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1. United States Major Parks, 2012

1992. National Park Service, Environmental Systems Research Institute (Redlands, Calif.), and TomTom North America, Inc. United States Major Parks is a polygon theme representing National Parks, National Forests, State and local parks and forests within the United Sta... Esri.

2. United States Summits, 2012

1981. United States Geological Survey and Environmental Systems Research Institute (Redlands, Calif.). United States Summits is a point theme representing summits throughout the United States. Esri.