data Type Note Description A text field left justified to 50 characters used in field 5 of most header records Time HH MM SS Used where a fixed format is adequate for example the OGP file identification record Variant This may take the form of any of the data types For example time may be represented by several variants and to varying precisions such as Date and Time YYYY MM DD HH MM SS S and Julian Day and Time YYYY JDD HH MM SS S Note that time can be written to the precision to which it is recorded for example microseconds SS SSSSSS may be the required precision for some forms of acquisition The codes DATATYPEREF assigned to various types of variant data stored within data fields are listed in Table 4 of the P1 11 Format Description The comma separated variable format allows any resolution to be written
189. s H1 1 2 x x Mandatory Mandatory Mandatory Relation Definition Records H1 3 0 0 X1 Conditional Mandatory Conditional Mandatory Conditional Mandatory Preplot Definition Records H1 4 0 0 N1 Not applicable Not applicable Not applicable Perimeter Definition Records H1 5 0 0 M1 Recommended Recommended Recommended P1 Data Records S1 P1 R1 Mandatory Mandatory Mandatory Quality Measures Defined in File Header Recorded in P1 position records Conditional Mandatory1 Conditional Mandatory1 Conditional Mandatory1 The Records Group column generally defines all relevant records in that group Conditional Mandatory Mandatory if available in original data 1In some cases the quality measures may be subjective based on the data conversion process OGP 42 International Association of Oil amp Gas Producers Appendix B Coordinate Reference System and Coordinate Transformation Examples Number Example Details 1 Projected CRS Transverse Mercator Metres Position Vector transformation ED50 UTM zone 31N urn ogc def crs EPSG 23031 reduced depths referred to MSL urn ogc def crs EPSG 5715 coordinate transformation Common Offshore urn ogc def coordinateOperation EPS 1311 HC 1 0 0 Reference Systems Summary 6 0 6 2 HC 1 1 0 Unit of Measure 1 metre length 2 metre 9001 EPSG Dataset 7 6 9001 HC 1 1 0 Unit of Measure 2 radian angle 2 radian 910
190. s the contents of which are prescribed by the format A record commences with an identifier in the first field inferring the type of information the record contains for example HC identifies a header record in the Common Header section of the file R1 identifies a data record for a receiver in the data section of a P1 11 file A P1 11 file consists of two main sections the header containing the metadata and geodetic identity for the survey and the data records In the header section the record identifier HC or H1 is followed by 3 integer fields comprising a numbered multilevel list which in general defines the hierarchical order in which this record should be placed in its respective section In the data records the identifier R1 S1 etc denotes the type of position record to which the positional information that follows refers The file naming convention is filename p111 with p111 or P111 being the only valid file extension Header records will precede data records Files without mandatory header and data records are considered invalid Multiple seismic lines and positional data types per file are allowed as long as all data and header records are consistent with each other Typical examples of different data types and usages are provided in this document see Appendices These are intended as guidelines for minimum content Also included are examples of UKOOA P1 90 SEG P1 and SPS files transcribed to P1 11 form
