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SURPAC Software User`s Manual - Book #3 (Google Earth Functions)

1. The Co ordinate File should have appropriate constants set If no constants are used then both the Y an X ordinates must have their full values As a starting default the programme will assume the Y X search position as being the centre of gravity of all existing Points in the current Co ordinate File The programme will use the further defaults of a Search Radius of 20Km and the Number of Points to display as 25 The results of this default search will be displayed You may now change any of the search parameters required as mentioned on the previous page NB The information line displayed for each Station is too long to be displayed in total on a standard display page To view the full Station information use the horizontal scroll bar at the bottom of the data display Each displayed Station will initially have a green tick displayed next to it at the right hand side of the display This implies that the Station is a required Station which would be added to the current Co ordinate File when the Store and Exit Button is clicked or displayed on Google Earth when the View List on Google Earth Button is clicked If any Station is not required then either click on that Station s green tick or Double Click on any one of the displayed Station data items The symbol will be changed to a red cross and the Bench Mark s co ordinate display will be changed to a grey italic font This Station will now be flagged as not
2. and follow the on screen instructions for installing this software The basic version of Google Earth is free and is quite suitable for the SURPAC interface functions discussed below There is the option of the Google Earth Pro version but at a cost of US 400 about R2 500 The currently loaded Co ordinate file in SURPAC must use either the WGS 84 ellipsoid the GRS80 ellipsoid or any other ellipsoid having the same parameters as the WGS 84 ellipsoid 3 Areasonably fast ADSL or 3G wireless internet connection Setting Google Earth Display for SURPAC Data and Overlays 1 The SURPAC data displayed on Google Earth does not always provide an exact visual fit on to the satellite imagery In order to force the displayed data to fit as close as possible to the imagery you can use the Google Earth Ruler tool to determine the Y X or E N shifts to be applied to the SURPAC data or image so that it best fits the imagery Line Path Pro Measure the distance between two points on the ground Map Length 0 00 Meters Ground Length 0 00 Heading 0 00 degrees V Mouse Navigation SURPAC Software User s Manual Book 3 2 A plan or sheet that is displayed on Google Earth as an overlay can have varying levels of transparency applied to it Increasing an overlay s transparency allows more of the imagery lying under the overlay to become visible Setting a zero transparency
3. 2 Once the CAD sheet Line and Point data have been transferred Google Earth will shift its location to the centre of the imagery covered by the data and will display the data viewed from an appropriate height The Orientation is set to North and there is no Tilt applied All viewing settings can be User modified from within Google Earth Clicking on a displayed Point will show a text balloon containing the Point s values and information Page 11 SURPAC Software User s Manual Book 3 12mm Round Iron Peg SURPAC Surveying Software A proposed layout showing Lines and Points on Google Earth Viewing a SURPAC CAD Sheet on Google Earth Notes One problem associated with using a CAD Sheet as an overlay is that of the Meridian Convergence Since a CAD Sheet is always oriented to Grid North the True North at the Central Meridian of the projection and not to True North at the Sheet position SURPAC has to swing the CAD Sheet display so as to re orient it to True North for the Google Earth display Before the image of a CAD Sheet is sent to Google Earth as an overlay you will notice it being re drawn in SURPAC This is to both re orient the Sheet for Meridian Convergence as explained above and to set the Sheet scale to the defined plotting scale This latter action is to ensure a clearer Sheet image on Google Earth For the Windows Vista 7 8 operating systems which have better graphic Page 12 SURPAC Software User s Ma
4. Latitude Longitude Y Co ord X Co ord System Height AuxHeight Direction Distance Field 1 24 21 06 1847 S 30 56 59 5156 E 5087 319 2694246 124 WG31 498 683 230 04 25 2917 809 2 24 21 05 9458 S 30 56 59 3498 E 5091 997 2694238 776 WG 31 498 470 229 54 15 2918 951 3 24 21 09 4011 S 30 57 02 8436 E 4993 479 2694345 051 WG31 501 251 232 44 11 2929 444 4 ST1 24 21 02 1832 S 30 56 56 7496 E 5165 332 2694123 036 WG 31 496 399 227 15 28 2940 532 5 STD1 24 21 05 0855 S 30 57 01 0085 E 5045 251 2694212 290 WG 31 499 845 230 05 38 2971 785 6 STD2 24 21 05 6611 S 30 57 01 7167 E 5025 283 2694229 993 WG 31 501 133 230 36 07 2975 862 7 STC1 24 21 06 8257 S 30 57 03 1639 E 4984 478 2694265 810 WG 31 502 686 231 37 50 2985 142 8 STB2 24 21 04 3298 S 30 57 01 6606 E 5026 880 2694189 031 WG31 501 064 229 58 42 3000 805 9 STC2 24 21 05 3156 S 30 57 02 7095 E 4997 303 2694219 352 WG31 502 004 230 47 02 3004 253 10 STC3 24 21 05 9475 S 30 57 03 4306 E 4976 972 2694238 788 WG 31 502 675 231 18 56 3007 846 11 STD3 24 21 05 0089 S 30 57 02 8569 E 4993 151 2694209 913 WG 31 502 140 230 41 41 3013 441 12 STD 24 21 03 5916 S 30 57 01 6087 E 5028 351 2694166 319 WG 31 501 525 229 37 47 3014 340 24 21 03 0927 S 30 57 01 6893 E 5026 085 2694150 968 WG 31 501 656 229 26 10 3026 026 14 STA2 24 21 03 6155 S 30 57 02 1924 E 5011 896 2694167 049 WG 31 501 809 229 50 31 3026 424 15 STB 24 21 03 4963 S
5. assuming that Google Earth has been installed You should see the figure stand polygon shown on Google Earth as a half transparent cyan polygon To display the Polygon s Name Number headings Link Files and Image Files Click anywhere inside this displayed polygon NB The hyperlink Link File called Data File txt where is the given Name Number for the Image Polygon will automatically be included in the list of Link Files This Link File consists of System and Geographical co ordinates for all the polygon points plus the polygon area To display the contents of a hyperlink Link Files right Click on the hyperlink Google Earth will then switch to its display page and display the contents of the file If the file does not display and the loading bar stays on the form then just click the refresh button at the top of the screen Page 43 SURPAC Software User s Manual Book 3 To display an Image in full size right Click on the Image Google Earth will then switch to its display page and display the full size Image X 7160 AR Surveying Instruments in the 20th century A photographic Collection of old Instruments Polygon Info File 7160 Data File txt 1920 Hilger amp Watts Vernier Theodolite SURPAC Software User s Manual Book 3 Creating Hatched filled Polygons for Exporting to Google Earth The previous section explains how it is possible to set up a Hatched I
6. changed by selecting the required path using the Drive and Directory selection boxes above the file display The Image type displayed can be selected using the file Type selection box below the file display NB The only Image file types that may be used are JPEG jpg Bitmap bmp or GIF gif files Clicking on a file Name in the File selection box will display the image in the image holder at the top centre of the form To select this file as the Image for the Current Image double click on the file Name Image File Headings Each Image used for an Image Placemark or Image Polygon can have its own Heading For example for Image 1 position the cursor in the input box directly below the heading Image 1 Heading enter the heading required for that Image Repeat this for all Images that are used Image Sizes You can set the size of each Image included in the Placemark or Polygon KML file Image width values may be selected from 75 pixels up to 600 pixels The default value is 300 pixels These are the sizes of the Images that will be shown when you click on a Placemark or Polygon in Google Earth The actual size of the Image itself is not changed Once in Google Earth you can right Click on a displayed Image in order to display it full size Placemark or Polygon General Headings At the bottom left of the form are input boxes for up to 9 General Headings These headings may be used for any descriptive purpose to help desc
7. description surveyed heights and interpolated Google Earth heights will be shown These height comparisons are imported at a rate of approximately 350 500 Point heights per minute depending on your internet connection Statistical data relating to the comparison of heights are shown at the bottom of the form 3 2 View 3D Contours amp DTM on Google Earth Once all the contours have been generated and edited using the Surface Triangulation method you can view the contours alone or the contours and the solid 3D model created from the surface triangulation in situ on the Google Earth surface Using this Option Click on the File main menu heading and then select View Contours amp DTM on Google Earth menu option On the displayed form first read the help information by clicking on the icons to see the implications and use of the available options especially with regard to the two Surface Options These options Page 29 SURPAC Software User s Manual Book 3 allow for the display to be clamped to the Google Earth surface or to have it shown as a free standing 3D model The former method would be used for Contours that represent the natural earth surface and the latter for both Contours and DTMs of manmade features such as stockpiles dumps and earthworks NB Google Earth will not display any imported KML data that lie below its own surface Irying to display an excavation for example is not possible if the ex
8. displayed in which the file Points their co ordinates description surveyed heights and interpolated Google Earth heights will be shown These height importations are imported at a rate of approximately 350 500 Point heights per minute depending on your internet connection Statistical data relating to the comparison of heights are shown at the bottom of the form Page 28 SURPAC Software User s Manual Book 3 3 Contour Generating CAD Programme 3 1 Compare existing heights with interpolated Google Earth Heights This function is the same as that described Tacheometric File Editing Programme above Using this Option 3 1 1 Comparing a Single Point Hight click on the Spot Height that is to be compared and then from the Spot Heights menu heading select Compare Spot Height with Google Earth Height for a single Point A form will then be displayed showing the Point selected its co ordinates and height the Google Earth height and the difference Moving the cursor away from this form will cause it to be removed e Comparison of Surveyed Height with Google Earth Iterpolated Height Point Number Y Co ordinate X Co ordinate SpotHeight GE Height Difference 779 7471751 3085961 19 125989 126035 0 46 3 1 2 Comparing the entire file Click on the Spot Heights menu heading and select Compare Entire File with Google Earth Heights A form will be displayed in which the Tacheometric file Points their co ordinates
9. Contrast Images required for background information may need their brightness and or contrast adjusted to avoid the Images interfering with the display of Lines and Text To do this right Click on the Image click the Image menu heading and then select either of the Adjust Image Brightness or the Adjust Image Contrast menu options On the displayed form use the slide bars to set the required brightness and contrast values Page 22 SURPAC Google Earth Elevation Functions These SURPAC Google Earth functions make use of the importation of height data interpolated via the Google Earth Elevation API This function allows for the interpolation of heights of locations anywhere on the Google Earth DTM Summary Based on tests carried out on data samples in areas in South Africa it would appear that the interpolated Google Earth heights are in general accurate to about 3 4 metres This figure can be improved to below the 2m level however by carrying out a comparison between surveyed ground heights and Google Earth derived heights for selected points in an area and then adjusting the interpolated Google Earth heights for the mean area height difference These results must be seen as estimates and might not be applicable in your area This can best be tested by using ground control points for comparison Nearby standard Trigonometrical Beacons can also be used for ground control bear in mind that the Beacon height is the top of the pill
