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