191. s prefixed by H1 These are described in section 6 below 2 1 Header Records Common to all P formats The following header records are common to P1 and P2 formats A subset is common to P6 Survey Definition HC 0 1 0 to HC 0 7 0 Reference Systems Definition HC 1 0 0 to HC 1 9 0 Survey Configuration HC 2 0 0 Production System Information HC 2 1 0 to HC 2 1 2 Receiver Information HC 2 2 0 to HC 2 2 1 Object Information HC 2 3 0 to HC 2 3 1 The Common Header starts with a subset of records that identify the survey HC 0 1 0 to HC 0 7 0 basic metadata about the survey that is explained in the P1 11 Format Description Section 4 Header record HC 1 0 0 is the record which defines the number of units and reference systems used in the file specifically the number of Units of measure Time reference systems Coordinate reference systems Coordinate transformations 2 2 Units of Measure HC 1 1 0 to HC 1 1 1 Any unit of measure used within the P1 11 file is defined in this section The unit of measure definition in record HC 1 1 0 contains the following items a unique reference number UNITREF a type of measurement unit metre degree second etc a format code DATATYPEREF which describes the way the unit is written degrees can be written as decimal sexagesimal etc for example the identifier UNITREF for the base unit for that type of uni
192. s representative of the transformation throughout its area of derivation If applied well outside of this area this error estimate may be unrealistic In contrast the parameters for a coordinate conversion including map projection are chosen As such they are by definition error free The application of a conversion does not add any inaccuracy to output coordinates conditional on there being sufficient expansion terms in the conversion algorithm and staying within the limits of the projection zone As such no provision for conversion accuracy is necessary Concatenated Coordinate Operations The ISO 19111 and EPSG data models allow for the concept of concatenated coordinate operations These document a series of coordinate operations that are chained together Coordinates referenced to CRS A will be first changed to be referenced to CRS B and then immediately changed to be referenced to CRS C and the concatenated operation documents a change from CRS A to CRS C There is no provision for this construct in the P format records Should it be required to document such an operation each of the individual steps and any intermediate CRSs such as CRS B in this case should be individually documented EPSG Dataset Storage of Coordinate Transformations Strategies applied during data population of the EPSG Dataset are described in OGP Geomatics Guidance Note 7 part 1 see Bibliography The following aspect of these strategies impacts the P form
193. s the parameter value WGS 84 for its name attribute Note Where the term EPSG parameter value is used in this documentation parameter values as recorded in the EPSG Dataset are meant polar coordinate system ISO TC211 two dimensional coordinate system in which position is specified by distance and direction from the origin term definition precision ISO TC211 measure of the repeatability of a set of measurements prime meridian ISO TC211 meridian from which the longitudes of other meridians are quantified Note This is usually the Greenwich prime meridian but usage of other prime meridians Ferro Bogota Paris Jakarta etc projected CRS ISO TC211 CRS derived from a two dimensional geodetic CRS by applying a map projection Note a projected CRS is sometimes referred to as a map grid coordinates in a projected CRS are sometimes referred to as grid coordinates quality ISO TC211 totality of characteristics of a product that bear on its ability to satisfy stated and implied needs Note Quality is often expressed as fitness for purpose SEG Society of Exploration Geophysicists A not for profit organisation that promotes the science of applied geophysics and the education of geophysicists Note See www seg org link to Technical Standards SEG P1 Postplot location data exchange format 1983 Note The SEG P1 format generally superseded by OGP P1 90 but is still important with legacy dat
