Flight Path Editor (T19)
Contents
1. Note Increasing the value of the Rate parameter means increasing the interval INTREPID displays fewer data points Viewing a single traverse line in red INTREPID can display the path of an individual traverse line in red You can specify the traverse line by its number or by clicking it in the display You can delete the selected line See Deleting traverse lines gt gt To display an individual traverse line in red using its number Choose Single Line In Red from the Line Display menu INTREPID displays the Select Line dialog box Choose the line number from the list box and choose OK INTREPID displays the traverse line path in red Select Line to Highilg Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 20 Library Help Top lt 4 Back gt gt gt To display an individual traverse line in red by clicking the line on the screen Mouse Mode O Zoom Query O Select Ends O Select Segmnt Select Line 1 Select Select Line mouse mode 2 Click the line you require INTREPID displays it in red gt gt To display a different traverse line Repeat the process just described INTREPID will return the previous line to white and display the new line in red gt gt To cancel single line in red display Choose No Line Colours from the Line Display menu Line data validation Some of the data from your survey may be unsuitable for your2. Intrepid Flight Path Editor V3 1b Line Dataset Validation Display traverse lines in red if _jZ value is not between 56403 50 and 58317 42 _j2 Gradient Z changes by more than ae over a distance of oO Z value is null _jFiducial sequence has been interrupted _ E Flight Path deviates by more than 50 over a distance of given a nominal bearing of aire NOTE Use Subsample of 1 for best visual result all 3 Turn on the data validation tests and specify the corresponding parameters as required then choose OK INTREPID displays the dataset with the traverse line paths or sections of paths that fail the data validation test shown in red i e the data for which the statements in the dialog box are true 4 Adjust the tests as required by repeating steps 2 and 3 above gt gt To cancel Line Data Validation in red display Choose No Line Colours from the Line Display menu Data validation tests and parameters Here is a detailed description of the data validation tests and parameters Z data ranges Z value is not between INTREPID will reject mark in red points whose Z values are outside the range you specify Specify lower and upper values of the range of Z values in the corresponding text boxes The default values are the maximum and minimum values of the Z data Here is an illustration of the results of a Z data range validation test Z value is null If you turn on this check box INTREPID d
3. Select Lines Using this mode you can select individual lines INTREPID displays the current selected line in red You can observe a selected line s path and extent and delete it if required See Deleting traverse lines and Viewing a single traverse line in red below for further details General display controls and options The Flight Path Editor has a large range of display controls and query operations We have provided these to enable you to visualise your datasets and in flight path editing to assist you with detecting traverse line segments that are unsuitable for inclusion in the dataset While using the Flight Path Editor with one or more datasets you can Zoom enlarge parts of the display and pan view different regions of the dataset displayed when it has been enlarged e View information about points or pairs of points in the display e Choose grey scale pseudocolour or sun angle display for grid datasets See Grid dataset display e Determine point size and colour according to the values of Z fields in point dataset display See Point dataset display e Choose from a wide range of line dataset display options See Line Dataset display Screen redrawing Library Help Top The Flight Path Editor is designed to work with datasets of unlimited size Large datasets require lengthy processing and therefore screen redrawing may take some time In order to show you the most up to data version of the datasets di
4. This section uses the terms click point and nearest subsampled data point See Querying points for an explanation of these terms Setting line segments to null involves two clicks on a traverse line In this section we will refer to these as the first click point and the second click point The following table describes the information shown under the headings in the Data Point Information Display area during Null Segment operations when you click a point in a line dataset display Heading Line Select Segment mode first click Line Select Segment mode second click kn X Y X Y coordinates of data point nearest to X Y coordinates of data point nearest to first click point first click point Line Line number of data point nearest to Line number of data point nearest to first first click point click point FID1 Fiducial number of data point nearest Fiducial number of data point nearest to to first click point first click point FID2 n a Fiducial number of data point on the same line nearest to second click point Value Value of grid cell at first click point Gf Value of grid cell at first click point Gf grid grid dataset displayed band 0 dataset displayed band 0 Dist m Distance from click point to nearest Distance from click point to nearest data data point point gt gt To remove segments from traverse lines 1 Choose Null Segment from the Modes options in the Flight Path Editor Main window House Mode O Zoo
5. Changing the colour and size Z field selection gt gt To specify or respecify the point colour or size Z fields If you did not specify a Z field for colour or size and now wish to do so or if you wish to change your field selection reload the point dataset using Load Point Dataset from the File menu and specify the colour and size Z fields as required gt gt To turn point colour or size display on or off Choose the Z Value as Point Colour and or Z Value as Point Size form the Point Display menu to turn the display on or off The options will have check marks against them if they are turned on File Edit Line Display MAJUS MEJE A Grid Display int Col z Line Dataset display Library Help Top The line dataset display has a large range of display options to enable you to both view and edit the dataset You can e Determine whether in Zoom mouse mode your line dataset display redraws quickly with lower precision or more slowly with full precision by specifying the display subsampling rate See Setting the display subsampling interval for details e View the total traverse line length of the dataset See Querying points for details e Click any part of any traverse line using the mouse and view for the nearest data point the X and Y coordinates the traverse line number the number and fiducial number See Querying points for details e Specify a traverse line by number or click it in the display and view
