Monday, July 23, 2012

DRG



A DRG map, or digital raster graphic map is a scanned image of a United States Geological Survey (USGS) standard series topographic map.  This was a way of converting topographic maps into raster format, and these DRG maps cover nearly the entire United States.  DRGs can be ordered from the USGS for $1 per file, or a scaled-down version can be browsed online.  The map above is a DRG map of a common landmark known in Tallahassee, Lake Ella.  In this DRG map you not only see the lake, but also Raa Middle School (called Raa Jr. High School on the map) and other city parks.

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