194. second 1 HC 1 8 4 Y axis rotation 1 8609 0 077 5 arc second 1 HC 1 8 4 Z axis rotation 1 8610 0 894 5 arc second 1 HC 1 8 4 Scale difference 1 8611 1 994 6 parts per million 1 If an EPSG code is given for the transformation in HC 1 7 0 the signs of the parameters shall be the same as quoted for this transformation in the EPSG Dataset If an EPSG compliant database is not referenced by the transformation the signs of the parameters shall be correct for that operation method in the direction inferred by the name of the transformation cited in HC 1 7 0 22 International Association of Oil amp Gas Producers OGP HC 1 9 0 Example Point Conversions The HC 1 9 0 record is used to give test point coordinates for coordinate conversions and transformations It should be used for Each projected CRS Map grid easting and northing coordinates and equivalent ellipsoidal coordinates latitude and longitude for the projected CRS s base geographic 2D CRS Each coordinate transformation Coordinates for the source and target CRSs For each coordinate conversion and transformation it is recommended that at least 2 test points should be listed Ideally it is desirable to use three test points widely separated away from the CRS origin with one pair of points in a north south alignment and another pair of points in an east we
195. st alignment Fields 8 onwards can be repeated as required or the record repeated For each point the coordinates should be listed in at least two CRSs 2 7 Record Grouping in the CRS Section For clarity it is recommended to group the CRS data including coordinate transformations in the Common Header as follows i all CRS implicit identification records followed by ii all CRS explicit definition records followed by iii all coordinate transformation implicit identification records followed by iv all coordinate transformation explicit definition records HC 1 3 0 is the implicit identification statement of all the CRSs associated with the survey and should be repeated for as many CRSs as are involved from preplot through acquisition to re processing The integer number field 6 assigned to each CRS is a matter for the end user to decide It may be decided that the contractual deliverable CRS is assigned CRSREF 1 There may also be merit in reflecting as far as possible the chronological sequence of the data process flow for example survey acquired on WGS84 1 converted on line to ED50 2 and to ED50 UTM zone 31N 3 depth data reduced to Mean Sea Level 4 However it is important to synchronise the P1 with the P2 file for the same survey in which it will be necessary to document the raw position data CRS the geographic 3D version of the WGS84 CRS say which chronologically would be first At a later date the position reco
196. sures applicable to each Similar record type identifiers are required for the H1 4 0 0 PREPLOTTYPEREF and H1 5 0 0 PERIMREF header records Identifiers and descriptions for some frequently required extension data types are defined in Table 17 in the P1 11 Format Description These go into the header record extension block in sub fields 1 identifier and 3 description respectively The conditionality of whether and if so by what the second sub field is required to be populated is defined in column 3 in Table 17 in the P1 11 Format Description When a parameter requires a CRSREF reference the value in the data record is to be the units described in the CRS definition The fourth sub field of the extension header description which contains the UNITREF identifier must infer the same units as the CRSREF For example to add water depth at the shotpoint location as an attribute for a marine seismic survey the airgun array is the positioning object and its 3 dimensional location would be stored in the standard position record with its depth in the vertical CRS as the vertical coordinate of a compound CRS and the water depth at the array s position stored in a record extension field reduced to the vertical datum surface defined in the extension definition block Water depth is one of the pre defined extension types extension identifier 1 The following records demonstrate this arrangement HC 1 3 0 CRS Number EPSG Code Name Source 1
