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- Geographic Data Technology, Inc. (GDT)297
- Environmental Systems Research Institute (Redlands, Calif.)137
- United States. Bureau of Transportation Statistics103
- Environmental Systems Research Institute, Inc. (ESRI)97
- ESRI94
- Hart Energy Publishing75
- United States Geological Survey75
- United States. Department of Housing and Urban Development66
- Platts65
- TomTom North America, Inc.60
- National Atlas of the United States and the United States Geological Survey59
- National Atlas of the United States57
- Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)55
- Tele Atlas North America, Inc.53
- Esri52
- Geological Survey (U.S.)51
- Bureau of Transportation Statistics32
- TTG, Inc.32
- Economic and Social Research Institute (Reston, Va.)28
- Tele Atlas B.V.28