USGS Digital Elevation Model (1 degree) (*.dem)
This dataset is often referred to as 3 second arc or 1:250,000 scale USGS DEM data. The data 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