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- Environmental Systems Research Institute (Redlands, Calif.)8
- TomTom North America, Inc.4
- National Atlas of the United States and the United States Geological Survey2
- Department of Commerce, Census Bureau, Geography Division1
- Economic and Social Research Institute (Reston, Va.)1
- Environmental Systems Research Institute (Redlands, Calif.)i1
- Esri1
- Michael Bauer Research GmbH1
- U.S. Census Bureau, Geography Division1