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Author
- Army Map Service105
- Central Intelligence Agency81
- International Steering Committee for Global Mapping38
- Beijing Hua tong ren shi chang xin xi you xian ze ren gong si30
- University of Michigan. China Data Center30
- United States. Bureau of the Census. Geography Division15
- California. Department of Transportation10
- GIS Lab, Newman Library, Baruch CUNY6
- Thomas, William G., 1964-6
- Mayer, Harold M (Harold Melvin),1916-19944
- National Atlas of the United States4
- United States. Bureau of Transportation Statistics4
- Hunt, Raquel3
- LeadDog Consulting (Firm)3
- National Imagery and Mapping Agency.3
- Sacramento County GIS3
- Bureau of Transportation Statistics2
- Environmental Resources Research Institute2
- Environmental Systems Research Institute (Redlands, Calif.)2
- Indiana Department of Transportation, Business Information and Technology Systems, GIS Mapping2