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1. U.S. Census Urbanized Areas, 2013

2010. U.S. Department of Commerce, Census Bureau, Geography Division. U.S. Census Urbanized Areas represents the 2010 Census urban areas in the United States. An urban area comprises a densely settled core of census t...

2. U.S. ZIP Code Areas (Five-Digit)

2010. Environmental Systems Research Institute (Redlands, Calif.) and TomTom North America, Inc. This polygon shapefile represents five-digit ZIP Code areas used by the U.S. Postal Service to deliver mail more effectively. The first digit of a ... Environmental Systems Research Institute (Redlands, Calif.).