USGS SDTS DEM (*.ddf)

SDTS is a spatial data transfer standard for the dissemination of both vector and raster DEM data from the USGS.

The expected extension is *.DDF.

Compatibility:

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