6. You can use sun angle this even though the measurements in the data may not actually be physical elevation For example if the measurements are levels of magnetism the sun angle display allows you to visualise a magnetic topography where hills are areas of high magnetism and valleys are areas of low magnetism This display mode is useful for highlighting linear trends or breaks in the grid that may be missed in ordinary colour or grey scale coded viewing Library Help Top 2012 Intrepid Geophysics q Back gt Flight Path Editor T19 14 4 Back gt INTREPID User Manual Library Help Top gt gt To specify sun angle display for your grid 1 Choose Grid With Sun Angle from the Grid Display menu INTREPID displays the Sun Angle for Grid Dataset dialog box Intrepid Flight Path Editor V3 1b Sun Angle for Grid Dataset Declination 45 000000 Inclination ABs0000005 V Exaggeration 100 000000 2 Specify Declination Inclination and Vertical Exaggeration as required then choose OK INTREPID displays the grid in sun angle format Declination is the compass direction of the line from the overhead point to the sun A declination of 0 means that the sun is North of the overhead point A declination of 90 means that it is East of the overhead point 90 means West and 180 or 180 means South The default declination is 45 Inclination is the angle of the sun between the horizon and
7. If you have previously prepared input line dataset specifications for Flight Path Editor load the corresponding task specification file using Load Options from the File menu See Specifying input and output files for detailed instructions Note that in interactive mode INTREPID will only use the input line dataset specifications in a Flight Path Editor task specification file See Displaying options and using task specification files for more information If you do not wish to load any further datasets go to step 5 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 2 Library Help Top Library Help Top 10 11 lt 4 Back gt Specify the dataset s that you wish to display or edit Use Load Line Dataset Load Point Dataset and or Load Grid Dataset from the File menu as required See Specifying input and output files for detailed instructions If you are displaying a grid dataset INTREPID will first display it using grey scale If you are displaying a point dataset INTREPID will prompt you to specify Z fields for the colour and size of the points displayed INTREPID displays the dataset s in the Flight Path Editor Main window Examine and or manipulate the display of the dataset s according to your requirements as follows You may also perform these operations during flight path editing in step 7 If you are displaying a grid dataset switch between grey scale pseudo
8. Path Editor Main window See Mouse mode summary for details To view the current set of traverse line editing specifications choose Report from the Window menu INTREPID displays the Flight Path Editor Report window See Displaying options and using task specification files for details and an example of a set of specifications e You can view Help information by choosing options from the Help menu See Help e You can execute Flight Path Editor line editing tasks as a batch task using a task specification job file that you have previously prepared See Displaying options and using task specification files for details Specifying input and output files To use Flight Path Editor you will need to specify the dataset s you wish to view If you wish to examine the Z data from a line dataset during the process you must also specify the Z field If you wish to edit a line dataset and save the edited data specify field names for the new X and Y geographic location data INTREPID identifies the X Y line number and fiducial fields using dataset aliases The dataset must have the following aliases identifying appropriate field files X coordinate geographic location Y coordinate geographic location LineNumber line number fiducial sequence These fields are optional If you do not specify them INTREPID will prompt you with an Open dialog box to specify them If you do not specify them INTREPID will use a default sy
9. We 7 ay 7 iy f i Setting the display subsampling interval Available in Zoom mouse mode only Each time you perform an operation or change an option INTREPID will redraw the screen For a large line dataset this may take too long While you are using Zoom mouse mode you can speed up the display at the cost of display precision by reducing the subsampling interval For example if you set the subsampling interval to 2 INTREPID will only display every second data point on the screen The default subsampling interval for Zoom mouse mode is 10 If you select a mouse mode other than Zoom the subsampling interval changes to 1 If you return to Zoom mode the subsampling interval returns to the set value See Mouse mode summary for general information about mouse modes Library Help Top 2012 Intrepid Geophysics lt 4 Back gt INTREPID User Manual Flight Path Editor T19 19 Library Help Top 4 Back gt gt gt To specify the subsampling interval 1 Ensure that you are using Zoom mouse mode 2 Choose Set Subsampling Rate from the Line Display menu INTREPID displays the Subsampling for Line Display dialog box Intrepid Flight Path Editor 3 1b Subsampling for line display Rate l o d l _ _ _ _ _ Specify the subsampling interval in the Rate text box and choose OK INTREPID will redraw the display with the new subsampling interval whenever you are using Zoom mouse mode
10. Y Fields Use this option to save the results of the flight editing process in new X and Y geographic coordinate fields INTREPID displays separate Save As dialog boxes for the X and Y field files If you will be using INTREPID tools that require X and Y aliases and wish these fields to become the new main X and Y fields for the dataset edit the aliases accordingly See Editing the dataset aliases in INTREPID Old Project Manager T01 for detailed instructions Save Validation Field Use this option to save a new field in the loaded line dataset containing results of the current line data validation process See Saving line data validation results for details Load Point Dataset Use this option to specify a point dataset if you wish to display one If you choose this option INTREPID displays the Load Z Field for Point Size and Load Z Field for Point Colour dialog boxes Respond to the dialog boxes accordingly See Point dataset display for an explanation of this use of Z fields Load Grid Dataset Use this option to specify a grid dataset if you wish to display one INTREPID displays the dataset using grey scale You can change the display to pseudocolour or sun angle and set the parameters for each display style See Grid dataset display for instructions Load Options If you wish to use an existing task specification file to specify the input line dataset use this option to specify the task specification file required INTREPID will load the
