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1. U.S. Parks and Protected Land Points, 1:10 million (2012)

2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This point shapefile depicts the locations of 394 authorized Park Service units in the United States only that are over 100,000 acres. The data doe... North American Cartographic Information Society.

2. U.S. ZIP Code Areas (Three-Digit), 2013

2012. TomTom North America, Inc. U.S. ZIP Code Areas (Three-Digit) represents the first three digits of a ZIP Code. The first digit of a five-digit ZIP Code divides the United Stat...

3. U.S. ZIP Code Points, 2013

2012. TomTom North America, Inc. U.S. ZIP Code Points represents the five-digit U.S. ZIP Code areas as points, plus all ZIP Codes that have no associated area. These ZIP Codes that...