Key to Map Symbols for

1:250,000 Digital Raster Graphic

Populated Places
Roads
Railroads, boundaries
Airports
Other features
These are some of the symbols found on 1:250,000 Digital Raster Graphics (DRG), which are scanned images of U.S. Geological Survey (USGS) standard series topographic map.

Populated places

Roads, Boundaries

Railroads

Other Man-Made Features

Other Features

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Last updated Wednesday, 28-Jul-2004 11:15:00 EDT
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