197. sverse Mercator H190Projection zone Alaska State Plane 4 H200Description of grid units US Survey Ft H201Factor to metre 0 3048006096 H210Lat of standard parallel s 540000 00N H220Long of central meridian 1500000 00W H231Grid origin 540000 00N 1500000 00W H232Grid coord at origin 500000 00E 0 00N H241Scale factor 0 9999 H242Lat long scale factor H256Lat long initial line H257Circular bearing of H256 H258Quadrant bearing of H256 H259Angle from skew H26 Undefined value is replaced by ___ H300Project code and descriptionWest Foreland 2D Test TZ2D H310Line number format Line Number 1 16 OGP 74 International Association of Oil amp Gas Producers H400Type Model Polarity 1 SN428XL 0001 SEG H401Crew name Comment 1 85 H402Sample int Record Len 1 2 00 msec 12 00 sec H403Number of channels 1 1463 H404Tape type format density 1 HARD DISK SEG 8058 H405Filter_alias Hz dB pnt slope1 0 8 Nyquist Minimum Phase H406Filter_notch Hz 3dB points H407Filter_low Hz dB pnt slope 1 Out H408Time delay FTB SOD app Y N 1 0 msec Not applied H409Multi component recording 1 Z H410Aux channel 1 contents 1 Confirmation TB H411Aux channel 2 contents 1 Reference H412Aux channel 3 contents 1 Analog Uphole H413Aux channel 4 contents H414Spare H415Spare H416Spare H417Spare H418Spare H419Spare H26 Cable Recording Line 111 H600Type model polarity G1 G_LAND SM 24 SEG H601Damp coeff natural freq G1 0 67 10Hz H602Nunits len
198. t the conversion factors to convert that measurement unit to the base unit the information source from which the unit information has been derived Note that the first 4 UNITREF codes are reserved as follows UNITREF Units Quantity Type Format Reference DATATYPEREF in Field 9 Base SI Unit 1 Metres Length Floating Point 2 Metre 2 Radians Angle Floating Point 2 Radian 3 Degrees Angle Floating Point 2 Radian 4 Unity Scale Floating Point 2 Unity 8 International Association of Oil amp Gas Producers OGP Table 4 in the P1 11 Format Description contains a list of DATATYPEREF codes The example below shows in a tabular structure four HC 1 1 0 records The last two rows demonstrate how degrees can be represented in 2 different forms decimal degrees and sexagesimal DMS with unique UNITREF codes and how they are converted to their respective base SI unit Unit of Measure Unit Number Unit Name Quantity Type Name Format Reference Base Unit Number A B C D Description EPSG Unit Code Source Description Source Version Details Source Unit Code Unit of Measure 1 metre length 2 metre 9001 EPSG 7 6 9001 Unit of Measure 2 radian angle 2 radian 9101 EPSG 7 6 9101 Unit of Measure 3 degree angle 2 2 0 3 14159265 180 0 degree 9102 EPSG 7 6 9102 Unit of Measure 6 sexagesimal DMS angle 29 3 0 0 0 0 sexagesimal DMS 9110
199. tension definition and must have been defined in the HC 1 3 0 through HC 1 6 n header records Note on use of Water Depth and Point Depth Instantaneous water level in a tidal marine environment is a special case of a variable surface unsuitable in the true CRS sense as a reference surface It has been defined as a CRS in the EPSG Dataset EPSG 5831 Instantaneous Water Level depth specifically to support the P formats It therefore may be used as a CRSREF to support Water Depth and Point Depth extension records Vertical CRS Difference record extension identifier 2 The Vertical CRS Difference extension is suitable for tidal corrections and other time variant values It requires the source from and target to CRSREFs to be given in the second sub field of the extension definition in that order separated by an ampersand amp One of these may be the Instantaneous Water Level depth CRS Although the Vertical CRS Difference mechanism could be used to record the difference between any vertical CRSs it should only be used when the difference cannot be described using a coordinate transformation for example one using the EPSG Vertical Offset method 37 OGP P1 11 Geophysical position data exchange format user guide OGP Seismic Datum Offset record extension identifier 5 Seismic Datum Offset should be defined as an offset from another surface for example MSL It is an offset between two fixed surfaces and therefore
