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1. United States National Atlas Airports, 2010-2012

2010. National Atlas of the United States, Environmental Systems Research Institute (Redlands, Calif.), and Geological Survey (U.S.). This point shapefile represents airports in the United States, Puerto Rico, and U.S. Virgin Islands with airport passenger enplanements of 25 passe... Environmental Systems Research Institute (Redlands, Calif.).

2. USGS 1:24,000 Topographic Quadrangle Series Index, 2010

2010. Environmental Systems Research Institute (Redlands, Calif.) and Geological Survey (U.S.). This polygon shapefile represents the geographic extent of USGS 1:24,000 topographic maps (7.5- by 7.5-minute quadrangles) for the coterminous U.S.... Environmental Systems Research Institute (Redlands, Calif.).

3. Public Land Survey System of the United States, 2010

2010. Geological Survey (U.S.). This polygon shapefile portrays the Public Land Surveys of the United States, including areas of private survey, donation land claims, and land gra... Geological Survey (U.S.).

4. Populated Cities and Towns: Puerto Rico, United States and U.S. Virgin Islands, 2010

2010. Geological Survey (U.S.) and United States. Bureau of Transportation Statistics. This point shapefile depicts cities and towns in the United States, Puerto Rico, and the United States Virgin Islands. A city or town is a place wi... United States. Bureau of Transportation Statistics.