10. Save the file in the same folder as the associated Polygon normally the C Surpac_GE folder NB The Google Earth Pro application is able to create image files at a higher resolution than the standard Google Earth However the Pro version is not free and costs about US 400 Importing the Google Earth Image to a SURPAC General CAD Sheet In the SURPAC General CAD programme ensure that the sheet size and scale are correct for the Image to be imported Then import the Image bounding diagonal line via the Path KML file created above which defines the Image size and position see above by using the Import Lines from Google Earth KML File menu item On the CAD Sheet locate the cursor at the approximate centre of the Polygon then click the Mouse RHB Click the Image menu heading and then select the Add Import a Sheet Image menu item On the Image Selection form set the required path and then click on the required Image file On the right hand side of the form deselect the Maintain the Image Width and Height Ratio option and se ect the Apply Meridian Convergence to Image option NB This last setting is important as it is necessary for SURPAC to apply a small rotation to the incoming Image to compensate for Meridian Convergence This due to the Google Earth Image being oriented to True North and the SURPAC Image being oriented to the Grid North i e the True North at the central meridian The Sheet will then be automatically re orient
11. User s Manual Book 3 M m SURPAC 20m Conor of Table Mountain using Mid Google Earth DTM heights 4 Longitudinal Sectioning Programme This function allows for the generation of Longitudinal Sections by the direct importation of interpolated Google Earth DTM Heights Using this Option Click on the Set File Type menu item in the Actions Bar menu On the displayed form select the Section Plotting Using a LONG SECTION File only option and Click the OK button Click on the Select a File menu item in the Actions Bar menu From the displayed form enter the new File Name and Click on the Open button Once the Long Section Creation Editing form is displayed Click on the Options button From the displayed list select the Generate Sections from defined Bend Points and Google Earth Heights option and then Click the OK button Page 33 SURPAC Software User s Manual Book 3 Long Section Creation Editing Chainage Level Description Side Slope v Edit 0 000 34 742 t1 L3 0 000 L1 50 000 100 000 150 000 200 000 250 000 300 000 350 000 400 000 450 000 110 719 500 000 121 072 550 000 130 859 600 000 650 000 700 000 750 000 255 926 800 000 850 000 301 107 900 000 950 000 336 256 C Long Section File Creation Options Generate Sections from a Tacheometric File plus defined Bend Points interpolate Sections from a Tacheometric File plus defined Bend Points Cr
12. applicable are KML files saved from the Locate and Add Nearest Trig TSM Beacons programme are called FileName Trigs kml where FileName is the name of the current Co ordinate file KML files saved from the Co ordinate File Editing programme are called PointName Point Group kml where PointName is the name of the first Point selected marked in the current Co ordinate file KML files saved for Lines and Points from the General CAD programme are called FileName CAD Lines kml where FileName is the name of the current Co ordinate file KML and PNG files saved for Sheet overlays from the General CAD programme are called FileName CAD Sheet kml and FileName CAD Sheet png where FileName is the name of the current Co ordinate file KML files saved for Lines and Points from the General Plan programme are called FileName GP SheetX Lines kml where FileName is the name of the current Co ordinate file and X is the current GP Sheet number KML and PNG files saved for Sheet overlays from the General Plan programme are called FileName GP SheetX kml and FileName GP SheetX png where FileName is the name of the current Co ordinate file and X is the current GP Sheet number KML files saved for Lines and Points from the Working Plan programme are called FileName WP SheetX Lines kml where FileName is the name of the current Co ordinate file and X is the current WP Sheet number KML and PNG files saved for Sheet overlays fr
13. as not required and will not be added to the current Co ordinate File Clicking a Points red cross will reverse the above process Click the Print List Button to send all those located Points in the list that have green tick symbol next to them to the SURPAC Printing form From this form display this list may be sent to the current Printer to a User defined ASCII file or to the Windows Clipboard When the Store and Exit Button is clicked all located Points displayed in the list and having the green tick symbol next to them will be added to the current Co ordinate File By clicking on the Google Earth icon on the form it is possible to send the list of selected Trig Beacons and or Town Survey Marks TSMs to Google Earth for a spatial view of the set of Trig beacons SURPAC Software User s Manual Book 3 By clicking on a Trig Beacon TSM symbol on the Google Earth display the Trig s co ordinate and height information is displayed see below Displaying the Nearest Trig TSM Beacons on Google Earth 1 In SURPAC run the Locate and Add Nearest Trig TSM Beacons programme from the Conversions main menu heading if your SURPAC License has this Module oet the search options at the bottom of the form so as to display the required number and type of beacons From the displayed list of beacons remove any unwanted beacons by clicking on the green tic shown at the end of each display line The green tic will chang
14. be used to import and display the Google Earth heights of the located Bench Marks In this case the differences between the actual Bench Mark heights and their Google Earth DTM values will be displayed These height differences may be used to adjust raise or lower a set of imported grid heights from the Google Earth DTM for contouring purposes The Bench Mark Y X co ordinates are those supplied by the NGI and unfortunately their positions are only approximate having an accuracy in the order of only 15 metres We have requested from the NGI images of the locality sketches that could then be attached to a KML display of a set of Bench Marks This would make the location of the Bench Marks in the field a lot simpler As yet we have had no response to this request from the NGI Hopefully we will be able to add this feature at a later date Apart from using the Bench Marks to control the heighting of surveys such as control surveys for road rail or pipe line construction the Bench Marks around an area of proposed development can be used to adjust a set of imported Google Earth DTM grid heights used for example for the purpose of a preliminary contour display model of a proposed development site In general there is a height shift between Google Earth DTM interpolated Page 47 SURPAC Software User s Manual Book 3 heights and the actual ground heights represented by the Bench Marks A comparison between the two sets of heights
15. can be used to determine the local height shift to be applied to the Google Earth DTM values When comparing Google Earth DTM heights with the Bench Mark heights it is important to bear in mind the following limitations 1 Due to the approximate positioning of the Bench Marks avoid points that lie on steep ground 2 Some Bench Marks are studs placed on the plinths of Trig beacons In these cases the heights of the Trig pillars normally 1 4m need be taken into account Using the Locate and Add Nearest Bench Marks programme NB This programme forms a part of the Conversions Module and this Module must be an active part of the SURPAC License in order to be able to access the programme The programme is loaded from the Conversions Menu when selecting the Locate and Add Nearest Bench Mark Menu ltem If the current Co ordinate file is empty the programme will display a warning message and abort as the Co ordinate file must contain at least one Point in order for this programme to work The Co ordinate file should have appropriate constants set If no constants are used then both the Y an X ordinates must have their full values As a starting default the programme will assume the Y X search position as being the centre of gravity of all existing Points in the current Co ordinate file The programme will use the further defaults of a Search Radius of 50Km and the number of Points to display as 10 The results of this defa
16. clicking on the first Point in the block and then dragging the cursor onto the last Point or by clicking on the first Point in the block then holding SURPAC Software User s Manual Book 3 down the Shift key and simultaneously clicking on the last Point in the block 2 2 You can mark individual Points by clicking on the first required Point and then whilst holding down the Ctrl key click on any other required Points 2 3 You can mark Points by Description by clicking on the File Options button and then selecting the Select Points to be Highlighted by Description option Then select the required Descriptions from the displayed list Google Earth Options Set View Google Earth Display Options 0 Select Points to be Highlighted by Description Compare File and Google Earth Heights Import interpolated Google Earth Heights C 3 After selection Click the Export GE KML button on the Actions Bar menu The Points selected will be displayed at their surface positions on the satellite imagery by Google Earth Either a Point a Trig Beacon or a TSM symbol icon will be used to mark the displayed Points as is appropriate To obtain a Point s information click on the Point required A balloon text display will appear showing The Point Name The Point Description The Co ordinate System e g WG29 The Beacon Y X and Z values or E N and H values The Beacon Latitude and Longitude The Google Earth icons
17. depending on your internet connection d M un Po ae m az zt s fran ng mI V mace X t ut En ur mr omm nug d xS x j P n A AE E m ja 1 AN Sy i 1 HUE j pm am v KY ts z H E NM n SURPAC Contour CAD with imported Google Earth data on a 50m Grid This generated Tacheometric file can then be used in the SURPAC Contouring CAD programme to construct and edit contour lines using the Triangulation method over the quadrilateral area in the usual way Page 27 SURPAC Software User s Manual Book 3 The two preceding images and the following one show the stages of generating a contour display from imported Google Earth points i e defining an area importing the data creating the Contours and then displaying these contours on Google Earth via a KML file Google earth X gt a d p 3 c SPRY imagery Date 12 22 2009 2004 2554320 52 S 27 50 m SURPAC generated 5m Contours of Hartebeespoort dam wall area using Google Earth DTM heights 2 2 Compare Existing heights with interpolated Google Earth Heights This function allows you to compare existing Tacheometric file heights with interpolated heights from the Google Earth DTM This function is useful when needing to evaluate the accuracy of imported Google Earth Heights against surveyed values Using this Option In the Actions Menu click on the Compare GE Hts A form will be
18. import the Placemark data into a Co ordinate file first ensure that the file System is set to either the WGS 84 or GRHS80 ellipsoids and that the Central Meridian of the WG System or Zone is correct for the Point data to be imported In the SURPAC Co ordinate File Editing programme click on the Import GE KML button on the Actions bar menu From the displayed File Selection form select the KML file that contains the required Placemark information The Placemark position s will then be converted to its their equivalent Y X or E N co ordinate values and Page 18 SURPAC Software User s Manual Book 3 saved into the current Co ordinate file using the Placemark name s as the new Point name s If the Placemark does not contain a recognizable Name SURPAC will use the default Names of KML1 KML2 etc Transferring a Google Earth Path Line or Polygon to a SURPAC General CAD Sheet Creating a Path or Polygon in Google Earth In Google Earth ensure that either the Toolbar or Sidebar are displayed Move the Google Earth display to show the required area at the required scale A Path may be a single Line or a series of connected Lines To create a Polygon click the appropriate toolbar icon or select either the Path or the Polygon menu item found under the Add menu heading The new Path or new Polygon Dialog Box appears and the cursor changes to a square drawing tool Enter the properties for your drawing and give the
