Tuesday, November 22, 2011

Digital Raster Graphics (DRG)


DRGs are topographic maps created by the USGS that reveal the surface of nearly all of the United States and are distributed in a digital format after being scanned onto computers. They are highly useful in all fields involving building and development and highly accessable. The one above is a depiction of part of Washington D.C.

http://egsc.usgs.gov/isb/pubs/factsheets/fs08801.html

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