11. its path See Viewing a single traverse line in red for details For a selected Z field view the traverse line paths with points failing your data validation criteria coloured in red You can also save a new field in the line dataset containing the data validation results See Line data validation for details Fora selected Z field apply fixed range pseudocolour to the lines indicating values of the Z data See Showing Z values as line colour for details e View markers indicating the directions of the traverse lines See Viewing line direction marks for details For a selected Z field view noise in the field as a profile superimposed on the traverse lines See Viewing Z data noise for details If you require a Z field for use in the display specify it using the Load Z Field for Line Dataset option from the File menu See Specifying input and output files for details You can control most of the line dataset display features using options from the Line Display menu 2012 Intrepid Geophysics q Back gt INTREPID User Manual Flight Path Editor T19 18 Library Help Top lt 4 Back gt Behe Point Display Grid Display Single Line in Red Line Data Validation in Red Z Yalues as Line Colour No Line Colours Show Line Direction Show Noise Profile of Z Field Display Subsampling The following illustration shows a line dataset as the Flight Path Editor originally displays it
12. size and colour of the markers according to the values in Z fields Specifically you can e Select a Z field whose value will determine the size of the point markers in the display and turn this aspect of the display on and off as required e Select a Z field whose value will determine the colour of the point markers in the display and turn this aspect of the display on and off as required In each case INTREPID assigns the sizes or colours according to a fixed range system where each size or colour has a value range the same size INTREPID assigns the colours from the pseudocolour 1lut lookup table See Colour Lookup Tables in INTREPID database file and data structures R05 for more information INTREPID assigns sizes according to the range of Z values The following illustration of a point dataset overlaying a grid is an Euler Deconvolution estimating depth of magnetic sources The following illustrations are enlargements of sections of the display above Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 4 Back gt Library Help Top When you first specify the point dataset for display using Load Point Dataset from 17 the File menu as well as prompting you to specify the point dataset INTREPID will prompt you to specify a Z field to determine point colour and a Z field to determine point size See Specifying input and output files for details
13. you are displaying the data using grey scale or pseudocolour 2 Choose Histogram from the Grid Display menu INTREPID displays the Histogram Options for Grid Dataset dialog box histogram options for Grid Dataset bin width 0 300000 3 Set the Bin Width parameter if required and choose OK INTREPID will redisplay the grid using the equalising histogram Bin width In a piecewise linear histogram the data 1s grouped in bins according to rank Each bin contains a fixed number of data items of approximately the same value The bin width parameter specifies the percentage of the data occupying one bin The default value of 3 results in about 330 bins If you increase the bin width resulting in fewer bins the data will have larger clusters and fewer different colours If you decrease the bin width resulting in more bins the data will have smaller clusters and a greater variety of colours gt gt To turn off the equalising histogram display 1 Choose Histogram from the Grid Display menu INTREPID displays the Histogram Options for Grid Dataset dialog box 2 Choose Cancel 3 Click the pan zoom indicator box or slightly adjust the window size to force a screen redraw Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 16 Library Help Top 4 Back gt Point dataset display You can display a point dataset as a set of square markers INTREPID can vary the
14. you can restore it using Undo from the Edit menu You can restore all of the ends and segments deleted INTREPID will restore them in reverse order with each Undo operation starting with the end segment most recently deleted Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 30 Library Help Top 4 Back gt Help You can use the Help menu to display help text on the topics shown in the menu illustration below File Edit Line Display PointDisplay Grid Display Window Flight Path Editor Main Window gt gt i File Edit Line Display gt gt Point Display Grid Display gt gt Window Batch Processing Exit To exit from Flight Path Editor choose Quit from the file menu Displaying options and using task specification files Displaying options To display the current line dataset file specifications and a record of any line editing you have performed choose Report from the Window menu File Edit Line Display Point Display Grid Display Badii oin INTREPID displays the Flight Path Editor Report window containing this information Using task specification files You can store line dataset file specifications and line editing process specifications for Flight Path Editor in task specification job files Note In interactive mode INTREPID will only use the input line dataset specifications in a Flight Path Edito
15. 244 Y alue Km 390 42916 Choose Query from the Mouse Mode option buttons near the lower left corner of the Flight Path Editor main window INTREPID displays information in the Status area at the top of the Command area of the Flight Path Editor Main window gt gt To view information about a point Click it with the left mouse button and view the information in the Status area gt gt To view information about a pair of points Drag from one point to the other using the left mouse button then view the information in the Status area If INTREPID is displaying a grid without a line dataset it displays information about the point on the grid that you click If INTREPID is displaying a line dataset it displays information about the nearest point on a line to the click point The following definitions diagram and tables will help to explain the way that Flight Path Editor reports information to you The click point is the position on the display which you click with the left mouse button The start point and finish point are the mouse button down and mouse button release points when you perform a left mouse button drag across part of the display If you consider a traverse line display as a set of line segments joining data points the point on a line nearest to the click point is the point on a line segment nearest to the click point 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T1