19. load data for this Placemark or Polygon However it can be useful to load or Import data from another kim file For example if you have a large number of Placemarks to create and all Placemarks have the same or similar Headings then you can import these Heading and any other common information into a new Placemark or Polygon These data can then be edited as required Create a Combined KML file for all KML files in the folder Button After the completion of all required Image Placemarks or Image Polygons the KML files for these items can be combined into a single KML file This file will contain all the KML information for the Image Placemarks or Image Polygons in the current sub folder A MH2 RSA WG System Hartebeesthoek94 Datum System WG 23 Y 70435 967 X 2817287 029 Z 1031 903 Lat 25 27 38 9468S Lon 23 42 01 2755E Top level Invert level Pipe 1 0 87m Invert level Pipe 2 0 67m Manhole Inside Diameter 0 90m Link File short report pdf Link File Bray tet Man Hole 3 Photo SURPAC Software User s Manual Book 3 This is a convenient way of displaying all Placemarks or Polygons on Google Earth by using a single command especially if you intend sending the information to a third party These files will have the name This is a convenient way of displaying all Placemarks or Polygons on Google Earth by using a single command especially if you intend se
20. required and will not be added to the current Co ordinate File or displayed on Google Earth Clicking a Point s red cross or Double Clicking on any one of the displayed Station data items will reverse the above process NB The Select All and De Select All Buttons can be used to designate all Stations as Selected Required or De Selected Not Required respectively A Station may be Deleted from the My Stations file by highlighting the required Station line by Clicking on it and then Clicking the Delete Point Button Once a Station has been Deleted it can only be replaced by Adding it from the appropriate Co ordinate File as described above Click the Print List Button to send all those located and selected Stations to the SURPAC printing form From this form this list may then be sent to the Page 55 SURPAC Software User s Manual Book 3 current Printer to a User defined ASCII file to an Excel file or to the Windows Clipboard NB Due to the width of the information data lines for the Stations it is best to send the display to an Excel where the full display information data is included When the Store and Exit Button is clicked all located Stations displayed in the list and having the green tick symbol next to them will be added to the current Co ordinate File As long as Google Earth is installed on the computer the selected list of Stations may be sent to Google Earth via a KML file to pr
21. s Manual Book 3 If the current Co ordinate File is empty the programme will display a warning message and abort The Co ordinate File must contain at least one Point in order for this programme to work The Co ordinate File should have appropriate constants set If no constants are used then both the Y an X ordinates must have full values As a starting default the programme will assume the Y X search position as being the centre of gravity of all existing Points in the current Co ordinate File The programme will use the further defaults of a Search Radius of 15Km and the number of Points to display as 10 The results of this default search will be displayed You may now change any of the search parameters required including e he search centre position e he number of located Points to display e he maximum search radius e The type of Points to locate and display Trig Beacons TSMs or both e The display order of located Points by Distance Direction or Name Each displayed Point will initially have a green tick displayed next to it This implies that the Point is a required Point which would be added to the current Co ordinate File when the Store and Exit Button is clicked If any Point is not required then click on that Point s green tick The Points symbol will be changed to a red cross and the Point s co ordinate display will be changed to a grey italic font This Point will now be flagged
22. used for Co ordinate file Points are F1 Trigonometrical Beacons K Town Survey Marks Q Survey Beacons Points Page 10 Interfacing SURPAC CAD programmes with Google Earth These functions apply to the General CAD Contour CAD General Plan CAD Sectional Title CAD and Working Plan CAD programmes Note that the Contour CAD programme only has the Viewing a SURPAC CAD Sheet on Google Earth option available Viewing a SURPAC CAD Sheet s Lines and Points on Google Earth Note If the Point Display option is On then only the Points that have been Named by using the PN Command will be displayed on the Google Earth overlay If only Lines Arcs and Circles are required for the Google Earth display then Click the Text menu heading in the CAD programme and turn the display of Points OFF All Lines will be shown in the User selected style width and colour Refer to the options discussed on Page 2 SURPAC will display dotted and or dashed Lines as such on Google Earth SURPAC will also display Circles and Arcs correctly on Google Earth All Points will be marked by either the SURPAC Point marker or in the case of Trig Beacons and TSMs the appropriate control point symbol 1 In the CAD programme click on the File main menu heading and then select the View Lines and Points on Google Earth menu item Note f the Point Display has been turned Off then this menu item will read View Lines on Google Earth
23. 0 1 036 325 1 037 504 1 052 526 Search Options Set the Search Y X Centre Position All Points Set the Maximum Search Radius Kms GE Height 1 040 321 1 050 232 1 048 532 1 051 325 1 042 029 1 051 906 1 039 995 1 054 996 1 048 331 1 049 690 1 049 397 1 055 622 1 046 899 1 056 000 1 042 069 1 042 705 1 056 924 Co ordinate System WG 23 Hartebeesthoek94 Datum WGS 84 Hght Diff Direction Distance 7 13 118 44 41 340m 9 27 348 08 36 465m 7 06 331 01 03 486m 9 93 340 51 47 502m 7 67 263 57 49 510m 6 91 42 26 21 774m 6 70 239 53 32 1 221m 5 49 34 35 54 1 445m 7 99 238 24 06 2 053m 9 25 239 19 42 2 066m 8 73 239 04 33 2081m 4 49 31 29 51 2 229m 4 98 249 55 15 2 606m 3 96 32 05 03 2 983m 5 74 262 14 26 3101m 5 20 270 51 31 3692m 440 32 06 08 3 738m Mean GE Height Shift 6 66 1 86 50km v Maximum Number of BMs to Locate Nearest 20 v D Square 2523BC 2523BC 2523BC 2523BC 2523BC 2523BC 2523BC 2523BC 2523BC 2523BC 2523BC 2523BC 2523BC 2523BC 2523BC 2523BC 2523BC Information Found Found Nie Genivelleerd Nie Genivelleerd Found Found Found Found Found Found Found Found Found Found Found Found Found View Bench Mark Information Cus Google Earth Options o Import Google Earth DTM Heights x View List on Google Earth SSSISISSISSSISSSISSISISISIS Print List Store and Exit P f i z The
24. 30 57 02 3498 E 5007 462 2694163 380 WG 31 501 921 229 50 35 3032 179 16 STA1 24 21 03 0662 S 30 57 02 7153 E 4997 165 2694150 142 WG31 502 347 229 46 40 3048 588 24 21 04 9405 S 30 57 04 4272 E 4948 890 2694207 795 WG 31 504 155 231 11 27 3049 146 WG 31 X Sort Options Search Options Y Sort the List by Distance e Set the Search Y X Centre Position An Points Search Centre eset 2696118 78 Sort the List by Direction C Sort the List by Name O Set the Maximum Search Radius Kms 20km Sort the List by Source File C Maximum Number of Stations to Locate Nearest 25 v ELK The Locate and Add My Nearest Stations programme display Page 53 SURPAC Software User s Manual Book 3 Adding Stations to the My Stations Lo or My Stations WG files Load the Co ordinate File that contains the required Stations that are to be added to the My Stations file making it the current Co ordinate File SURPAC will note the System of the current Co ordinate File and will open the appropriate My Stations file i e Lo or WG Mark highlight a Station or Stations that are to be added to the My Stations file To Highlight a block of Stations Use the Click and drag method or the Shift Click method To Highlight Separate Stations Use the Ctrl Click method Once all required Stations have been highlighted the cursor s
25. 4 Page 26 Page 26 Page 28 Page 29 Page 29 Page 29 Page 29 Page 29 Page 32 SURPAC Software User s Manual Book 3 SURPAC Google Earth Functions Contents Continued Create KML Placemarks Polygons with linked Images Files Creating KML Image Placemarks in SURPAC Entering Image File Link file and Headings for an Image Placemark or Image Polygon ssoseesseseesesses Sending Placemark or Polygon KML files to a third party Displaying an Image Placemark KML on Google Earth Creating KML Image Polygons in SURPAC Displaying an Image Polygon KML on Google Earth Creating Hatched Polygons for Exporting to Google Earth Locating and Adding the Nearest Bench Marks RSA only Bench Marks in RSA and their use in SURPAC Software The Locate and Add Nearest Bench Marks programme Creating Arcs and Circles on a Google Earth display Locating and Adding My Nearest Stations The My Stations files L osse The Locate and Add My Nearest Stations display Adding Stations to the My Stations files Using the Locate and Add My Nearest Stations programme The SURPAC Google Earth ICON set sss Display of Stations on Google Earth Page 37 Page 38 Page 3
26. 85969 01 3085977 15 3085995 37 3086012 60 3086088 19 3086076 05 3086061 86 3086047 41 3085906 82 3085900 68 3085897 97 1214 39 1214 63 1214 38 1215 68 1213 28 1212 30 1212 64 1212 26 1212 33 1212 63 1213 09 1213 36 1213 53 1213 26 1212 96 1212 31 1212 07 1212 12 1212 32 1212 34 1221 06 1221 16 1221 53 1218 22 1217 76 1217 29 1216 84 1216 40 1216 12 1215 98 1215 80 1215 70 1215 92 1216 24 1216 72 1218 14 1218 00 1217 53 1217 07 1215 54 1215 70 1215 83 1216 16 1225 85 1223 96 1224 00 N Scanning Google Earth DTM Completed Mean Height Difference 1 70 Largest ve Difference 4 75 Standard Deviation of the Mean 3 08 Largest ve Difference 4 22 cancel X Print List ext A form will be displayed in which the selected Points their co ordinates description surveyed heights and interpolated Google Earth heights will be shown These height comparisons are imported at a rate of approximately 350 500 Point heights per minute depending on your internet connection Statistical data relating to the comparison of heights are shown at the bottom of the form There is also an option whereby you can compare Google Earth heights for a single User selected Point i e In the Co ordinate File display right click on the Point whose height you want to compare On the pop up menu that will now be displayed select the menu item Compare Height with Google Earth
27. 9 Page 42 Page 42 Page 43 Page 43 Page 45 Page 46 Page 46 Page 48 Page 51 Page 52 Page 52 Page 53 Page 54 Page 54 SURPAC Software User s Manual Book 3 No part of this manual may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording scanning or otherwise without the prior written permission of the Copyright holder Copyright K W Young 2014 SURPAC Surveying Software 1005 Hartebeeshoek Hoad P O Box 275 Broederstroom North West Province South Africa 0240 427 0 72 999 2700 427 0 86 627 0356 info gsurpac co za WWW Surpac co za SURPAC Google Earth Linear and Graphic Functions Google Earth allows for the viewing of 2D or 3D colour satellite imagery for any point on the Earth as well as being able to view galaxies and the ocean floors The surface terrain imagery can usually be viewed at a scale in the region of 1 2500 without any loss of detail quality This figure can vary from region to region but it is generally true for built up areas Google Earth therefore makes a very useful visual display tool for SURPAC Users when it is interfaced or linked with survey co ordinate and or image data This interfacing can be in the form of e Displaying the locations of Trig Beacons and or Town Survey Marks for a selected area on Google Earth e Displaying Beacons and Stations from a previous