200. than Greenwich must be described and would appear in record HC 1 4 5 as follows HC 1 4 5 Prime Meridian 14 8903 Paris 2 5969213 5 grads HC 1 4 6 Ellipsoid Details The record containing the ellipsoid dimensions for a geographic CRS such as WGS84 or ED50 would appear in HC 1 4 6 as follows HC 1 4 6 Ellipsoid 1 7030 WGS 84 6378137 1 metre 298 25722356 HC 1 4 6 Ellipsoid 2 7022 International 1924 6378388 1 metre 297 Notes i In the EPSG Dataset ellipsoids may be defined using the semi major axis a and semi minor axis b If this is the case use the formula 1 a a b to calculate the value to be inserted into field 12 ii In the EPSG Dataset ellipsoids may be defined as a sphere If this is the case a b and 1 f is indeterminate The artificial value 0 should be written into field 12 Reading applications must recognise that if the value of 1 f 0 the model of the earth is a sphere rather than an ellipsoid HC 1 4 7 Vertical Datum Details Vertical CRS Only The following example contains the vertical datum details as they would appear in record HC 1 4 7 HC 1 4 7 Vertical Datum 5 5100 Mean Sea Level HC 1 4 7 Vertical Datum 10 5103 North American Vertical Datum 1988 HC 1 4 7 Vertical Datum 1
201. the data For example for a survey acquired on WGS 84 and transformed on line to ED50 for UK North Sea Transformation 1 then at a later date transformed to ED50 for Norway south of 62 N Transformation 2 the following header records would appear together in a block HC 1 7 0 Transformation Number EPSG Code Name Source 1 1311 ED50 to WGS 84 18 7 4 1 2010 02 01 EPSG HC 1 7 0 Transformation Number EPSG Code Name Source 2 1613 ED50 to WGS 84 24 7 4 1 2010 02 01 EPSG The original header will contain the transformation parameters necessary to reverse the first transformation and provide coordinates in the correct source CRS to enable the second transformation to be applied Following this explicit definitions of all coordinate transformations shall be given HC 1 8 n For each transformation all geodetic component records shall be kept as a block ordered as in the format description document i e sorted alphabetically by header record code in fields 1 through 4 Then each transformation block shall be given sorted by Coordinate Transformation Number field 6 of the HC 1 7 0 record For example HC 1 8 0 Transformation Number EPSG Code Name 1 1311 ED50 to WGS 84 18 1 HC 1 8 1 Source CRS Target CRS Version 1 1 4326 WGS 84 2 4230 ED50 UKOOA CO HC 1 8 2 Transformation Method 1 9606 Position Vector geog2D domain 1 7 HC 1 8 4 X axis translation
202. the target CRS easting ISO TC211 distance in a coordinate system eastwards positive or westwards negative from a north south reference line Note Easting may be designated e g by E x or y this is defined in the coordinate system in use with the specific CRS ellipsoid ISO TC211 surface formed by the rotation of an ellipse about a main axis Note In ISO 19111 and the EPSG Dataset ellipsoids are always oblate meaning that the axis of rotation is always the minor axis ellipsoidal coordinate system ISO TC211 coordinate system in which position is specified by geodetic latitude geodetic longitude and in the three dimensional 3D case ellipsoidal height ellipsoidal height ISO TC211 distance of a point from the ellipsoid measured along the perpendicular from the ellipsoid to this point positive if upwards or outside of the ellipsoid Note 1 Only used as part of a three dimensional ellipsoidal coordinate system and never on its own Note 2 Ellipsoidal height is commonly designated by h Note 3 See also gravity related height engineering CRS ISO TC211 coordinate reference system based on an engineering datum Example engineering plant grids well location plats 3D seismic bin grids well tracks 98 International Association of Oil amp Gas Producers OGP term definition engineering datum ISO TC211 datum describing the relationship of a coordinate system to a local reference Exa