16. 9 10 Library Help Top 4 Back gt The following illustration shows a click point data points and lines ye Subsampled data point Click Point d Nearest subsampled data point on line j Neies point on line Subsampled data point Subsampled data point The following table describes the information shown in the Status area during single click query operations far Grid only Line or Line Grid Query Mode wa Surveydistance distance C Y X Y coordinate a click X Y coordinates ee data point nearest to point click point Line Line number of data point nearest to click point FID1 Fiducial number of data point nearest to ee a ee FID m n grid cell at click Value oo grid cell at click point if grid point band 0 dataset displayed band 0 Dist m Distance from nearest point on a line to nearest line data point The following table describes the information shown under these headings during left mouse button drag query operations ae Grid only Line or Line Grid Query Mode nia sf Survey distance distance CE Y X Y coordinates ee start X Y coordinates eee data point nearest to point start point Line Line number of data point nearest to start point FID 1 Fiducial number of data point nearest to start n Value of grid cell at Value ee grid cell at start point if grid start point band 0 dataset displayed band 0 Dist m distance between start Distance from line data point nearest sta
17. EPID assigns line numbers to the data groups lines as they occur starting with 0 If there is a Fiducial alias INTREPID uses the data in the fiducial field If there is no Fiducial alias INTREPID assigns fiducial sequence numbers to the points as they occur in the dataset starting with 0 In this case INTREPID will not be able to detect fiducial sequence interruptions See Line data validation for details Mouse mode summary Flight Path Editor has a variety of mouse operations determined by the mouse mode options located at the bottom of the Main window Command area Mouse Mode Zoom Query Select Ends Select Segmnt Select Line gt gt To select a mouse mode Select the corresponding Mouse mode option button Zoom Using this mode you can define rectangular regions for zooming the data display See Zooming and panning the display for details Query Using this mode you can click points and drag between pars of points to obtain information about the data they represent See Querying points for details Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 6 Library Help Top lt 4 Back gt Select Ends Using this mode you can specify ends of traverse lines for clipping See Deleting the ends of traverse lines Select Segments Using this mode you can specify segments of traverse lines for clipping See Deleting segments of traverse lines
18. INTREPID User Manual Flight Path Editor T19 1 Library Help Top lt 4 Back gt Flight Path Editor T19 Top The Flight Path Editor has two functions as an INTREPID tool It provides traverse line path editing facilities which enable you to check the spatial coherence of a survey You can view and verify different aspects of the dataset including a range of data validation tests You can delete sections of traverse lines that do not meet your specifications The Flight Path Editor is a quick and effective tool for checking survey quality It enables you to visualise and superimpose different types of datasets which are spatially coincident and perform useful functions such as query and zoom and pan The Flight Path Editor tool gt gt To use Flight Path Editor with the INTREPID graphic user interface 1 Choose Flightpath from the Edit menu in the Project Manager or use the command fedit exe INTREPID displays the Flight Path Editor Main window Intrepid Flight Path Editor 3 2beta8 File Edit Line Display Point Display Grid Display Window Help Select Ends Select Segmnt Select Line 2 If you will be processing a large line dataset and wish to speed up the data display Library Help Top on the screen or otherwise wish to adjust the display subsampling rate adjust it using the Display Subsampling option from the Line Display menu See Setting the display subsampling interval for details
19. colour and sun angle displays and modify the parameters for these display formats as required using options from the grid display menu See Grid dataset display for details If you are displaying a points dataset turn colour and size Z data display on and off as required See Point dataset display for details If you are editing or displaying a line dataset and wish to examine a Z field during the process specify the corresponding Z field using Load Z Field For Line Dataset from the File menu See Specifying input and output files for detailed instructions Zoom enlarge an area of the display and or pan examine different regions while enlarged See Zooming and panning the display for information Query points or distances or pairs of points in a single line of a line dataset in the dataset display INTREPID will report information about the point s in the Flight Path Editor Main window See Querying points for details If you are not editing a line dataset go to step 10 Detect the portions of traverse lines that you wish to delete by Viewing the dataset with appropriate display options Using query operations See Line Dataset display for details Save the results of line data validation tests if required See Saving line data validation results for details Set segments and ends of traverse lines to null as required Specify the end or segment and use Delete End Segment from the Edit menu See Deleting segments of trav