28. A form will then be displayed showing the Point selected its co ordinates and height the Google Earth height and the difference Page 25 SURPAC Software User s Manual Book 3 Moving the cursor away from this form will cause it to be removed Comparison of Surveyed Height with Google Earth Iterpolated Height V O Lal Point Number Y Co ordinate X Co ordinate Spot Heig ht GE Height Difference 923 74655 52 3085995 48 1254 24 1254 77 0 52 2 Tacheometric File Editing Programme The main and most important function regarding the importation of Google Earth DTM data is the generation of Tacheometric files using data solely imported via Google Earth interpolation as explained below 2 1 Import Points with interpolated Google Earth DTM Heights This routine allows you to import Point co ordinates along with their interpolated heights from the Google Earth DTM Points are imported over a User defined quadrilateral figure covering the required area plus a User defined Grid interval Using this Option In the Actions Menu click on the Import GE Data menu item The form below will be displayed allowing you to enter the four points used to define the required quadrilateral The named Points should exist in the current Coordinate file otherwise their co ordinates must be entered manually amp Appending Tacheometric Data from Goolge Earth DTM Surface Intepolation Set Points to Define Interpolation Limi
29. If required the located Points may be added to the current Co ordinate File and or displayed on Google Earth Currently this programme is limited to the geographical area of 1 The Republic of South Africa and to surveys defined as using either the Lo Clarke 1880 Modified Ellipsoid System or the WG WGS 84 Ellipsoid System also referred to as the Cape Datum and the Hartebeesthoek94 Datum respectively 2 The Republic of Zimbabwe and to surveys defined as using either the Lo Clarke 1880 Modified Ellipsoid System or the WG WGS 84 Ellipsoid System using the Universal Transverse Mercator UTM Zone 35 System 3 The Republic of Zambia and to surveys defined as using either the Lo Clarke 1880 Modified Ellipsoid System or the WG WGS 84 Ellipsoid System using the Universal Transverse Mercator UTM Zone 35 System lt is not necessary for the User to define any source file for the location of the Trig Beacons or TSMs SURPAC has built in Source Files which must exist in the folder in which SURPAC Software is installed usually the folder C Surpac Software These are the same files used by the SURPAC Lo to from WG transformation programme Each of the above Source Files contains the double precision geographical positions about 48 000 Points throughout the Republic of South Africa in the Lo Clarke 1880 Modified Ellipsoid and WG WGS 84 Ellipsoid respec
30. Image Placemarks and Image Polygons is j Image Placemarks or Polygons Page 42 SURPAC Software User s Manual Book 3 Creating KML Image Polygons in SURPAC Image polygons are created using the General CAD programme found under the General Menu heading When in the General CAD programme move the mouse cursor inside the figure stand polygon for which you want to create an Image Polygon on Google Earth Then right Click the mouse The cursor will move up into the Menu area Now Click the Figure menu heading and then from the drop down menu select the option Create a Google Earth Image Polygon NB The keyboard equivalent command is FG With the cursor inside the required figure stand polygon type in FG You wil now be prompted to enter the Number or Name for the figure stand polygon The programme will then for search and locate the Lines that form the figure stand polygon These Lines will be displayed in purple If the incorrect Lines are selected then cancel the routine The form for selecting Image Files Headings Link Files etc will be displayed If the incorrect Lines figure stand polygon have been selected then cancel the routine and retry Refer to the above explanations on how to select information for the Image Polygon KML and how to create a Combined Image Polygon KML Displaying an Image Polygon KML on Google Earth Once an Image Polygon has been created SURPAC will transfer the KML file Google Earth
31. LI SURPAC Surveying Software Copyright Keith W Young 1982 2014 SURPAC Software User s Manual Book 3 SURPAC Surveying Software User s Manual Book 3 SURPAC Google Earth Functions Contents SURPAC Google Earth Linear and Graphic Functions Page 1 Requirements for SURPAC Google Earth interfacing Page 2 Setting Google Earth for SURPAC Data and Overlays Page 2 Locate and Add Nearest Trig TSM Beacons Programme Page 4 Running the Programme c eeesessseeese esee nnne nnns Page 6 Displaying the Trig TSM Beacons on Google Earth Page 8 Displaying Points from a Co ordinate File on Google Earth Page 9 Interfacing SURPAC CAD programmes with Google Earth Page 11 Viewing SURPAC CAD Lines and Points on Google Earth Page 11 Viewing a SURPAC CAD Sheet on Google Earth Page 12 File types used for Interfacing SURPAC with Google Earth Page 15 Compressed zipped KMZ files for third party use Page 17 Hints when using SURPAC CAD amp Google Earth interfacing Page 17 Import a Google Earth Placemark into a Co ordinate File Page 18 Creating a Placemark in Google Earth Page 18 Importing a Placemark into a SURPAC Co ordinate File Page 18 Transfer a Path Line Polygon to a General CAD Sheet Page 19 Creating a Path or Polygon
32. Locate and Add Nearest Bench Marks programme display Page 49 X Bench Mark xvbx RSA WG System Hartebeesthoek84 Datum Degree Square 2523BC System WG 237 Y 70 890m X 2818 167m BMixvby BM Height 1 041 384m GE Height 1 051 325m GE Height Shift 9 93m Lat 25 28 07 55 EM Lon 2242 147 7E BM EN Info Nie Genivelleerd SURPAC Surveying Software Display of Bench Marks on Google Earth showing information for a selected Bench Mark The Google Earth icon used by SURPAC Software for Bench Marks is m Bench Marks SURPAC Software User s Manual Book 3 Creating Arcs and Circles on a Google Earth display Drawing Arcs Circles and Dashed Dotted Lines on Google Earth The KML language used to generate KML files on Google Earth only provides for limited line drawing options Available options are line width and line colour and apply to straight lines only However SURPAC provides routines for line styling dotted lines dashed lines etc by means of adding extended functions to handle such lines Functions also exist in the SURPAC General CAD programme to enable the plotting of Arcs and Circles on Google Earth via a KML file Arcs may be solid dotted or dashed S T d ENE Py epp of a SURPAC KML file displayed on Google Earth laine Arcs and Circles Page 51 SURPAC Software User s Manual Book 3 Locating and Adding My Nearest Stations Programme B The My Stations fi
33. Path or Polygon an appropriate Name You can change the style and or colour for the Path Lines or Polygon from the default white to better visualize the shape you are about to draw You can also enter an appropriate Name for the Path or Polygon to be created Click in the viewer to start the drawing creation and use the following method to achieve the desired shape Regular shape Click and release method Move the Mouse to a new point and click to add additional points In this mode the cursor remains a square drawing tool whilst the Path or Polygon being drawn is displayed up to the last clicked position Polygons will automatically be closed back onto the defined starting position Whilst drawing the last clicked position can be deleted by clicking the Mouse RHB Once construction of the Path or Polygon is complete click the OK button on the dialogue box The Path or Polygon created will be added to My Places Warning if you have a Temporary Place currently open at the time of the construction then the Path or Polygon will be added to that Temporary Place The created Path or Polygon information now needs to be saved as a KML file in order for SURPAC to be able to import it To do this locate the Path or Polygon under either My Places or Temporary Places and right click on it A pop up menu will appear and on this menu click the Save Places as menu item On the displayed Save file form ensure that the Save as Type item
34. URPAC Surveying Software User s Manual Book 3 Covering the SURPAC Google Earth Functions By K W Young YCo ordmate XCo onfinsie Heights Descriptions Latitude 5 Longitude E 707235690 2905327171 1035 201519 5554 mOTOXA4TM 0 000 9 006 misse SpA wana os sea STAGE 2905432575 qp 26152X0082 2 amp 1737 3147 L uas snes at a es ecise perire To BIT Rc cmm mw ee E eee 70495901 2905645105 261739 0008 Fasossa o EEM 70307679 2905410 569 2637 44 2555 L E setis Hn E zetas ber neris speras en O ario orrn sas meras os 261533120138 2 amp 172943M rr ies ju eaa etre 26152290378 261738 des eur o 2805283 014 ESEE Po ESTIA TA 0 Hale tal 2905525 548 7311753 AIRE AU Ava 1058 2815514715 Er 04 ERE ESSE mo 7425350 semana EISD a oe oe 3 3 THazi 85085279 2907396220 1500 700 362054778 tem c uo o 8358 70 2913b85 20 4404 700 3 2620 012053 7 amp 1855 0050 ird yntui up diste inmune gd prenom i l n m 9n m uiu m ow JI on eaten Mt Wu wo umm m o n rn EIJUUITITEIU RSE Sew 134000 Ha BEY Cee Meuse NI for hah Deses Manna Dopisy aids TE DILOKONG CHROME MINE Oe an ic MLA CR AOE RN TD en MOS CAII Hbi mA DKOCHKC OON gw gros
35. all the necessary KML files including the combined KML file as well as the image and link files used in each of the KML files Page 37 SURPAC Software User s Manual Book 3 Creating KML Image Placemarks in SURPAC When in the Co ordinate File Editing programme right click on the display line for the Point for which an Image Placemark is to be created This will cause the normal pop up menu to be displayed which now includes the new menu item Create a Google Earth Image Placemark o Create KML Polygon with Images Polygon C Surpac_GE 8140bgpwg84 7188 aN NB All Images and Link files for the KML file will be created in the C Surpac_GE 8140bgpwg6864 folder When sending a KML Polygon file to a third party all Images and Link files in the KML file plus the KML file itself must be sent Click to change Current Image Current Image Image 1 Image files DSCN1454 JPG gt c OS Image 1 Width in Pixels Exc 75 0 150 C 300 450 C 600 C c3 Surpac Software Image 1 Heading i 2000 Old House Picture 1 2010 5 BAILLIE PARK U36 Diagram l Polygon General Headings 7 c3 Any old Heading Line 1 2010 bp16 3 JPG j124 08 09 190826 jpg 12527da Swing PIotBMP 2 jpg 18140bgpwg84 GP2 GPplanBMP 1 ji 18140bgpwg84 PIotBMP 1 jpg Polygon Link Files A0 Diagram DiagBMP 1 JPG C545 Sketsplan01 pdf A0 Diagram DiagBMP 2 JPG B49a 5 bmp Broeder 4 bmp o y Broederbi
36. ar which is usually 1 4m above ground level Applications Generating Contour and DTM files via downloaded Google Earth data provides rapid and useful data that have various small scale applications When displayed in conjunction with an imported Google Earth image these become even more useful The generated Contour and DTM files can also be exported as KML files for client viewing directly on Google Earth itself Examples of useful applications are for Township planning approval Sub divisional planning approval Preliminary water gas fuel pipe alignment over long distances Preliminary road rail alignment over long distances Cross section data for preliminary mass haul calculations Preliminary dam site investigations water volume versus wall height etc 1 Co ordinate File Editing Programme 1 1 Import Points from a KML file This existing function has been extended so as to allow the import of multiple Points contained in a KML file and not just a single Point as was the case previously 1 2 Importing interpolated Google Earth DTM Heights This function allows you to import interpolated heights from Google Earth for any Page 23 SURPAC Software User s Manual Book 3 or all Points existing in the current Co ordinate file You may define the entire file or mark highlight selected points in the file Heights will only be imported for points whose current heights do not exist Existing heights will not be overwri
