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- Environmental Systems Research Institute (Redlands, Calif.)11
- United States Geological Survey10
- Economic and Social Research Institute (Reston, Va.)7
- ESRI3
- Tele Atlas North America, Inc.3
- National Atlas of the United States and the United States Geological Survey2
- TomTom North America, Inc.2
- Economic and Social Research Institute1
- Esri1
- Tele Atlas (Firm : U.S.)1
- U.S. Department of Commerce, Census Bureau, Esri1