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 DGM File dialog box, enter the path and name of the DGM file or click and browse to the location of the DGM file.
3. Select the DGM file so that its name is displayed in the File Name field and click Open.

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

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

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

   Note: DGM files cannot be transformed for grid surfaces. If you include a DGM 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 DGM file into the surface.

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