37. cavation Contours and DTM lie below the natural surface T Displaying 3D Contour amp Triangle DTM data to Google Earth as Options for 3D Google Earth Display Surface Options Display both Contours and Triangle DTM on Google Earth s Display only the Contours on Google Earth a E Data Display Colours Display Colour for Contour Lines R Display Colour for Solid Triangle DTM Yellow Surface Options Clamp the Display Data to the 3D Google Earth Surface _ Show Display Data in 3D over the Google Earth Surface 10 Set required Height above Google Earth Surface 5m Cance X Options for displaying Contours and or DTMs on Google Earth e Page 30 SURPAC Software User s Manual Book 3 Google earth imagery Date 8 22 2010 3 2002 25 48 34 687S 27 50 11 64 E elev 1266 m Eye alt 195km 0 SURPAC 3D Triangulation Model and Contours displayed in situ on Google Earth x Google E SURPAC 3DTriangulation Model and Contours of a slimes dam survey Page 31 SURPAC Software User s Manual Book 3 In the first example on the previous page the Show Display in 3D over the Google Earth Surface was used This mode is necessary for physical manmade features such as dumps or stockpiles that overlay the pre existing natural surface Summary on displaying 3D Models on Google Earth In Google Earth it is possible
38. d the display mode namely The Search Centre position may be User selected The located Points may be either Trig Beacons TSMs or both The number of locate Points displayed may be set according to a required maximum number or a required maximum search radius The display of located Points may be in order of Distance Direction or Point Name Any of the located Points in the displayed list may be tagged as not required to prevent them from being added to the Co ordinate File Any located Point in the displayed list may have its Degree Square Latitude and Longitude shown on a sub display for identification purposes An output of the displayed list of located Points may be made to the Printer an ASCII file or the Clipboard The located Points in the displayed list marked as required i e the ticked Points may be added to the current Co ordinate File and SURPAC Software User s Manual Book 3 e he located Points in the displayed list marked as required i e the ticked Points may be displayed on Google Earth Running the Programme The programme may be loaded in any of three different ways namely 1 Using the Locate and Add the Nearest Trig TSM Beacons Menu Item under the Conversions Menu or 2 In the Co ordinate Editing Programme click the Mouse RHB and from the displayed Menu select the Locate and Add Nearest Trig TSM Beacons Item or 3 In the Co ordinate Editing Programme click th
39. e Options Button select the Locate and Add Nearest Trig TSM Beacons option and then From the Conversions Menu select the Locate and Add Nearest click the OK Button e SURPAC Locate Nearest Trig Beacons and or T5M s Selection Options 86911 47 95322 40 94115 87 95671 88 2561 98 1260 97 95661 38 84606 54 92583 78 92572 34 10495 96 0350 87 81048 17 96696 17 79407 49 79225 65 3226550 34 3227107 07 3220596 96 32252T1 82 3217458 84 3217161 56 3219365 42 3214761 01 3214530 29 3228887 517 3229006 69 3229863 06 3219916 86 32254650 74 32270135 55 3222475 64 3221700 98 Select Both Trig Beacons and TSMs Select only Trig Beacons Select only T amp Ms C Set the Search Y X Centre Position All Points Set the Maximum Search Radius Kms 15km Maximum Humber of Beacons to Locate Nea rest 70 Display Point Degree Square Information S 3 nus Trig Name Swart Kloof Brabant Daniels Highlands Retreat Spitzkop Antwerp Knocknacree Lokshoek Lok Woodlands 1411 60 121 02 38 1562 10 23 30 36 Brandkop res Newlands Universitas University 53 45 51 9724 87 1424 10 3853 97 Sort Options Sort the List by Distance Sort the List by Direction C Sort the List by Name BE WG 27 X Centre 89075 87 3221428 99 Select All De Select All View List on Google Earth Print List Store and Exit SURPAC Software User
40. e Earth is viewed using Elevations images become distorted due to terrain height variations Use the Navigation Control displayed at the top right corner of the Google Earth display to set the orientation to True North click the N symbol at the top of the Navigation Control This is also important If Google Earth is not viewed in True North orientation the image will be distorted when sent to SURPAC Tips In order to be able to select the full image displayed click on the Google Earth View menu and ensure that the Status Bar is not displayed To maximise the image area click on the Google Earth View menu and ensure that the Sidebar is not displayed Page 20 SURPAC Software User s Manual Book 3 With the Google Earth image oriented to True North and the Elevation Exaggeration to 0 01 create a Path as described above consisting of a single line by carefully clicking on the top left and then the bottom right corners of the Google Earth display area Save this Path as a KML file as described above normally into the C Surpac GE folder NB After creating and saving this Path it is important that the Google Earth display is not changed in any way until the current image has been saved Click on Google Earth s File menu heading then select the Save menu item and then the Save Image sub menu item In the Save As dialogue box enter an appropriate file Name The file type is automatically set to the Jpeg format
41. e appropriate toolbar icon or select the Placemark menu item found under the Add menu heading The new Placemark Dialog Box appears and the cursor changes to a flashing square drawing tool Enter the properties for the Placemark and give it an appropriate Name Since SURPAC will use the Placemark Name as the name for the imported Point use a SURPAC friendly name i e up to 8 characters in length Move the cursor onto the flashing drawing tool and then drag the tool to the required screen position by holding down the Mouse LHB as the cursor is moved Once the drawing tool is correctly positioned click the OK button on the dialog box The newly created Placemark will be added to My Places Warning if you have a Temporary Place currently open at the time of the construction then the Placemark may be added to that Temporary Place The created Placemark now needs to be saved as a KML file in order for SURPAC to be able to import it To do this locate the Placemark under either My Places or Temporary Places and right click on it A pop up menu will appear and on this menu click the Save Place as menu item On the displayed Save file form ensure that the Save as Type item is set to KML kml The KML file may be saved to any folder but SURPAC KML files are generally kept in the C Surpac GE folder Finally click on the Save button Importing the Placemark into a SURPAC Co ordinate File as a Point Before attempting to
42. e to a red cross This point will remain dormant and will not be displayed until clicked again Click on the View List on Google Earth button at the bottom right of the form SURPAC will open and run Google Earth and the selected beacons will be displayed at their surface positions on the satellite imagery Either a Trig Beacon or a TSM symbol icon will be used to mark the displayed beacons To obtain a beacon s information click on the beacon required A balloon text display will then appear showing The Beacon TSM Name The Degree Square Trig Beacons only The Co ordinate System e g WG29 The Beacon Y X and Z values or E N and H values The Beacon Latitude and Longitude The Google Earth icons used by SURPAC for Trigs and TSMs are Trigonometrical Beacons Town Survey Marks SURPAC Software User s Manual Book 3 Fa 235 Belle ombre RSA WG System Hartebeesthoek94 Datum System WG 19 54739 960 X 3763821 080 Z 726 200 Lat 34 00 00 0441S Lon 18 24 26 9371E TRIG STANDARD PILLAR SURPAC Surveying Software 19158 fa i t M ot Example of a 3D View of Trig Beacons displayed on Google Earth Displaying Points from a Co ordinate File on Google Earth 1 In SURPAC run the Co ordinate File Editing programme from the General main menu heading 2 Mark i e highlight the Points required for viewing on Google Earth 2 1 You can mark a block of Points by either
43. eate Sections from a Contour Triangulation File plus defined Bend Points Load Section information from a Handi Data LEVELS Lng Sect Disk File E Load Long Section Information from an ASCII Disk File Te Merge Long Sectional Information from a SURPAC Long Section File A a Generate Sections from defined Bend Points and Google Earth Heights Create a Series of Grouped Random Section Files from a Tachy File C Using this method SURPAC will Import Long section Height data from the Google Earth DTM interpolated along a User defined Centre Line or series of consecutive Centre Lines and at a User defind interval The Centre Line position s are defined by entering the Names of the consecutive Bend Points These Bend Points must exist in the currently defined Co ordinate File This method is best suited for the rapid development of preliminary Long sections over large areas where a Height accuracy of 3 Metres is sufficeint Page 34 SURPAC Software User s Manual Book 3 A form will then be displayed that allows you to enter the Bend Points that define the Required Long Section These Points must exist in the current Co ordinate File NB An easy way to import a series of Bend Points is to define a Path in Google Earth that follows the required route This Path can then be imported into the SURPAC General CAD programme After this use the option that Converts Line terminals into Points The Y X values of these Points will
44. ed by the amount of the Meridian Convergence On the SURPAC General CAD Sheet move the cursor to the top left terminal of the imported Path or Line and then click Page 21 SURPAC Software User s Manual Book 3 the Mouse LHB Now move the cursor to the bottom right terminal of the imported Path and then click the Mouse RHB SURPAC will now apply a swing to the Image to correct for the Meridian Convergence as described above The Sheet will again re orientate back to O and display the adjusted imported Image NB The Image may not fit exactly onto the Path terminals due to the former having been swung to compensate for the Meridian Convergence Adjusting the Imported Sheet Image Setting the Image to the Background If the Image lies on top of existing Line and Text items then set the Image as the background i e the Lines Text Points etc will be displayed on top of the Image To do this right Click on the Image click the Image menu heading and then select the menu item Send Images to the Back Shifting the Image The imported Image may need to be shifted in the Y and or X directions to get a good fit with any existing Sheet data If this is required right Click on the Image click the Image menu heading and then select the Shift a Sheet Image menu option On the displayed form enter the Y and or X movement required for the Image This option can be repeated to ensure a good fit Adjusting the Image Brightness and or
45. ek94 Datum System WG 31 Y 79652 460 X 2713047 160 Z 1622 800 Lat 24 31 09 9046S Lon 30 12 50 4643E Standard Pillar A 3D semi transparent CAD Sheet Overlay plus Trigs on Google Earth File types used for Interfacing SURPAC with Google Earth Interfacing with Google Earth is done via KML files Keyhole Markup Language KML files employ HTML XML type grammar and may be used for modelling and storing geographic features such as points lines images polygons and models for display in Google Earth Google Maps ESRI ArcGIS Explorer AutoCAD etc Once you have defined which elements points lines map sheets etc you want displayed on Google Earth SURPAC will transform the Y X or E N positional information into Latitudes and Longitudes SURPAC will also convert dotted or dashed lines into small line segments for sending to Google Earth as the KML format can normally only handle solid lines lf a SURPAC CAD sheet is to be sent to Google Earth SURPAC will first set the sheet transparency or set the background to fully transparent as User set and then create a PNG image of the sheet PNG Portable Network Graphics files are lossless highly compressed image files normally having the extension of png Page 15 SURPAC Software User s Manual Book 3 All SURPAC generated KML and PNG files are stored in the folder C ASurpac GE The names of the generated KML files and of the associated PNG files where
