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- Environmental Systems Research Institute (Redlands, Calif.)40
- Esri29
- TomTom North America, Inc.21
- Michael Bauer Research GmbH8
- U.S. Department of Commerce, Census Bureau8
- National Atlas of the United States and the United States Geological Survey5
- DeLorme Publishing Company, Inc.4
- World Wildlife Fund4
- Garmin International, Inc.3
- U.S. Census Bureau, Geography Division3
- U.S. Department of Commerce, Census Bureau, Esri2
- U.S. Geological Survey in cooperation with U.S. Environmental Protection Agency2
- Department of Commerce, Census Bureau, Geography Division1
- Economic and Social Research Institute (Reston, Va.)1
- Environmental Systems Research Institute (Redlands, Calif.)i1
- National Atlas of the United States1
- National Park Service1
- U.S. Department of Commerce, Census Bureau, Geography Division1
- United States Geological Survey1