Web Resources
South Dakota Resources
Mapping, GIS, GPS
- David Rumsey Map Collection
- Geographic Names Information System
- Geospatial Data Gateway
- FIPS Code Lookup
- Historical Air Photos
- Iowa Geographic Image Map Server
- Map Collections from Library of Congress
- Missouri River Paleochannel Mapping
- Shaded Relief Maps
- University of Texas Map Collection
- USDA Web Soil Survey
- USGS Historical Topographic Map Explorer
- USGS LandsatLook Viewer
- USGS National Geologic Lexicon Database
- USGS National Map
- USGS Maps, Imagery, Publications
- USGS Mineral Resources Data System