The topo data index
To view all topo data from stewards besides UGRC, search the SGID Index.
USGS Scanned Topographic Maps
Aerial photography
Scanned series of USGS topographic maps, also known as Digital Raster Graphics (DRGs).
Stewards: UGRC & U.S. Geological Survey
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USGS Topographic Map Indices
Polygon GIS data
This dataset contains GIS mapping data representing the tile indices for the 24K, 100K, and 250K USGS scanned topographic maps (DRGs).
Stewards: UGRC & U.S. Geological Survey
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