46. ere is nothing wrong with this technique Surveyors should be aware that in some areas of the country there are height deviations between the Trig heights and the Bench Mark heights of up to several metres For Surveyors who want to connect their surveys to the national Bench Mark system SURPAC now provides a programme that locates and displays the nearest Bench Marks to the survey area and allows the loading of User selected Bench Marks into the current Co ordinate file Currently this programme is limited to the geographical area of the Republic of South Africa and to surveys whose co ordinate system is defined as being in the WG WGS 84 Ellipsoid System in South Africa the Hartebeesthoek94 Datum It is not necessary for the User to define any source file for the location of the Bench Marks as SURPAC has a built in Source file called BenchMarksRSA sbm This file must exist in the folder in which SURPAC Software is installed usually the folder C Surpac Software The above Source file contains the double precision geographical positions Latitude and Longitude of about 18 000 Bench Marks throughout the Republic of South Africa approximately co ordinated in the Hartebeesthoek94 Datum system This programme will automatically search and extract the required Bench Mark information from the above Source file Since the Source file Bench Marks are stored in Lat Long format any Degree Square boundaries become irrele
47. g ConBMP 1 bmp Broederbig ConBMP 2 bmp Broederbig ConBMP 3 bmp C501 Malelane X20 4 DiagBMP 1 jp All Graphic jpg bmp gif Clear the Current Image Save above data to a kim Info File Load data from another kim Info File Clear All Shown Information Create a Combined KML file for all KML files in this folder Set up form for a Google Earth Image Placemark or Image Polygon The above form will be displayed with its heading showing the folder Path that will be used to store the Image Placemark Polygon information and the Point or Polygon Name NB SURPAC will create a sub folder under the main SURPAC Google Earth folder called C Surpac GE This sub folder is created from the name of the current Co ordinate file All blanks in the file name will be replaced by underscores In the above example the folder used to store the information is C Surpac_GE 8140bgpwg84 and the Polygon name is 7188 Page 38 SURPAC Software User s Manual Book 3 Entering Image File Link file and Headings for an Image Placemark or Image Polygon Image Files The top left hand drop down box under the heading Click to Change Current Image selects the current Image holder You are able to select up to 8 Images for an Image Placemark or Image Polygon The File selection box on the right hand side of the form will display all acceptable Images in the current folder path The folder path can be
48. heights with interpolated Google Earth Heights This function allows you to compare existing Co ordinate file heights with interpolated heights from the Google Earth DTM You can define the entire file or mark selected points in the file This function is useful when needing to evaluate the accuracy of imported Google Earth Heights against surveyed values Using this Option If you want to restrict the comparison of Google Earth heights to selected Points then first highlight these Points in the Co ordinate file listing as explained above Then in the Actions Menu click on the File Options menu item to display the File Options form Click on Compare File and Google Earth Heights and then click on the OK Page 24 SURPAC Software User s Manual Book 3 button If you have highlighted a set of Points you will be prompted if you want to restrict the height importation to these Points Reply as appropriate A Comparison of Co ordinate File Heights against Google Earth Values Y A Desc File Height GE Height dj emm co on Re ed po m 75982 46 75980 49 75978 44 J59TT T3 75977 05 75976 28 75975 66 75975 10 75990 66 75992 87 75995 13 75997 15 76045 88 76064 84 76060 97 76053 00 76005 95 76020 68 76033 27 76044 73 75544 52 75545 36 75545 80 3085968 47 3085987 46 3086008 31 3086028 67 3086048 56 3086067 50 3086078 48 3086092 50 3086082 66 3086064 00 3086044 92 3086025 79 30
49. hould be over either the last Station selected or over the green tick box near the top right of the display In either case Click the mouse Right hand button to display the Co ordinate display s pop up menu On this menu select the Add Station s to My Stations WG file or Add Station s to My Stations Lo file as the case may be If a Station of the same Name and originating from the same Co ordinate File already exists in the My Stations file the programme will prompt you to either accept the existing Station values or to overwrite the values NB Stations having duplicate Names can be stored in the My Stations files as long as they originate from different Source files The term Station is used throughout this discussion however any Point such as a Reference Mark Outside Figure Point etc may be stored in either of the My Station files Using the Locate and Add My Nearest Stations programme NB This programme forms a part of the Conversions Module and this Module must be an active part of the SURPAC License in order to be able to access the programme The programme is loaded from the Conversions Menu when selecting the Locate and Add My Nearest Stations Menu ltem Page 54 SURPAC Software User s Manual Book 3 If the current Co ordinate File is empty the programme will display a warning message and abort as the Co ordinate File must contain at least one Point in order for this programme to work
50. in Google Earth Page 19 Importing a Path or Polygon into the General CAD Page 20 SURPAC Software User s Manual Book 3 SURPAC Google Earth Functions Contents Continued Transfer a Google Earth Image to a General CAD Sheet Creating an Image Bounding diagonal Line Path and defining an Image in Google Earth Importing a Google Earth Image to a General CAD Sheet Adjusting the Imported Sheet Image Setting the Image to the Background Shifting the Image Adjusting the Image Brightness and or Contrast SURPAC Google Earth Elevation Functions UIN ZRRE EET PDDICAUOIS ET Co ordinate File Editing Programme Import Points from a KML file Importing interpolated Google Earth DTM Heights Compare Existing Heights with Google Earth Heights Tacheometric File Editing Programme Import Points with interpolated Google Earth Heights Compare Existing Heights with Google Earth Heights Contour Generating CAD Programme Compare Existing Heights with Google Earth Heights Comparing a Single Point usussue Comparing the entire File View 3D Contours amp DTM on Google Earth Summary on displaying 3D Models in Google Earth Longitudinal Sectioning Programme Page 20 Page 20 Page 21 Page 22 Page 23 Page 23 Page 2
51. is set to KML kml The KML file may be saved to any folder but Page 19 SURPAC Software User s Manual Book 3 SURPAC KML files are generally kept in the C Surpac_GE folder Finally click on the Save button Importing the Path or Polygon into a SURPAC General CAD Sheet In the SURPAC General CAD programme first set the required Layer Pen Style and Thickness to be used for the imported Lines Click on the File menu heading and then select the Import Lines from Google Earth KML File menu item From the displayed File Selection form select the required KML file The Lines contained in the selected KML file will be imported and displayed on the current Sheet using the defined Layer Style and Thickness NB The same importation method can be used to import Line information from a SURPAC and compatible generated KML file containing Lines from sources such as other General CAD Sheets General Plans Working Plans and Sectional Title Plans Transferring a Google Earth Image to the SURPAC General CAD Creating an Image Bounding diagonal Line Path and defining an Image in Google Earth In Google Earth ensure that the Toolbar and Sidebar found in the Layers Panel are displayed Move the Google Earth display to show the required area at the required scale Click the Google Earth Tools menu heading and select Options oelect the 3D View tag and then set the Elevation Exaggeration to 0 01 This is important If Googl
52. les SURP AC allows you to create and store two My Stations files one for the Clarke 1880 Modified ellipsoid e g the RSA Lo datum Arc 1950 Arc1960 UTM etc and the WGS 1984 ellipsoid e g RSA Hartebeeshoek94 datum UK National GPS Network New Zealand Geodetic Datum NZGD2000 UTM etc These files are called My Stations Lo and My Stations WG respectively and are stored in the same folder as the SURPAC application usually the C Surpac Software folder The purpose of these files is to allow Surveyors to store their own Stations or any other required points in the above files and to have the ability to locate and import the nearest of these Stations into any Co ordinate file Each Station stored in either of the two My Stations files consists of the following data Name Latitude Longitude Y Co ordinate or Easting X Co ordinate or Northing System e g WG 273 Lo 19 Zone 35 etc Height Aux Height Field 1 as set in the Source file Field Z2 as set in the Source file Description Source File Path Name When displaying the nearest Stations the following are also shown e Direction e Distance Which are determined from the currently chosen Search Centre position Since the two My Stations files are stored in Lat Long format any Degree Square boundaries become irrelevant to the programme Surveys can be located close to any Degree Square boundary and the progra
53. mage Polygon in the General CAD programme used for creating a KML file and exporting this to Google Earth This same routine may be used for creating standard Hatched Polygons without any image or document attachments as follows In the SURPAC General CAD programme Click the Hatch Flood menu heading and then select the menu items to set the required Hatch Colour and Hatch Type and then Hatch the selected Polygon From the File menu heading select the item Create a KML Google Earth Image Polygon Enter the required Name for the Polygon and when the Image and Link file option form is displayed just Click on the Proceed button without entering any link information T Earth display of a Hatched filled Polygon from the SURPAC General CAD programme Page 45 Locating and Adding the Nearest Bench Marks RSA only E Bench Marks in South Africa and their use in SURPAC Software The office of National Geo spatial Information within the Department of Rural Development and Land Reform has issued a list of Bench Marks covering the Republic of South Africa The Bench Mark heights Orthometric heights were determined using precise levelling and they represent the most accurate height reference system for relating surveys to the South African reference geoid It is long been common practise for Surveyors to determine a height reference for a survey by means of Trigonometrical levelling from national Trig beacons Whilst in general th
54. mme will still Page 52 SURPAC Software User s Manual Book 3 generate its own temporary Degree Square of Points centered about the Survey or any defined Point in the Survey Data may be drawn from different Degree Squares for any given Survey The programme offers User options for both the selection of Stations and the display mode used namely The Search Centre position may be User selected e he number of located Stations displayed may be set according to a required maximum number or a required maximum search radius e The display of located Stations may be in order of Distance Direction Point Name or Source File e Any of the located Stations in the displayed list may be tagged as not required to prevent them from being added to the Co ordinate file or displayed on Google Earth e An Output of the displayed list of located and selected Stations may be made to the Printer an ASCII file an Excel file or the Clipboard e The located Stations in the displayed list marked as required i e the selected Stations may be added to the current Co ordinate File The list of Stations may also be displayed on Google Earth SURPAC Locate the Nearest Stations in CASURPAC SOFTWARE MyStations WG sur 9 i Bie Current Co ordinate file System WG 31 Hartebeesthoek94 Datum WGS 84 No