203. tion Processing Contractor NCS SubSea HC 1 0 0 Reference Systems Summary 21 1 7 1 HC 1 1 0 Unit of Measure 1 metre length 2 metre 9001 EPSG Dataset 7 9 9001 HC 1 1 0 Unit of Measure 2 radian angle 2 radian 9101 EPSG Dataset 7 9 9101 HC 1 1 0 Unit of Measure 3 degree angle 2 2 0 180 3 141592654 0 degree 9102 EPSG Dataset 7 9 9102 HC 1 1 0 Unit of Measure 4 unity scale 2 unity 9201 EPSG Dataset 7 9 9201 HC 1 1 0 Unit of Measure 5 US survey foot length 2 1 0 12 39 37 US survey foot 9003 EPSG Dataset 7 9 9003 HC 1 1 0 Unit of Measure 6 second time 11 second POSC Units of Measure Dictionary 2 2 s HC 1 1 0 Unit of Measure 7 second time 12 second POSC Units of Measure Dictionary 2 2 s HC 1 1 0 Unit of Measure 8 milliseconds time 2 11 0 0 001 1 0 milliseconds POSC Units of Measure Dictionary 2 2 ms HC 1 1 0 Unit of Measure 9 hertz frequency 2 hertz POSC Units of Measure Dictionary 2 2 Hz HC 1 1 0 Unit of Measure 10 bel level of power intensity 2 bel POSC Units of Measure Dictionary 2 2 B HC 1 1 0 Unit of Measure 11 decibel level of power intensity 2 10 0 0 1 1 0 decibel POSC Units of Measure Dictionary 2 2 dB HC 1 1 0 Unit of Measure 12 bels octave attenuation 2 bels octave POSC Units of Measure Dictionary 2 2 BPO HC 1 1 0 Unit of Measure
204. to fit onto one line they have been wrapped and inset onto the next line In some cases the space characters contained in a Description field are replaced by an ellipsis The format however in practice requires each record to be written to one line and ends with a carriage return line feed character As several of the P1 11 record definitions are common with the OGP P2 11 Positioning Data Exchange Format and P6 11 Seismic Bin Grid Data Exchange Format this User Guide applies equally to the common records in these other formats 2 International Association of Oil amp Gas Producers OGP 3 OGP P1 11 Geophysical position data exchange format user guide OGP 1 Preliminary Information 1 1 Introduction The OGP P1 11 format replaces the UKOOA P1 90 SEG P1 and other legacy positional exchange formats and is designed for the exchange of position data typically resulting from in field survey operations such as geophysical including seismic hydrographic etc The purpose of this User Guide is to provide examples and guidelines for best practice in generating the necessary information metadata and identity geodetic information as well as defining the coordinate information position data to accurately convey and exchange such data The format will typically contain positions of an energy source and the corresponding receiver positions However P1 11 may also be used to convey positions of other objects for
205. tude of natural origin 1 8801 54 3 degree HC 1 5 2 Longitude of natural origin 1 8802 150 3 degree HC 1 5 2 Scale factor at natural origin 1 8805 0 9999 4 unity HC 1 5 2 False easting 1 8806 500000 5 US survey foot HC 1 5 2 False northing 1 8807 0 5 US survey foot HC 1 6 0 Coordinate System 1 4497 Cartesian 2D CS 2 Cartesian 2 HC 1 6 1 Coordinate System Axis 1 1 1 37 Easting east X 5 US survey foot HC 1 6 1 Coordinate System Axis 2 1 2 38 Northing north Y 5 US survey foot HC 1 4 0 CRS Number EPSG Code Type Name 2 4267 2 Geographic 2D NAD27 HC 1 4 4 Geodetic Datum 2 6267 North American Datum 1927 HC 1 4 5 Prime Meridian 2 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 2 7008 Clarke 1866 6378206 4 1 metre 294 97869820 HC 1 6 0 Coordinate System 2 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 2 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 2 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 3 5702 5 Vertical NGVD29 height HC 1 4 7 Vertical Datum Details 3 5102 National Geodetic Vertical Datum 1929 HC 1 6 0 Coordinate System 3 6497 Vertical CS Axis height Orientation up UoM ftUS 5 Vertical 1 HC 1 6 1 Coordinate System Axis 1 3 1 112 Gravity related height up H 5 US survey foot HC 1 4 0 CRS Number EPSG Code Type Name 4 5 Vertical Sea Level Depth HC 1 4 7 Verti
