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- Great Britain. Ordnance Survey378
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- Environmental Systems Research Institute, Inc. (ESRI)109
- U.S. Census Bureau. Geography Division96
- United States. Department of Housing and Urban Development47
- University of Arizona32
- Esri19
- Environmental Systems Research Institute (Redlands, Calif.)17
- LeadDog Consulting (Firm)14
- County of Santa Cruz Information Services Department11
- Monterey County (Calif.)8
- Asian Spatial Information and Analysis Network (Australia). Australian Centre.7
- United States. Bureau of Transportation Statistics7
- University of Michigan. China Data Center7
- California. Metropolitan Transportation Commission6
- North American Cartographic Information Society6
- Sacramento County GIS6
- Bay Area Open Space Council5
- Beijing Hua tong ren shi chang xin xi you xian ze ren gong si5
- Oak Ridge National Laboratory5