USGS GTOPO30 (*.hdr;*.dem)

This is a binary format file containing point height readings at 30 arc second intervals (approx 1000m).

The expected file extension of this data is *.HDR and *.DEM.

Compatibility:

  • Cadcorp SIS Desktop
  • Cadcorp SIS Desktop Express
  • Cadcorp SIS ActiveX Modeller
  • Cadcorp SIS ActiveX Manager
  • Cadcorp SIS ActiveX Viewer
  • Cadcorp GeognoSIS