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Federal
USGS US Topo Map Collection
Department of the Interior —
Layered geospatial PDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography,... -
Federal
Water-level change, High Plains aquifer, 1980 to 1995
Department of the Interior —
This raster data set represents water-level change in the High Plains aquifer of the United States from 1980 to 1995, in feet. The High Plains aquifer underlies 112.6...