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1. County Boundaries with Politicial Limit: United States and Territories, 2014

2014. United States. Bureau of Transportation Statistics. This polygon shapefile contains United States county boundaries with political limits extracted from the U.S. Census Bureau's MAF/TIGER Database (M... United States. Bureau of Transportation Statistics.

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

2014. Environmental Systems Research Institute (Redlands, Calif.) and TomTom North America, Inc. This polygon shapefile represents boundaries with the first three digits of a ZIP Code. The first digit of a five-digit ZIP Code divides the United... Environmental Systems Research Institute (Redlands, Calif.).

3. U.S. ZIP Code Points

2014. Environmental Systems Research Institute (Redlands, Calif.) and TomTom North America, Inc. This polygon shapefile represents the five-digit U.S. ZIP Code areas as points, plus all ZIP Codes that have no associated area such as a building.... Environmental Systems Research Institute (Redlands, Calif.).