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- Geographic Data Technology, Inc. (GDT)160
- Environmental Systems Research Institute, Inc. (ESRI)55
- TomTom North America, Inc.22
- Esri20
- Environmental Systems Research Institute (Redlands, Calif.)13
- U.S. Department of Commerce, Census Bureau11
- United States Geological Survey8
- U.S. Census Bureau5
- Tele Atlas (Firm : U.S.)3
- Tele Atlas North America, Inc.2
- U.S. Census Bureau, Geography Division2
- U.S. Department of Commerce, Census Bureau, Geography Division2
- Department of Commerce, Census Bureau, Geography Division1
- Health Forum, L.L.C.1
- National Atlas of the United States and the United States Geological Survey1
- U.S. Department of Commerce, Census Bureau, Esri1