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- Environmental Systems Research Institute (Redlands, Calif.)52
- Esri52
- TomTom North America, Inc.36
- United States Geological Survey19
- National Atlas of the United States and the United States Geological Survey13
- U.S. Department of Commerce, Census Bureau10
- Bureau of Transportation Statistics4
- U.S. Department of Commerce, Census Bureau, Esri4
- U.S. Geological Survey in cooperation with U.S. Environmental Protection Agency3
- Economic and Social Research Institute (Reston, Va.)2
- Federal Railroad Administration (FRA)2
- National Atlas of the United States2
- U.S. Census Bureau, Geography Division2
- Department of Commerce, Census Bureau, Geography Division1
- National Park Service1
- Smithsonian Institution, Global Volcanism Program, National Atlas of the United States, and the United States Geological Survey1
- U.S. Department of Commerce, Census Bureau, Geography Division1