20. erform this process as often as you wish with different validation tests each time specifying a different field name gt gt To save the line data validation results 1 2 Specify and display the results of a line data validation test as described above Choose Save Validation Field from the File menu INTREPID displays a Save As dialog box Specify the name for the new field and choose OK See Specifying input and output files for detailed instructions Showing Z values as line colour Library Help Top If you have specified a Z field you can display its values using fixed range pseudocolour INTREPID will colour the traverse line paths in the display according to the value of the Z field INTREPID assigns the colours from the pseudocolour 1lut lookup table See Colour Lookup Tables in INTREPID database file and data structures R05 for more information 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 24 Library Help Top lt 4 Back gt gt gt To display the Z field as line colour 1 Ensure that you have specified a Z field See Specifying input and output files 2 Choose Z Value as Line Colour from the Line Display menu INTREPID displays the line colours accordingly T e ig ear To turn off Z value as line colour display Choose No Line Colours from the Line Display menu Viewing line direction marks You can choose whether to display the directio
21. erse lines for details Repeat the data viewing and editing operations steps 5 9 or 4 9 including adjusting loaded datasets as required If you wish to save the edited data specify field names for the new X and Y geographic location data using Save Output X and Y Fields from the File menu INTREPID will save the new X and Y data for your dataset as specified See Specifying input and output files for detailed instructions 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 3 Library Help Top lt 4 Back gt 12 If you wish to record line dataset input and output specifications and the editing operations performed in this session as a task specification job file in order to repeat a similar task in batch mode later or for some other reason use Save Options from the File menu See Specifying input and output files for detailed instructions Note that the Flight Path Editor can only record input and output line dataset field specifications and line editing processes in task specification files See Displaying options and using task specification files for more information 13 If required repeat steps 2 12 varying the parameters and or data files as required 14 To exit from Flight Path Editor choose Quit from the File menu Notes e You can control the effect of mouse operations in the dataset display area using the Mouse Mode options in the Command area of the Flight
22. file and use its contents to load the corresponding line dataset See Displaying options and using task specification files for more information Save Options If you wish to save the current Flight Path Editor line dataset input and output specifications and the editing operations performed in this session as a task specification file use this option to specify the filename and save the file See Displaying options and using task specification files for more information Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 5 Library Help Top lt 4 Back gt Changing aliases after using the Flight Path Editor After the flight path editing process you will have a new version of the X Y geographic location data You may wish this data to become the principal X Y data for the dataset If so you will need to assign the X and Y aliases to these fields For example the original X and Y fields may be called Xorig and Yorig After flight path editing you may have saved the corrected X and Y fields as Xvalid and Yvalid In this case you would need to assing the X and Y aliases to these new fields See Editing the dataset aliases in INTREPID Old Project Manager T01 for detailed instructions Line fiducial and point numbers If the dataset has a line numbers alias LineNumber INTREPID uses the line numbers from this field If there is no LineNumber alias INTR
23. grid cells whose value is less than or equal to the Low Clip value The highest ranking shade to all grid cells whose value is greater than or equal to the High Clip value The other shades in the grey scale range to other cells in the grid on the basis described above gt gt To specify grey scale display for your grid 1 Choose Grid With GreyScale from the Grid Display menu INTREPID displays the Pseudocolour for Grid Dataset dialog box Intrepid Flight Path Editor 3 1b Pseudocolour for Grid Dataset Low Clip 0 000000 77 High Clip 0 000000 77 The Low Clip and High Clip text boxes will at first contain the minimum and maximum cell values Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 13 Library Help Top 4 Back gt 2 Specify or reset Low Clip and High Clip values if required To restore the Low Clip and High Clip values to the minimum and maximum cell values choose Reset Otherwise enter the values in Z units in the corresponding text boxes 3 Choose OK INTREPID displays the grid using grey scale Sun Angle display Sun angle display creates the illusion of the sun shining on the image from a chosen angle creating a system of illuminated areas The sun angle effect enables you to visualise the grid in terms of hills and valleys It interprets a high measurement in a sample as a hill and a low measurement as a valley
24. ification file example Process Begin Name flightEdit Xin ebagoola_s x Yin ebagoola_s y Xout ebagoola_S x_triml Yout ebagoola_S y_triml Parameters Begin EditDelta Begin EditType CutEnd Line 30 Point 62 EditDelta End EditDelta Begin EditType NullSegment Line 6 Pointl 277 Point2 176 EditDelta End Parameters End Process End Library Help Top 2012 Intrepid Geophysics 4 Back gt
25. include the Z values from deleted data points You can delete a whole traverse line all data points from a chosen point to the nearest end of the traverse line or all of the data points in a line segment that you specify Deleting traverse lines gt gt To delete a traverse line 1 Select the line See Viewing a single traverse line in red for instructions File Line Display Point Display Delete end segment Delete line Undo 2 Choose Delete Line form the Edit menu Deleting the ends of traverse lines Library Help Top This section uses the terms click point and nearest subsampled data point See Querying points for an explanation You can select the ends of a number of lines for deletion then delete all of the selected ends with a single Edit menu operation To select the second and subsequent line ends for deleting all at once hold down CTRL when you click them When you have selected all line ends choose Delete end segment from the Edit menu 1 Note that in this operation you are setting the values in the X and Y fields to null In the Z data is null data validation test INTREPID identifies the points whose Z field value is null If you set parts of lines to null using the process described in the current section the lines will disappear from the display The only connection between this process and the data validation test is that you may have used some data validation testing to identify
