DEM (China Standard)
Select File | Import | DEM to import Digital Elevation Model (DEM) files.
Enter the following parameters in the Import DEM form:
DEM file
Navigate to the location of the .DEM file(s) you want to import.
Sampling factor
DEM files are often large in size. To ease the import process, it may be necessary to specify a sampling factor in order to extract a subsample of features while maintaining a regular grid pattern of points.
A sampling factor of 5, for example, would mean that every fifth point in the input file is imported. In the case of a 500 by 500 point grid, the resulting input file would be a 100 by 100 grid of points.
Output file
Specify an output file. The type of file you select should be compatible with the type of features being imported.