Convert the Z units of a grid/DEM file to other linear units

You can convert the Z values of a grid file from one linear unit to another (e.g. from meters to feet) using Surfer's Grid Math function. 

To do this:
  1. Click Grids | Calculate | Math.
  2. In the Grid Math dialog, click the Add Grids... button.
  3. Select the DEM or grid file you wish to convert and click Open. This grid is entered as input grid file (A).
  4. Enter the function with the conversion factor. For converting feet to meters, enter A/3.28083. For converting meters to feet, enter A*3.28083.
  5. Click the Change Filename folder icon to change the file name or file location of the new grid.
  6. Click OK and the new grid file is created.


Updated November, 2021

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