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- Environmental Systems Research Institute (Redlands, Calif.)16
- TomTom North America, Inc.6
- Michael Bauer Research GmbH4
- DeLorme Publishing Company, Inc.2
- Economic and Social Research Institute (Reston, Va.)2
- Esri2
- National Atlas of the United States and the United States Geological Survey2
- U.S. Census Bureau, Geography Division2
- U.S. Department of Commerce, Census Bureau, Esri2
- Department of Commerce, Census Bureau, Geography Division1
- Environmental Systems Research Institute (Redlands, Calif.)i1