To Add DEM Files to a Surface

1. In Toolspace, on the Prospector tab, expand the surface Definition collection, right-click , and click Add.
2. In the Add DEM File dialog box, enter the path and name of the DEM file or click and browse to the location of the DEM file.
3. Select the DEM file so that its name is displayed in the File Name field and click Open.

   The DEM file name and information is displayed in the corresponding Add DEM File dialog box fields.

4. Optionally, change the coordinate system of the DEM data. For more information, see To Change the Specified Coordinate System of a DEM File.

   The points of the DEM file are transformed from the specified coordinate system of the DEM file to the coordinate system of the current drawing taking into account any Transformation settings specified in the Drawing Settings dialog box.

   Note: DEM files cannot be transformed for grid surfaces. If you include a DEM file as part of a grid surface definition, its coordinate system must match that of the drawing, or it cannot be added.
5. Click OK to import the DEM file into the surface.

The DEM file is added to the surface DEM Files collection in the Prospector tree.