USGS Optional ASCII DEM (*.dem)
This is the original United States Geological Survey DEM format. Currently only 1 degree/250,000 scale products are left being supplied in this format. This is an ASCII based raster format containing elevation data.
The expected extension is *.DEM.
This is a memory-based dataset.
Compatibility:
- Cadcorp SIS Desktop
- Cadcorp SIS Desktop Express
- Cadcorp SIS ActiveX Modeller
- Cadcorp SIS ActiveX Manager
- Cadcorp SIS ActiveX Viewer
- Cadcorp GeognoSIS