Filtering Solid Models Based on Node to Borehole Distance

RockWorks | ModOps | Solid | Filters | Distance Clipping

The Distance Clipping filter is used to filter an existing solid model file based on the nodes' distances from the control points. All nodes that lie beyond the distance cutoff will be set to null or a user-specified value (e.g. zero). This can be used to remove low-confidence areas from a model.
! Unlike earlier versions, this tool now computes the true 3D distance between the voxel and the control points, not just the XY location of the borehole.

This program requires that a real number RockWorks solid model already exists. It also requires that you have displayed in the RockWorks datasheet a listing of the X, Y,Z locations for the boreholes from which the solid model was created.

Feature Level: RockWorks Basic and higher

Menu Options
Step-by-Step Summary

Menu Options

• Rules & Filters: Use the buttons at the top of the window to apply filters and rules for this program. (More info)
  • Spatial Filter: Filter the input data to be displayed in striplogs, if activated.
  • Time Filter: Filter any T-Data or Aquifer data in striplogs, if activated.
  • Stratigraphic Rules: Apply stratigraphy rules for Stratigraphy data in striplogs, if activated.
  • 
    
• 3D Log Design
  If you decide to include logs with this diagram ("Striplogs" setting, below), click on this button at the top of the window to set up how you want the 3D logs to look.
  See Visible Item Summary and Using the 3D Log Designer for details.
• 
  

  ---

• Data Columns: Use these prompts to select the input data columns in the datasheet.
  • X (Easting), Y (Northing), Z (Elevation): Select the names of the columns in the current datasheet that contain the X and Y location coordinates and the Z (elevation) for the control points, from which distance is to be computed.
    These can be Eastings in meters or feet, local coordinates, etc. See Defining your Datasheet Coordinates for more information.
  • 
    
• Input/Output Models:
  • Input Model: Click to the right to browse for the name of the existing RockWorks solid model (.RwMod file) that the program is to read and filter.
  • Output Model: Click to the right to type in the name to assign to the new solid model that the program will create, which results from the distance filtering operation.
  • 
    
• Options:
  • Distance Cutoff: Enter here the distance from each control point that you wish to consider "high confidence." This distance is expressed in your X,Y coordinate units. During filtering, all nodes that are further than this distance from a control point will be set to the replacement value defined below.
  • Value to Assign to Nodes Beyond Cutoff Distance: Use these settings to define the value to be assigned to the nodes that fall outside the specified distance cutoff.
    • Null: Click in this option for the program to assign the RockWorks null value (-1e27) to the filtered nodes.
    • Other: Click in this radio button if you want to specify a specific real number value (such as 0) for the filtered nodes. Type the value into the Other Value prompt.
    • 
      
• 3D Solid Diagram
  Insert a check here to display the output solid model as a 3D diagram.
  Click this tab to set up the diagram options.
  
  • Block Diagram
    • Isosurface: Click in the Isosurface radio button to display the solid model as if enclosed in a "skin." This view will be smoother than a voxel display. (More info)
      • Isomesh: Check this box to plot a series of polylines that represent three-dimensional contours at a user-defined cutoff. Click this tab to establish the settings. (More info)
    • Voxels: Click in the Voxels radio button to represent the solid model in the 3D display as color-coded voxels. You can choose to display either the Full Voxel, or just the Midpoint. Display of the midpoint only can significantly improve display time for huge models.
    • 
      
    • Filter: Check this option if you want to restrict the isosurface or voxel display to a specific data range. This does not affect the model, only the display of the model. Enabling this permits you to create an initial display in RockPlot3D that eliminates the need to manually change the display attributes. More importantly, this capability if essential for initially displaying the solid in a pre-filtered state when creating animations and Playlist scripts.
      ! These filter settings can be changed once the diagram is displayed in RockPlot3D.
    • 
      
    • Color Scheme: Choose the color scheme for the block model - automatic, table-based, etc. (More info)
    • 
      
  • Striplogs: Check this item to include 3D logs with the solid model display. Click the 3D Log Design button at the top of the window to set up how you want the logs to look.
    • XYZ Clipping: Check this sub-item if you want to restrict the logs to a particular spatial area. (More info)
    • 
      
  • Other 3D Solid Diagram Options: Use these checkboxes to append other layers to your 3D scene. (Summary)
    
    • Draped Image: Include an image in this 3D scene, draped over an existing grid surface. (More info)
    • Floating Image: Include an image in this 3D scene, floating at a specified elevation. (More info)
    • Perimeter Cage Include a 3D reference cage around the solid diagram. (More info)
    • Legends: Include one or more legends with the diagram.(More info)
    • Infrastructure: Display buildings, pipes, or other infrastructure with your 3D scene. (More info)
    • Faults: Include 3D fault ribbons with this scene. (More info)
    • Other 3D Files: Include other, existing, RockPlot3D ".Rw3D" files in this scene. (More info)
    • 
      
  • Output Options: Use these settings to define whether the output scene is to be saved (or displayed as "untitled"), how the file should be named, and whether it is to be displayed after it is created. It also offers export options. (More info)
  • 
    

Step-by-Step Summary

1. Access the RockWorks Datasheet program tab.
2. Open into the datasheet the listing of the X, Y, and Z coordinates for the solid model control points.
   • If the model was originally created from XYZG data stored in a datasheet, use the Project Manager or File | Open to open this RwDat file.
   • If the model was originally created in the Borehole Manager, use the Borehole Manager's File | Export | datatype | RwDat options to transfer source data from the Borehole Manager to the RockWorks datasheet for use in this program.
3. Select the ModOps | Solid | Filters | Distance Clipping menu option.
4. Enter the requested menu settings, described above.
5. Click the Continue button to proceed.

   RockWorks will load the input solid model file, and will determine which nodes lie within the declared cutoff distance from a control point. (Because the solid model is 3-dimensional, you can picture this cutoff distance to be a cylindrical zone around each control point, extending vertically through the solid model.)

   All nodes that lie within the cutoff from any control point will be passed to the output file unchanged. Any nodes in the source file that do not lie within the cutoff distance from any control point will be re-assigned a G value of "0." The resulting node values will be stored in a new solid model on disk under the output file name you selected. If you have requested a diagram, it will be displayed in a RockPlot3D tab.

6. You can adjust any of the input options via the main Options tab to the left, and then click the Continue button again to regenerate the display.
7. View / save / manipulate / print the image in the RockPlot3D window.
   

See also

• Adding this program to your Playlist
• Adding this program to your Favorites
• Save/load/view menu settings
• 
  

Back to Solid Menu Summary

RockWare home page