206. uality Data Recorded 3 1 0 S1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 G2 1 391297 20 4092985 70 36 97671040 16 22131009 36 97671040 16 22131009 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 2 G1 1 391341 10 4092961 70 36 97649917 16 22081351 36 97649917 16 22081351 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 G2 1 391297 20 4092985 70 36 97671040 16 22131009 36 97671040 16 22131009 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 4 G2 amp S1 1 391436 30 4092730 50 36 97442649 16 21971087 36 97442649 16 21971087 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 5 G2 amp S2 1 391392 60 4092755 00 36 97464225 16 22020526 36 97464225 16 22020526 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 6 G2 amp S3 1 391349 00 4092779 40 36 97485712 16 22069852 36 97485712 16 22069852 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 7 G2 amp S4 1 391305 30 4092803 90 36 97507287 16 22119292 36 97507287 16 22119292 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 8 G2 amp S5 1 391261 60 4092828 30 36 97528773 16 22168731 36 97528773 16 22168731 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 9 G2 amp S6 1 391218 00 4092852 70 36 97550259 16 22218057 36 97550259 16 22218057 P1 0 T21021P1002 1001 1 2010 246 14 56 23 0 3 amp 10 G2 amp S7 1 391174 40 4092877 20 36 97571835 16 22267386 36 97571835 16 22267386 P1 0 T21021P1002 1001 1 201
207. uch a discrepancy by which a position record can additionally be written in the original or hub geographical CRS such as WGS 84 This would not be necessary if WGS 84 was already defined as the primary or contractual CRS Such repetition of positions should never substitute for fully expounded definitions in the file header The file header should never be separated from the data 16 International Association of Oil amp Gas Producers OGP 2 4 4 Coordinate Reference Systems Coding Summary The CRS section of the Common Header consists of the following blocks HC 1 3 0 CRS implicit identification HC 1 4 n through HC1 6 n CRS details explicit definition with HC 1 4 n CRS information and datum details HC 1 5 n Map projection details HC 1 6 n Coordinate System and axis definitions HC 1 7 0 Coordinate transformation implicit identification HC 1 8 n Coordinate transformation details explicit definition HC 1 9 0 Example point conversions transformations 2 5 Coordinate Reference Systems Worked Examples ISO 19111 identifies several types of coordinate reference system Those relevant to the P formats and the coordinate fields required for each category are given in Table 9 in the P1 11 Format Description The following examples demonstrate the flexibility of the P1 11 format to cater for any CRS or combination of CRSs see CRSTYPEREF Table 10 in P1 11 Format Description 1 Projected 2 Geographic 2D 3 Geogr
208. und Horizontal CRS 4 1 ED50 UTM zone 31N HC 1 4 2 Compound Vertical CRS 4 3 MSL depth HC 1 4 0 CRS Number EPSG Code Type Name 5 4326 2 geographic 2D WGS 84 HC 1 4 4 Geodetic Datum 5 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 5 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 5 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 5 6422 Ellipsoidal 2D CS 3 ellipsoidal 2 HC 1 6 1 Coordinate System Axis 1 5 1 106 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 5 2 107 Geodetic longitude east Long 3 degree HC 1 4 0 CRS Number EPSG Code Type Name 6 4979 3 geographic 3D WGS 84 HC 1 4 4 Geodetic Datum 6 6326 World Geodetic System 1984 HC 1 4 5 Prime Meridian 6 8901 Greenwich 0 3 degree HC 1 4 6 Ellipsoid 6 7030 WGS 84 6378137 1 metre 298 257223563 HC 1 6 0 Coordinate System 6 6423 Ellipsoidal 3D CS 3 ellipsoidal 3 HC 1 6 1 Coordinate System Axis 1 6 1 108 Geodetic latitude north Lat 3 degree HC 1 6 1 Coordinate System Axis 2 6 2 109 Geodetic longitude east Long 3 degree HC 1 6 1 Coordinate System Axis 3 6 3 110 Ellipsoidal height up h 1 metre HC 1 7 0 Transformation Number EPSG Code Name Source 1 1311 ED50 to WGS 84 18 7 6 2010 11 02 EPSG HC 1 7 0 Transformation Number EPSG Code Name Source 2 15593 geographic3D to geographic2D 7 6 2010 11 02 EPSG HC 1 8 0 Transformation Number EPSG Code Name 1 1311 ED50 to WGS 84 18 1 HC 1 8 1 Source CRS Target CRS Version 1 2 4230
