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Some Background Data Sets for Water Resources
Here are some background data sets commonly used in water-resources studies. They represent only a small subset of USGS data holdings for basemaps. For more information on USGS maps see the USGS mapping pages.
National Coverages
- Benchmark Stations
- City Locations
- Climate Divisions
- Counties in the conterminous U.S.: 1:2,000,000 or 1:100,000
- Districts for 104th Congress
- Ecoregions
- Hydrologic Cataloging Units: 1:2,000,000 or 1:250,000
- Land Use
- Major Land Resource Areas (MLRA)
- Physiographic provences
- Reservoirs
- States, 1:2,000,000
- Streams, 1:2,000,000
- U.S. Population points: 1980 or 1990
- Soils
National Water Quality Assessment (NAWQA) Program Coverages
Selected Regional and Local Data Sets
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Watershed Boundaries and Digital Elevation Model of Oklahoma Derived from 1:100,000-scale Digital Topographic Maps (This information no longer available from this site)
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