26. isplays all points in red for which the corresponding Z data value is null 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 22 Library Help Top Library Help Top lt 4 Back gt Z gradient is too high noise Z changes by more than You may wish to eliminate segments of traverse lines whose corresponding Z values are noise or spikes To identify noise and spikes locate traverse line segments where Z data is changing rapidly 1 e where the gradient of the Z data is high You may also wish to identify noise in diurnal base station data such as that caused by sun activity This noise has a much greater wavelength than noise and spikes in your survey data Specify a distance over which you wish to measure the gradient the maximum allowable change in Z units over this distance The default parameters are the recommended settings for detecting magnetic noise in diurnal data a change of 100 Z units over 5000 distance units Flight path deviates too far from nominal bearing Flight path deviates by more than You may wish to retain only traverse line data whose direction is close to a specified nominal bearing Specify a distance over which you wish to test the direction the maximum allowable deviation in distance units over this distance and the nominal bearing to which valid lines should conform The default parameters are a deviation of 50 distance units
27. lines for removal 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 27 Library Help Top Library Help Top lt 4 Back gt The following table describes the information shown under the headings in the Status area during Delete Ends operations when you click a point in a line dataset display im FID1 Fiducial number of data point nearest to click point FID2 n a Value Value of grid cell at click point Gf grid dataset displayed band 0 Dist m Distance from click point to nearest data point gt gt To delete an unwanted end of a traverse line Choose Select Ends from the Mouse Mode options in the Flight Path Editor Main window House Mode O Zoom Query Select Ends Select Segmnt O Select Line 2 Click the starting point from which you wish to delete the traverse line INTREPID displays information about the point as described in the table above ebagoola 5ST Type Line A a aes Y 8419617 7 Line 3021 FIDI 359118 FID Dist m 44 6052744 Y alue km 390 42916 3 Delete the line end using Delete End Segment from the Edit menu Line Display Point Display Delete end segment Delete line Undo INTREPID will redraw the display without the traverse line end 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 28 Library Help Top 4 Back gt Deleting segments of traverse lines
28. m Query O Select Ends Select Seqmnt Select Line 2 Click the first point of the segment you wish to remove INTREPID displays information as described in the table above Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 29 Library Help Top 4 Back gt 3 Click the second point of the segment you wish to remove INTREPID displays information as described in the table above ebagoola 5 Type Line A Of A TBF9_2 Y B4l 71117 Line 2961 FIDI 581254 FID 580876 D ist m 21 897038 alue k m 391 3791 1 If you choose further points INTREPID will use them to replace point 1 and point 2 FID1 and FID2 alternately 4 Delete the line segment using Delete End Segment from the Edit menu File Line Display Point Display Delete end segment Delete line Undo INTREPID will redraw the display without the line segment Deleting parts of traverse lines example The following example shows traverse lines whose ends cross over traverse lines that pass too close to other traverse lines and traverse lines whose ends overlap In the second illustration these problems have been corrected leaving a set of traverse lines that is evenly spaced without redundant data from overlapping ends or traverse lines that are too close to each other Restoring deleted line ends and or segments Undo If you remove a traverse line end or segment by mistake
29. n marks at each end of each traverse line gt To turn line direction marks display on or off Show e Dir n the Line Di me ntrols whether line direction a Ba ch time you eh n the marker displa o oa When direction marker di _ ay i oa menu option has eck ma H Viewing Z data noise For the Z fi n Bo splay of Z data that could be regarded a ine r p di ae y INTREPID di is rts the tra e lin paths to sae e pro vofiles These profiles portray the n Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 25 Library Help Top Library Help Top 4 Back gt gt gt To display Z noise profiles 1 Choose Show Noise Profile of Z from the Line Display menu INTREPID displays the Noise Profile Settings for Z Field dialog box Nowe Profile Settings for Z Field Tolerance 2 units 0 00000 Wavelength data points 5 0000 Scale Zunits cmj 50 0000 Base Yalue 2 units 0 00000 2 Specify the parameters according to your requirements and choose OK INTREPID displays the Z Noise profiles li 3 Adjust the parameters as required by turning off noise profile display then repeating steps 1 and 2 above Tolerance The tolerance 1s the minimum wave amplitude below which you will not consider an anomaly to be noise or a spike Specify the tolerance in Z units Wavelength The wavelength is the maximum wavelength number of data points above which y
30. ou will not consider an anomaly to be noise or a spike Vscale The vertical scale is the relative height of the noise profile display in Z units per display centimetre INTREPID subtracts the Z data base value before calculating the profile height Base Value In the context of noise profile display in the Flight Path Editor we recommend that you use a base value of 0 gt gt To turn off display of the Z noise profile Choose Show Noise Profile of Z from the Line Display menu INTREPID will redraw the display without the Z noise profile gt gt To modify the Z noise profile parameters Turn Z noise profile display off then on again When you turn it on INTREPID displays the Z Noise Profiles dialog box again see above for instructions Choose 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 26 Library Help Top 4 Back gt Editing line dataset flight paths If you wish to delete some data points in your line dataset so that they are not used in further processing of the survey you can set the X and Y fields for those points to null This disables the points without disturbing the integrity of the data INTREPID cannot use the deleted points for operations such as gridding but it retains the other data for the points such as line numbers fiducial numbers Z data etc For example if you viewed the Z data using the Histogram tool See Histograms TO8 the tool would
