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- Environmental Systems Research Institute (Redlands, Calif.)67
- TomTom North America, Inc.54
- United States. Bureau of Transportation Statistics39
- National Atlas of the United States30
- National Atlas of the United States and the United States Geological Survey27
- Esri26
- Tele Atlas North America, Inc.26
- Geological Survey (U.S.)22
- Tele Atlas B.V.20
- United States Geological Survey19
- Stackhouse, Cecil17
- Economic and Social Research Institute (Reston, Va.)16
- Digital Social Science Centaer, Columbia University Libraries11
- National Climatic Data Center (U.S.)11
- United States. National Environmental Satellite, Data, and Information Service11
- United States. National Oceanic and Atmospheric Administration.11
- National Geophysical Data Center8
- United States. Bureau of the Census. Geography Division7
- ESRI6
- Tele Atlas (Firm : U.S.)5