Enable/Disable Rows in the Datasheet based on a Polygon

RockWorks | Datasheet | Filter | Polygon

Use this program to filter data from the current datasheet based on the location of the sample inside or outside a selected polygon. The data that meet the filter requirements remain enabled (checked), the data that do not meet the filter requirements will be unchecked (disabled).

! This requires that you have already defined the filtering polygon, stored as a Polygon Table in the project database. It is assumed that the Polygon Table is defined in the coordinate system and units which are specified for the Grid & Model Dimensions.

! If the input coordinates are in a different coordinate system or represent different units than the Output Dimensions, they will be converted in background memory before the filtering operation occurs.

! Only rows which are already enabled (checked) will be processed by this filter. Disabled rows will remain disabled regardless of their data listings.

Menu Options
Step-by-Step Summary

Menu Options

• Data Columns: Click this tab to define the input columns.
  • X (Easting): Select the column in the main datasheet that contains the X or Easting coordinates for the samples to be filtered.
  • Y (Northing): Select the column that contains the Y or Northing coordinates.
• Polygon Table: Click on this item to select the name of the Polygon Table in the current project database to be used to filter your points.
• Filter Type: Select the type of filter to implement.
  • Keep Interior Points (Disable Exterior Points): Choose this option to enable only those points that lie inside the polygon.
  • Keep Exterior Points (Disable Interior Points): Choose this option to enable only those points that lie outside the polygon.
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Step-by-Step Summary

1. Access the RockWorks Datasheet program tab.
2. Open the datasheet to be manipulated.
3. Click on the Filter menu above the datasheet and select the Polygon option.
4. Enter the requested menu items, described above.
5. Click the Continue button to proceed.

The program will read the enabled rows in the datasheet and (if necessary) convert the input coordinate system and units to match the current Grid & Model Dimensions. It will determine those records whose XY coordinates fall inside ("Keep Interior") or outside ("Keep Exterior") the extents of the selected polygon. The records which meet the filter criterion you requested will remain enabled, and those which do not will be disabled.

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