31. over a distance of 5000 distance units INTREPID calculates the average strike of the traverse lines and offers this value as the default nominal bearing Here is an illustration of the results of a traverse line direction validation test Fiducial sequence has been interrupted If the fiducial sequence has a discrepancy between a pair of adjacent points there may be a data fault at this point in the traverse line For example In this fiducial sequence corresponding to a set of adjacent points in a line some numbers have been omitted 34 35 36 37 38 45 46 47 48 All points in the traverse line from the point of the interruption shown in bold may be invalid 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 23 Library Help Top lt 4 Back gt In this fiducial sequence there is a small range where the fiducial sequence is incorrect but the sequence continues correctly after the interruption 21 22 23 24 25 26 543 544 29 30 31 In this case only the points with the incorrect fiducial sequence numbers may be invalid If you turn on Fiducial sequence has been interrupted INTREPID will show all points that are invalid as illustrated in the above examples Saving line data validation results You can record the data validation results in a new dataset field This field contains the value 1 for invalid data points red and O for valid white data points You can p
32. purposes because of faults or because it does not comply with standards that you have set You can refer to this data as invalid INTREPID has a variety of data validation tests available for your data After applying the criteria you select INTREPID displays the invalid traverse lines or parts of traverse lines in red You can choose from the following criteria For each criterion a point will fail and be coloured red if the criterion statement is true The Z value at the point is e Not within a given range Null The point is within part of the traverse line where The gradient of the Z data is too high e there is Z data noise The flight path deviates too far from a given nominal bearing The fiducial sequence has been interrupted You can save line data validation results in a new field in the dataset INTREPID saves the validation data as 0 for valid red and 1 for invalid red gt gt To apply data validation tests to your data and view the failed data in red 1 Ifyou are using tests which involve a Z field ensure that you have specified this field See Specifying input and output files for details Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 21 Library Help Top Library Help Top lt 4 Back gt 2 Choose Line Data Validation In Red from the Line Display menu INTREPID displays the Data Validation Parameters dialog box
33. r task specification file The Flight Path Editor tool can only record input and output line dataset field specifications and line editing processes in task specification files gt gt To create a task specification file with the Flight Path Editor tool 1 Specify all line dataset files and perform all editing operations 2 Choose Save Options from the File menu Specify a task specification file INTREPID will add the extension job INTREPID will create the file with the settings current at the time of the Save Options operation For full instructions on creating and editing task specification files see INTREPID task specification job files RO6 Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 31 Library Help Top lt 4 Back gt gt gt To use a task specification file in an interactive Flight Path Editor session Load the task specification job file File menu Load Options Only line dataset input file specifications will be used gt gt To use a task specification file for a batch mode Flight Path Editor task Only line dataset loading editing operations and saving are available Type the command fedit exe with the switch batch followed by the name of the task specification file For example if you had a task specification file called surv329 job in the current directory you would use the command fedit exe batch surv329 job Task spec
34. rt point and finish point point to line data point on the same line nearest finish point Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 11 Library Help Top lt 4 Back gt Grid dataset display If you are viewing a grid dataset you can choose pseudocolour grey scale or sun angle display INTREPID uses grey scale when it first displays the grid Use the options from the Grid display menu to specify your grid display method File Edit Line Display Point Display WeLCENE JE A Vindow Help Grid with PseudoColour Grid with GreyScale Grid with Sun Angle Pseudocolour display If you choose pseudocolour display without modifying the Low Clip and High Clip parameters INTREPID will apply a fixed range pseudocolour display to your grid This involves dividing the range of cell values in your grid into equal parts corresponding to pseudocolour values and assigning colours to the cell values accordingly The 256 basic pseudocolour values are set out in the lookup table pseudocolour lut See Colour Lookup Tables in INTREPID database file and data structures R05 for details If you set Low Clip and or High Clip values INTREPID will assign e The lowest ranking colour to all grid cells whose value is less than or equal to the Low Clip value e The highest ranking colour to all grid cells whose value is greater than or equal to the High Clip value e The o
35. splayed INTREPID performs redraws after most operations The delays caused by these redraws may cause some frustration Due to our efforts to minimise screen redraws INTREPID may fail to redraw the screen occasionally when you do require a redraw This section explains how to alleviate screen drawing delays and how to trigger a screen redraw if required If screen redrawing is too slow e Choose Stop Redraw in the Command area if you do not require the current redraw before performing the next Flight Path Editor operation If line dataset redrawing is slow decrease the display subsampling rate and remain in Zoom mouse mode whenever possible INTREPID will only redraw the proportion of data points specified by the rate See Setting the display subsampling interval for further details about subsampling Ifyou have several datasets loaded e g a line dataset and a point dataset anda grid dataset consider performing your operations without one or more of the datasets 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 7 Library Help Top 4 Back gt If you need to trigger a screen redraw gt gt To trigger a screen redraw e Click the pan zoom indicator square in the Command area or e Change the size of the Flight Path Editor window slightly by dragging its border Zooming and panning the display Library Help Top You can enlarge and reduce the display zoom in and o
