Creating a T-Data Statistics Map - 2D

RockWorks | Borehole Manager | T-Data | Statistics Map | 2-Dimensional

This program provides a means for quickly evaluating the range of g-values for a selected T-Data track without creating a 3D solid model.  You can choose to illustrate the highest, lowest, sum, or average data value.  The basic idea is that the program will extract an XY location for each borehole and the high/low/sum/average T-Data value (as requested) for that location and date range (if requested), and create a grid model and 2D map to illustrate this data. 

! This is different from a T-Data Plan Map in that this map is not extracted from an interpolated solid model - it's gridded directly from the data.

See also: 
      Creating a T-Data Statistics Map - 3D
      Generating a Statistical Report for a Column of T-Data Values
      Creating a Frequency Histogram for a Column of T-Data Values

Feature Level: RockWorks Standard and higher

Menu Options
Step-by-Step Summary

Menu Options

• T-Data Track: Click to the right to select the track or column in the T-Data table that is to be processed. Expand this heading to establish any source data filtering.
  • Spatial (XYZ) Filtering: Insert a check in this box to activate a data filter based on spatial coordinates. Expand this heading to establish the filter settings. 
  • Filter based on Date/Time: Insert a check in this box to process measurements for a specific date or range of dates.  If you leave this un-checked the program will process all of the measurements, for all listed dates, in a single output map.   Expand this heading to access the Filter Options.
    • Exact: Click in this button if you wish to enter a specific date (and time, if applicable) for the measurements to be processed.  Click on the date displayed after the Date/Time Target to type or pick from the calendar the specific date.  During map generation RockWorks will process the T-Data measurements for the selected track that fall on this date.
    • Range: Click in this button if you prefer to enter a beginning and ending date to define the range of dates to be included in the map. Click on the dates displayed after the Starting and Ending prompts to type in or pick dates from the calendar.  During modeling RockWorks will process the T-Data measurements for the selected track that fall within this date range.
  • Filter Based on G-Values: Activate this option to establish a data filter based on the measured values (geochemisty, etc.), and expand the heading to establish the filter parameters.  (More.)
     
• Map Type:  Choose one of the following by clicking in the appropriate radio button:
  • Z = Lowest T-Data Value: The contours will be based on the lowest g-value for the designated T-Data track.
  • Z = Highest T-Data Value: The contours will be based on the highest g-value for the designated T-Data track.
  • Z = Sum of T-Data Values: The contours will be based on the average of all of the g-values for the designated T-Data track. For non-vertical boreholes, the xy coordinates for this point will correspond with the last (lowest) T-Data point in the borehole.
  • Z = Average T-Data Value: The contours will be based on the average of all of the g-values for the designated T-Data track. For non-vertical boreholes, the xy coordinates for this point will correspond with the last (lowest) T-Data point in the borehole.
     
• Output Grid: Click here to type in the name to assign the output grid (.RwGrd) that will be created as a result of gridding the selected T-Data values.  Expand this heading to specify all of the gridding options.  
  • Gridding Options: Click on this button to access a window where you can establish the gridding method or algorithm, the grid dimensions, and other gridding options.
    • Algorithms: Select a gridding method from the list on the left, and establish the method-specific Options in the middle pane.
    • Grid Dimensions:  Specify how the grid dimensions are to be established, using the settings on the right side of the dialog box.  Unless there's a specific reason to do otherwise, you should probably leave the grid dimensions set to the current output dimensions.
    • Additional options: Establish the other general gridding options (declustering, logarithmic, high fidelity, etc.).

• Diagram Options
  • Background Image: Check this box to display a raster image behind the contours, and expand this heading to set the image options. (More.)
  • Contour Lines: Insert a check in this box to illustrate the T-Data grid with line contours. Expand this item to establish the contour settings. (More.)
  • Colored Intervals: Insert a check in this box to illustrate the data with color-filled intervals. Expand this item to establish these settings. (More.)
  • Fault Polylines: Check this box to include in the map any fault lines that are included in the gridding process.  (More.)
  • Labeled Cells: Insert a check in this box to display on the map the actual contents of the grid model. Expand this item to establish this layer’s settings. (More.)
  • Borehole Locations: Insert a check in this box to display the borehole locations with map symbols, with a variety of labeling options.  Expand this heading to access the symbol & label settings.  (More.)
  • Border: Check this box to annotate the map borders with axis titles and/or coordinate labels. Expand this item to access its settings. (More. ) 
    
    

Step-by-Step Summary

Follow these steps to create a 2D map that represents the T-Data summary:   

1. Access the RockWorks Borehole Manager program tab. 
2. Enter/import your data into the Borehole Manager.
3. Be sure the boreholes whose data is to be processed are enabled.
4. Select the T-Data | Statistics Map menu option. 
5. Enter the requested menu items, described above
6. Click the Process button to proceed.  

For vertical holes, the program will extract from the Location tab the X and Y locations for each active borehole.  It will then determine the highest, lowest, average, or sum of data values (as requested) for the selected track for each hole.  Along with the X and Y values, this new "Z" value will be passed to the gridding routine.

For inclined or deviated holes, the program will extract the X and Y locations from the Location tab if a min-value or max-value map was requested.  For average or sum maps, the X,Y coordinates for the borehole will correspond with the last (lowest) T-Data point in the hole.  The Z values will be determined in the same fashion as described above.

7. If you requested Confirm Dimensions, the program will first prompt you to confirm the default grid model dimensions.  (More.)

The program will then create the high, low, average, or sum grid model.  It will then create the 2D map using the requested diagram settings. The completed map will be displayed in a RockPlot2D tab in the Options window.

8. You can adjust any of the modeling or diagram option in the pane to the left and then click the Process button again to regenerate the T-Data statistics map.

   ! Each time you click the Process button, the existing map display will be replaced. 

9. View / save / manipulate / print / export the image in the RockPlot2D  window. 
   
   

 Back to T-Data Menu Summary

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