55. nding the information to a third party These files will have the name Combined Image PlaceMarks or Combined Image Polygons Sending Placemark or Polygon KML files to a third party When sending a KML file to a third party you must include all the Image Files and Link Files with the KML file If you have created a Combined KML file then safest way to do this is to include all files in the sub folder If you are sending Placemarks you must include the small file called Camerad gif in order to get the correct symbol shown on Google Earth Displaying an Image Placemark KML on Google Earth Once a Placemark has been created SURPAC will transfer the KML file Google Earth assuming that Google Earth has been installed You should see the Placemark represented by a camera location to differentiate it from a standard Placemark that has no Image attachments To display the Placemark s Name co ordinates headings Link Files and Image Files Click on the icon To display the contents of a hyperlink Link Files right Click on the hyperlink Google Earth will then switch to its display page and display the contents of the file If the file does not display and the loading bar stays on the form then just click the refresh button at the top of the Screen To display the Images in full size right Click on the Image Google Earth will then switch to its display page and display the Image The Google Earth icon used by SURPAC Software for
56. nual Book 3 memory handling then the Windows XP OS the scale is set to half the defined plotting scale to provide an even clearer overlay image 1 In the CAD programme click on the File main menu heading and then select the View Sheet on Google Earth menu item 2 Once the CAD sheet has been transferred Google Earth will shift its location to the centre of the imagery covered by the Sheet and will display the Sheet viewed from an appropriate height Notes The Sheet Orientation is always set to True North regardless of the Sheet Swing used and there is no Tilt applied All view settings can be User modified from within Google Earth The Sheet overlay will be locked to the terrain covered by the Sheet Hence when viewed in 3D the Sheet will drape itself over the terrain If the Sheet background has been set as fully transparent then only the Sheet data such as Lines Text Hatching etc will be shown Otherwise the Slide on the Google Earth Sidebar can be used to change the Sheet overlay transparency d E tour E Lu s Mex RP rae frags FLU TOT RET S Digit amp lO Ts XA MV Lr E ET j s Example of a SURPAC Township layout Sheet with partial transparency on Google Earth Page 13 A layout with full background transparency on Google Earth SURPAC Software User s Manual Book 3 E x e ma X LE m 56 schlickmanns T C RSA WG System Hartebeestho
57. om the Working Plan programme are called FileName WP SheetX kml and FileName WP SheetX png where FileName is the name of the current Co ordinate file and X is the current WP Sheet number KML and PNG files saved for Sheet overlays from the Contour CAD programme are called FileName Contour Sheet kml and FileName Contour Sheet png where FileName is the name of the current Contour file Page 16 SURPAC Software User s Manual Book 3 Compressed zipped KMZ files for third party use Another file format that can be used for sending data and overlays to Google Earth is the KMZ format This is a zipped format of a KML file and is a handy format when sending overlay information to another person who does not have SURPAC Software To create a KMZ file from a SURPAC generated KML file use any zip application such as Winzip or WinRAR to create a zipped file that contains all the required elements for the data and or overlay The created zip file must be given the extension kmz Notes 1 For files that contain Points you must include the three small PNG image files called RedBlackTrig png RedBlackTSM png and RedBlackPoint png These images are the SURPAC mark icons for Trigs TSMs and Points respectively 2 For overlays that consist of a CAD Sheet the PNG image of the CAD Sheet must be included The PNG image file will have the same name as the KML file 3 All the above files including the KML file are located in the C S
58. oogle Earth for a spatial view of the set of Bench Marks By clicking on a Bench Marks symbol on the Google Earth display the Bench Mark s co ordinate and height information is displayed along with the Height Difference if applicable and any information related to the Bench Mark If the Google Earth DTM heights are displayed the programme form will display the Mean Google Earth Height Shift and its Standard Deviation for all selected ticked Bench Marks Name xvb56a bray 63 xvby xvbx xvb57 xvb56 xvb57a xvb55a xvb58 xvb59 xvb60 xvb55 xvb60a xvb54a xvb61 xvb61a xvb54 No Col e on Oe a sd ad md NIDN fe Ge Ro 5 co Sort Options amp b Locate Nearest Bench mark Points Y 70 427m 70 821m 70 961m 70 890m 71 233m 70 203m 71 782m 69 905m 72 474m 72 502m 72 511m 69 561m 73 173m 69 141m 73 798m 74 417m 68 739m X 2817 529m 2 818 148m 2818 118m 2818 167m 2817 639m 2818 264m 2 817 080m 2818 882m 2816617m 2 816 639m 2816 623m 2 819 593m 2816 798m 2 820 220m 2817 274m 2 817 748m 2 820 859m Y SearchCentre X 70 725m 2 817 693m Sort the List by Distance amp Sort the List by Direction Sort the List by Name Sort the List by Height Diff amp BM Height 1 033 189 1 040 962 1 041 474 1 041 394 1 034 361 1 044 994 1 033 299 1 049 508 1 040 345 1 040 442 1 040 667 1 051 133 1 041 919 1 052 04
59. ovide a spatial view of the set of Stations This is only applicable if the current Co ordinate File uses a System based on the WGS 1984 ellipsoid By clicking on the View List on Google Earth Button if active all the selected required Stations will be displayed on Google Earth Clicking on any of these displayed Stations in Google Earth will display the Station s System co ordinate and height information Latitude Longitude and point description The SURPAC Google Earth Icon set The full set of Google Earth icons used by SURPAC Software is F1 Trigonometrical Beacons K Town Survey Marks E Bench Marks Q Survey Beacons Points Sy Image Placemarks or Polygons LS My Stations Please note that the hot Spot that identifies the position of the item is the bottom centre of the icon Page 56 SURPAC Software User s Manual Book 3 E EJ Station STA 12mm Iron Peg RSA WG System Hartebeesthoek84 Datum System WG 31 49617 236 X 26594185 443 zZ 503592 Lat 24 21 04 21385 Lon 30 57 03 9895E SURPAC Surveying Software A Sues 4 Te i E 7 gt gt i gt Display of Stations on Google Earth showing information for a selected Station Page 57
60. ribe the purpose locality etc of the Image Placemark or Image Polygon These headings may be entered edited or removed in the usual way Placemark or Polygon Link Files A Link File is a file that the Image Placemark or Image Polygon can load up and display within Google Earth via a hyperlink text item NB Link Files have to be Printer Document files pdf or standard ASCII files txt Page 39 SURPAC Software User s Manual Book 3 The input boxes directly below the heading Placemark Link Files or Polygon Link Files at the bottom centre of the form allow for the selection of up to 5 Link Files NB For Image Polygons SURPAC automatically generates and adds a text file that contains the Polygon Points system co ordinates geographical co ordinates the distances and directions between Points and the Polygon Area This file will automatically be included in the KML file s list of hyperlink Link Files The file will not be shown on the above form but the hyperlink will be visible as a part of the KML file information in Google Earth On clicking on any of the available 5 input boxes for Link Files The file selection box on the right hand side of the form will display all pdf and txt files in the current folder path The folder path can be changed by selecting the required path using the Drive and Directory selection boxes above the file display The Link File type displayed can be selected using the file Type
61. selection box below the file display Double Click on a file Name in the File selection box to select this file as a Link File The files name will appear in the selected Link File input box Clear the Current Image Button This button will clear the currently displayed Image Only use this option if you want the current Image to remain blank unused If you just want to change the existing Image for another Image simply re select a new Image as described above Clear All Shown Information Button This button will clear all the currently displayed Images Link Files and Headings Use with caution A warning message will be displayed in case you Click this button in error Save above Data to a kim Info File Button This button allows for the intermediate saving of the information to a kim file A kim file is a SURPAC file that holds all data for an Image Placemark or Image Polygon The kim file saved will be in the sub folder of the CASurpac GE as explained above and will have a name associated with current Placemark or Polygon In the above example the path and file name will be CASurpac GEVLL5952 Youngsville Township Wg 27 13B KML Image Placemark kim Page 40 SURPAC Software User s Manual Book 3 Load data from another kim Info File Button When running this programme it will check to see if the current Placemark or Polygon has an existing kim file If so it will automatically
62. survey on Google Earth to help locate these points e Displaying User selected Points in a Co ordinate file on Google Earth to help locate these points e Displaying User selected Precise Level Bench Marks RSA only on Google Earth to help locate these points e Displaying Points and or Lines from a survey plan or sheet to view their positions on Google Earth e Displaying a survey Plan or Sheet as an overlay on Google Earth e Displaying SURPAC 3D Contours and DTMs on Google Earth e Displaying General CAD Polygons on Google Earth Displaying Image Placemarks and Image Polygons on Google Earth e Importing a Placemark created in Google Earth into SURPAC e Importing a Line Path or Polygon created in Google Earth into the SURPAC General CAD e Importing a Google Earth Image into the SURPAC General CAD e Adding Google Earth DTM interpolated Heights for existing Co ordinate File Points SURPAC Software User s Manual Book 3 Comparing Google Earth DTM interpolated Heights with existing Co ordinate File Point Heights Importing and Adding Google Earth DTM interpolated Heights for a User defined set of grid mesh Points in a Tacheometric File Comparing Google Earth DTM interpolated Heights with existing Tacheometric File Points Requirements for SURPAC interfacing with Google Earth 1 Google Earth must be installed on the computer If you do not already have Google Earth installed visit http earth google com
63. te form standard Placemarks are created via the Co ordinate File Editing programme and the Image Polygons again to differentiate from standard Polygons are created via the General CAD programme Both programmes are found under the SURPAC General main menu heading Image Placemarks can be useful for e Defining the Point s position on the earth s surface e Using an image or a sketch plan to clearly show the physical location of a Beacon Reference Mark Trig Beacon or Town Survey Mark e Using an image to display a surveyed point of interest such as a monument grave stone sewer or geographical feature e Using a Link file to describe an important surveyed feature or point of interest Image Polygons can be useful for e Defining the position shape and size of the Polygon on the earth s surface Showing images of site itself from various viewing positions Showing images of important geographical features on the site Showing images of existing infrastructure or development on the site Using Link files defining the Polygon site dimensions and legal documents pertaining to the site such as a Diagram or Deed of Transfer etc Although the KML files for both Image Placemarks and Image Polygons are created individually all such files in a folder can be combined into a single KML file Sending the information to a third party then requires just sending the sub folder see below created by SURPAC as this sub folder will contain
