Create planar terrain slope grid in Surfer

The Terrain Slope option of the Data Metrics gridding method calculates the local slope using the specified search parameters. The default search for small data sets is no search, so each node is assigned the same average slope value. Reduce the search radii for more meaningful results and variation in the slope.

 

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See the steps below:

  1. Click Home | Grid Data | Grid Data, select a data file and then click Open.
  2. In the Grid Data - Select Data dialog,
    1. Choose Data Metrics from the Gridding Method list on the left.
    2. Choose your data file from the Dataset 1 list or by clicking Browse, choosing the file, and clicking Open.
    3. Set your X, Y, and Z data columns.
    4. Click Next.
  3. In the Grid Data - Data Metrics - Options dialog,
    1. In the Data Metrics Parameters section on the right, change the Metric to interpolate to Terrain Slope.
  4. In the Search Neighborhood section, uncheck the None (use all data) and specify Radius 1 and Radius 2 values in the Search Ellipse sub-section.
  5. Click Skip to End
  6. Click Finish to produce the grid with the specified options.

 


To do this in Surfer 16 or earlier:

  1. Click Home | Grid Data | Grid Data, select a data file and then click Open.
  2. In the Grid Data dialog, choose Data Metrics as the Gridding Method.
  3. Click the Advanced Options button to display the Data Metrics Advanced Options dialog.
  4. In the Grid Data AdvancedOptions dialog, change Metric to interpolate to Terrain Slope.
  5. Under Search Neighborhood, uncheck the None (use all data) and specify Radius 1 and Radius 2 values.
  6. Click OK in the Data Metrics Advanced Options dialog to return to the Grid Data dialog.
  7. Click OK in the Grid Data dialog, and a grid file is produced using the Data Metrics gridding method with the specified options.

 

Updated October 2021

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