36. stem to create the missing numbers SeeLine fiducial and point numbers for details See Vector dataset field aliases in INTREPID database file and data structures R05 for more information about aliases Choose the options as required from the File menu 2012 Intrepid Geophysics 4 Back gt Library Help Top INTREPID User Manual Flight Path Editor T19 4 Library Help Top lt 4 Back gt Edit Line Display Point Display Load Line Dataset Load Z Field for Line Dataset save Output and Y Fields save Yalidation Field Load Point Dataset Load Grid Dataset Load Options save Options In each case INTREPID displays an Open or Save As dialog box Use the directory and file selector to locate the file you require See Specifying input and output files in Introduction to INTREPID R02 for information about specifying files Load Line Dataset Use this option to specify the line dataset you wish to examine or edit INTREPID will open the dataset locate the X and Y geographic coordinate fields using dataset aliases and display the lines in the Flight Path Editor Main window Load Z field for Line Dataset Use this option to specify the Z field that you wish to use for The Z data noise profile display See Viewing Z data noise for details or The Z data range Z data gradient or Z data null data validation displays See Line data validation for details Save Output X and
37. tal Km 0 0 Zoom In Zoom Out Stop Redraw Mouse Mode Zoom Query C Select Ends C Select Segmnt gt gt To pan a zoomed in display view different parts Zoom In otop Redraw The Pan zoom indicator at the right of the Flight Path Editor Main window in the centre consists of a small square within a larger square The large square represents the whole display and the small square the part visible on the screen When you drag the small square to a different part of the large square INTREPID shows the corresponding part of the display If you have zoomed out to view the whole display the small square may occupy the whole of the large square and may therefore not be visible You can use the Pan zoom indicator at any time no matter what Mouse Mode Query Clip Ends Null Segment Zoom you have selected Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 9 Library Help Top lt 4 Back gt Querying points Library Help Top INTREPID can display information about Individual points if you click them in your display or e Start and finish points if you mouse drag across a section of the display This section describes the information obtained while you are using Query mouse mode gt gt To view information about a point or pair of points ebagoola 5ST Type Line A OPA 2 Y 8419617 7 Line 3021 FID1 359118 FID Dist m 44 605
38. the overhead point An inclination of 0 means that the sun is on the horizon and an inclination of 90 means that it is at the overhead point The default inclination is 45 Vertical Exaggeration is the size of the contrast between high and low values If you increase the Vertical Exaggeration the hills will appear higher and the valleys deeper The default vertical exaggeration is 100 Here is an illustration of sun angle grid display Modifying the parameters of the current display format You can modify the parameters of the current grid display format by choosing its menu option again or specifying an equalisation histogram Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 15 Library Help Top lt 4 Back gt gt gt To modify pseudocolour grey scale or sun angle display parameters 1 Choose Grid with Pseudocolour or Grid with Sun Angle accordingly from the Grid Display menu INTREPID displays the corresponding dialog box 2 Modify the parameters as required and choose OK INTREPID displays the grid using the modified parameters Equalising histogram If you are using the grey scale or pseudocolour display you can use an equalising histogram to distribute the colours or shades so that each colour or shade has the same area in the display i e the same number of grid cells gt gt To turn on the equalising histogram display 1 Ensure that
39. ther colours in the pseudocolour range to other cells in the grid on the basis described above gt gt To specify pseudocolour display for your grid 1 Choose Grid With Pseudocolour from the Grid Display menu INTREPID displays the Pseudocolour for Grid Dataset dialog box Intrepid Flight Path Editor 3 1b Pseudocolour for Grid Dataset Low Clip 0 000000 High Clip 0 000000 7 2 Specify or reset Low Clip and High Clip values if required To restore the Low Clip and High Clip values to the minimum and maximum cell values choose Reset Otherwise enter the values in Z units in the corresponding text boxes Library Help Top 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 12 Library Help Top lt 4 Back gt 3 Choose OK INTREPID displays the grid using pseudocolour Grey scale display If you choose grey scale display without modifying the Low Clip and High Clip parameters INTREPID will apply a fixed range grey scale display to your grid This involves dividing the range of cell values in your grid into equal parts corresponding to grey scale values and assigning colours to the cell values accordingly The 256 basic grey scale values are set out in the lookup table greyscale lut See Colour Lookup Tables in INTREPID database file and data structures R05 for details If you set Low Clip and or High Clip values INTREPID will assign The lowest ranking shade to all
40. ut and view different parts of it pan gt gt To zoom in and out enlarge reduce by steps To zoom in enlarge the display choose Zoom In in the Command area of the Flight Path Editor Main window Each time you choose this button INTREPID will enlarge the display by 25 To zoom out reduce the display choose Zoom Out in the Command area of the Flight Path Editor Main window Each time you choose this button INTREPID will reduce the display by 25 You can use these buttons at any time no matter what mouse mode you have selected gt gt To zoom in on a Selected area of the display Select Zoom from the Mouse Mode options Mouse Mode Zoom Query Select Ends Select Segmnt O Select Line Hold down the left mouse button and drag diagonally corner to corner across the area that you wish to enlarge INTREPID will enlarge the selected region to fill the Data area of the window If you choose Zoom Out having used this zooming in process INTREPID will immediately zoom out to the full dataset display 2012 Intrepid Geophysics 4 Back gt INTREPID User Manual Flight Path Editor T19 8 Library Help Top 4 Back gt The illustration below is the a zoomed in part of the grid dataset illustrated in section Grid dataset display f Intrepid Flight Path Editor 3 2 File Edit Line Display Point Display Grid Display Window Help mlevel_grid Type Image X FID2 Dist m 0 0 Value to
Download Pdf Manuals
Related Search