Digital Base Data
Please read the Digital Base Data Disclaimer before using any of this data
These data sets are best used with GIS Software. However, links to stand-alone viewers can be found at the bottom of this page.
Questions about data on this site can be sent to Tim Cowman.
Select a Data Type


Free viewers for the Digital Base Data
- GeoViewer by LizardTech
- Global Mapper by Blue Marble Geographics