209. urvey Foot HC 2 2 1 Crossline Dimension of Group 3 6 0 5 US Survey Foot HC 2 2 1 Inline Distance Between Elements in the Group 3 7 0 5 US Survey Foot HC 2 2 1 Crossline Distance Between Elements in the Group 3 8 0 5 US Survey Foot CC 1 0 0 Fairfield Z 700 Marine Node Line 102 CC 1 0 0 3 Geophones Oyo Geospace X Phone LT Omniphone CC 1 0 0 1 Hydrophone High Tech HTI 96 MIN 10hz HC 2 2 0 Fairfield Marine Nodal System 3 Geo 1Hydrophone 5 R2 MULTI Component Z 700 HC 2 2 1 Polarity 5 1 SEG HC 2 2 1 Damping Coefficient 5 2 0 67 HC 2 2 1 Natural Frequency 5 3 N A HC 2 2 1 Number of Elements in Group 5 4 1 HC 2 2 1 Inline Dimension of Group 5 5 1 0 5 US Survey Foot HC 2 2 1 Crossline Dimension of Group 5 6 1 0 5 US Survey Foot HC 2 2 1 Inline Distance Between Elements in the Group 5 7 0 5 US Survey Foot HC 2 2 1 Crossline Distance Between Elements in the Group 5 8 0 5 US Survey Foot HC 2 3 0 Orica Seismic Explosive Range Osx 6 E1 7 Explosive Osx 8 Z HC 2 3 1 Polarity 6 1 SEG HC 2 3 1 Total Charge Size 6 2 1 1 21 pounds mass HC 2 3 1 Vertical Fold of Stack 6 5 1 HC 2 3 1 Number of Elements in Pattern 6 7 10 HC 2 3 1 Inline Dimension of Pattern 6 8 40 5 US Survey Foot HC 2 3 1 Crossline Dimension of Pattern 6 9 10 5 US Survey Foot HC 2 3 1 Inline Distance Between Elements in the Pattern 6 10 10 5
210. water surface tidal elevation c both at time of recording and the airgun array depth e Point depth also at time of recording The vertical offsets required for the nearshore section would be handled using the record extension field definition just described above Figure 5 selecting the appropriate vertical CRSREF for the reference surface in sub field 2 For the onshore sections a compound CRS can be defined in the Common Header to provide for the land surface height a and a1 and a standard record 39 OGP P1 11 Geophysical position data exchange format user guide OGP extension field definition will be required for the charge depth d In the Common Header the HC 2 3 0 record defines the positioning objects assigning OBJREF numbers field 6 to each source type underlined HC 2 3 0 Land Source 1 Surface Position 1 Vib 6 Vibroseis VP 1 HC 2 3 0 Land Source 2 Surface Position 2 SP 7 Dynamite SP In the P1 specific header the H1 1 0 0 record defines the CRS and TRS of each source type through the P1TYPEREF number field 6 underlined where CRSREF 1 is a compound CRS H1 1 0 0 Position Record Type Definition 1 1 2 1 1 0 H1 1 0 0 Position Record Type Definition 2 1 2 1 1 1 9 Charge Depth 1 Charge depth has a pre defined record extension identifier 9 A comment record would be requi
211. y intended for raw navigation data recorded in P2 11 It is recommended that if the P1 11 file is written using a time system that is not the system used during acquisition then both time reference systems should be defined in the Common Header with an Example Time Conversion record HC 1 2 1 that defines the relationship For example HC 1 2 0 Time Reference System 1 1 0 0 UTC 0 5 HC 1 2 0 Time Reference System 2 2 15 0 GPS 0 1980 01 06 6 HC 1 2 1 Example Time Conversion 1 1 2011 02 04 13 19 59 0 2 980860814 0 2 4 Coordinate Reference Systems HC 1 3 0 to HC 1 6 1 2 4 1 Concepts and Definitions The OGP P formats Common Header allows any coordinate reference system CRS in use in the oil and gas industry to be defined in the CRS section The format follows the classification of coordinate reference systems recommended by the Geodesy Subcommittee of the OGP Geomatics Committee who maintain the EPSG Geodetic Parameter Dataset The classification adopts some fundamental premises that are included below as context for the section on CRSs which follows terms in italics are defined in the Glossary A coordinate is one of a sequence of numbers designating the position of a point in space A coordinate tuple is a sequence of coordinates describing one position Coordinates even latitude and longitude are ambiguous unless their reference system

OGP P1/11 Geophysical position data exchange format – user guide

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OGP P1/11 Geophysical position data exchange format – user guide