USGS DLG-3 Optional format (ASCII) (*.do;*.opt)

The USGS Digital Line Graph file format contains vector data derived from other USGS raster products at many different scales. 

The expected file extensions include *.DO *.OPT.

This is a memoy-based dataset.

Compatibility:

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