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 memory based dataset.

Compatibility:

• Cadcorp SIS Map Modeller
• Cadcorp SIS Map Editor
• Cadcorp SIS Map Manager
• Cadcorp SIS Map Express
• Cadcorp SIS ActiveX Modeller
• Cadcorp SIS ActiveX Manager
• Cadcorp SIS ActiveX Viewer
• Cadcorp GeognoSIS

See full list of Dataset Formats

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