Mikala's Maps
Monday, April 15, 2013
DRG map
http://egsc.usgs.gov/isb/pubs/factsheets/fs08801.html
A DRG (Digital Raster Graphic) is a USGS topographic map that has been scanned into a computer. This is a DRG of an area around the Potomac River in Washington DC. It is a DRG because it was a printed topographic map that was then scanned.
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