64. then be stored in the Co ordinate File Finally use the Co ordinate File s Import interpolated Google Earth Heights option to height these Bend Points e Lang Section Interpolation from Google Earth N Chainage of the First Long Section Point Listed Below 0 000 Bend Name Chainage YCo ord XcCo ord Elevation L5 0 000 54 535 036 55 080 652 22 353 EO 1 926 095 272 935 265 187 Delete Point 2640 931 55990 368 3755 953 464 282743 3 495 494 56 456 673 3 756 669 591 555 051 Edit Point 4 255 794 55 108 720 3 757 346 722 240 122 36 9 1038 511 5975 935 3 759 535 401 Required Interpolation Interval along Section Line s 50 000 pe Once all Bend Points have been entered select the required Interpolation Interval for the section and then Click the Proceed button Page 35 A SURPAC Long Section through Lion s Head Table Mountain and Devil s Peak using a Path and Heights imported from Google Earth Creating KML Placemarks amp Polygons with linked Images Files SURPAC is able to create Google Earth KML files for both Placemarks and Polygons that have attached Images or Files or both When the Placemark or Polygon is displayed on Google Earth clicking on its icon will display locality information hypertext Links to files and the Images included for the Placemark or Polygon The Image Placemarks this wording is used to differentia
65. tively Should you not have these Source Files already loaded on your PC or Laptop you may download them from the Upgrade section of the Internet site www surpac co za This programme will automatically search and extract the Lo or WG Point information from the appropriate Source File SURPAC Software User s Manual Book 3 Important notes The above mentioned SURPAC Source Files are random binary files and as such the data they contain are not printable or accessible to Users Further the data contained in these files have had variable false origin shifts applied to them making the data meaningless even to someone who is able to hack their way into the files Anyone attempting to use data extracted from either of the two files is warned that highly inaccurate results will occur Keith W Young and SURPAC Surveying Software are not responsible nor are they liable for any damages or misinformation resulting from the unauthorized use of these data oince these Source File Points are stored in shifted Lat Long format any Degree Square boundaries become irrelevant to the programme Surveys can be located close to any Degree Square boundary and the programme will still generate its own Degree Square of Points centred about the Survey or any defined Point in the Survey Data may be drawn from different Degree Squares for any given Survey The programme offers User options for both the selection of Points an
66. to view imported and superimposed KML data from various view ports This can be done dynamically using the Mouse as follows e Panning Hold down the Mouse Left Hand button and move the cursor in the desired direction e Scaling Scroll the mouse scroll wheel forwards or backwards e 3D Object Viewing Move the cursor to the centre of the object then hold down the Mouse Middle button Moving the cursor forwards or backwards will change the Tilt vertical view point Moving the cursor left or right will change the Orientation horizontal view point The amount of vertical height exaggeration can be set in Google Earth by clicking on the Tools menu and selecting the Options menu item The following image of Table Mountain shows superimposed 20m contours generated in SURPAC from data imported from the Google Earth DTM The KML display uses the Clamp to Google Earth Surface option As this covers a large area and a large number of points a 50m grid was used the data had to be imported in two sessions Google Earth will only allow the downloading of 2 500 locations per user per day As SURPAC collects data at a rate of 4 points per location this maximum daily limit is increased to 10 000 points For areas that require more than this limit separate the area into two or more sections and download the data on consecutive days or just use a different e mail addresses if you have them Page 32 SURPAC Software
67. ts on Google Earth N Point Name Y Co ord X Co ord Top Left Point Pa 84362 301 2845270 150 2 Top Right Point p3 85940 223 2845279170 BotRightPoint po 86435236 2846804455 BotLeftPoint p4 84733 609 2847182 994 Set the required Grid Interval Set the required Description for Boundary Points EDGE z Set the required Description for all other Points SH Set the Starting Humber for Imported Points 0001 omen x o Page 26 SURPAC Software User s Manual Book 3 To ensure that the quadrilateral covers the correct area these 4 Points are best determined by using Google Earth to create Placemarks at the appropriate positions The quadrilateral does not have to be square nor does it need to be oriented NS or EW Any four Points that enclose the required area are sufficient One restriction is that when entering the 4 Points into the above form they must be entered in a clockwise sequence normally starting at the Point that is approximately the NW corner SURPAC will then proceed to calculate Tacheometric file points along the perimeter lines of the quadrilateral as well as on all Grid intersections lying within the quadrilateral using the defined Grid interval Once all points are calculated their heights are interpolated from Google Earth and all point data are added to the file These Tacheometric points are imported at a rate of approximately 350 500 Points per minute
68. tten Using this Option If you want to restrict the import of heights to selected Points then first highlight these Points in the Co ordinate file listing You can highlight Points by Highlight a block of Points by clicking on the first Point and then dragging the mouse cursor to the last required Point or I Highlight a block of Points by clicking on the first Point and then holding down the Shift keyboard key click on last required Point Il Highlight selected Points by clicking on the first Point then holding down the keyboard Ctrl key click on any other Points required Then in the Actions Menu click on the File Options menu item to display the File Options form The Google Earth options are at the bottom of this list of options Click on Import interpolated Google Earth Heights and then click on the OK button If you have highlighted a set of Points you will be prompted if you want to restrict the height importation to these Points Reply as appropriate Heights for the selected Points or for the entire file will now be imported via interpolation from the Google Earth DTM and displayed on the Co ordinate file listing These height importations are relatively slow and are imported at a rate of approximately 50 80 Point heights per minute depending on your internet connection speed The maximum Point heights that may be imported are restricted by Google Earth to 2 500 per 24 hour period 1 3 Compare Existing
69. ult search will be displayed You may now change any of the search parameters required as mentioned on the previous page Each displayed Bench Mark will initially have a green tick displayed next to it This implies that the Bench Mark is a required Bench Mark and which would be added to the current Co ordinate file when the Store and Exit Button is clicked If any Bench Mark is not required then click on that Bench Mark s green tick The symbol will be changed to a red cross and the Bench Mark s co ordinate display will be changed to an italic font This Bench Mark will now be flagged as not required and will not be added to the current Co ordinate file Clicking a Point s red cross will reverse the above process Page 48 SURPAC Software User s Manual Book 3 Click the Print List Button to send all those located and selected Bench Marks to the SURPAC Printing form From this form display this list may then be sent to the current Printer to a User defined ASCII file to an Excel file or to the Windows Clipboard When the Store and Exit Button is clicked all located Bench Marks displayed in the list and having the green tick symbol next to them will be added to the current Co ordinate File In the form area designated Google Earth options it is possible to either import interpolated heights for the Bench Mark positions by interrogating the Google Earth DTM or to send the list of selected Bench Marks to G
70. urpac GE folder The KMZ file can then be sent to a third party user with the instruction that the contents of the KMZ file must be extracted to a folder called C ASurpac GE Unzipping extracting the KMZ file will produce the parent file with a KML extension plus the mark icons and other information linked to the KML file Double clicking on the extracted KML file will then open Google Earth and produce the same data and or overlay view as produced by SURPAC Hints when using SURPAC CAD and Google Earth interfacing 1 If you intend to view multiple SURPAC data and or overlays in Google Earth then do not close Google Earth after each viewing Leave Google Earth in the background or minimize it whilst you generate the next view 2 If you have multiple views displayed any of these may be temporarily removed by un checking their display names in the Temporary Places section 3 When you do close Google Earth you will be queried as to whether you want to save the temporary view in the My Places section If you want the views to be permanent then reply Yes otherwise they will be deleted Page 17 SURPAC Software User s Manual Book 3 Importing a Google Earth Placemark into a Co ordinate File Creating a Placemark in Google Earth In Google Earth ensure that either the Toolbar or the Sidebar are displayed Move the Google Earth display to show the required area at the required scale To create a Placemark click th
71. vant to the programme Surveys can be located close to any Degree Square boundary and the programme will still generate its own temporary Degree Square of Points centered about the Page 46 SURPAC Software User s Manual Book 3 Survey or any defined Point in the Survey Data may be drawn from different Degree Squares for any given Survey The programme offers User options for both the selection of Bench Marks and the display mode used namely e The Search Centre position may be User selected e he number of located Bench Marks displayed may be set according to a required maximum number or a required maximum search radius e The display of located Bench Marks may be in order of Distance Direction or Point Name or Height Difference If the Google Earth DTM height values are displayed e Any of the located Bench Marks in the displayed list may be tagged as not required to prevent them from being added to the Co ordinate file or displayed on Google Earth e Located Bench Marks in the displayed list will have their Degree Square values shown e An output of the displayed list of located Bench Marks may be made to the Printer an ASCII file an Excel file or the Clipboard e The located Bench Marks in the displayed list marked as required i e the selected Bench Marks may be added to the current Co ordinate File e The list of Bench Marks may also be displayed on Google Earth The Google Earth DTM may also
72. will allow the overlay to completely hide the underlying imagery Note that on Google Earth itself there is a slide option on the Sidebar information display that allows for further refinement of the overlay s transparency level anm B 3 An overlay of a plan or sheet may also be viewed whereby the sheet background is completely transparent i e only the detail on the sheet such as the lines text hatching etc will be displayed For this option to apply the sheet background colour has to be white which is the case for all SURPAC CAD sheets 4 Line information sent from SURPAC to Google Earth can have the following options e Users can set the Lines to be sent using their defined Line Thickness values e Users can set the Lines Arcs Circles to be sent using their CAD defined Line Colour values e f Lines Arcs Circles are to be sent using a Single Colour then this colour can be User defined All SURPAC CAD programmes which use the Google Earth display function have a menu item whereby the Google Earth display options may be set or viewed The options may also be set by clicking the File options button when in the Co ordinate File Editing programme SURPAC Software User s Manual Book 3 The Locate and Add Nearest Trig TSM Beacons Programme This programme provides the facility of locating a set of the nearest Trigonometrical Beacons and or Town Survey Marks TSMs to a User defined geographical position

SURPAC Software User`s Manual - Book #3 (Google Earth Functions)

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