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- Environmental Systems Research Institute (Redlands, Calif.)14
- ESRI11
- Economic and Social Research Institute (Reston, Va.)6
- Tele Atlas North America, Inc.6
- TomTom North America, Inc.5
- United States Geological Survey4
- Department of Commerce, Census Bureau, Geography Division2
- Bureau of Transportation Statistics1
- Economic and Social Research Institute1
- Esri1
- National Atlas of the United States and the United States Geological Survey1
- Tele Atlas (Firm : U.S.)1