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- Environmental Systems Research Institute (Redlands, Calif.)[remove]32
- Tele Atlas B.V.9
- United States Geological Survey8
- TomTom North America, Inc.5
- National Atlas of the United States and the United States Geological Survey3
- Tele Atlas North America, Inc.3
- Tele Atlas (Firm : U.S.)2
- ESRI1
- Smithsonian Institution, Global Volcanism Program, National Atlas of the United States, and the United States Geological Survey1
- TomTom International (Firm)1
- U.S. Department of Commerce, Census Bureau, Esri1