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Author
- DMTI Spatial Inc.56
- Platts49
- Environmental Systems Research Institute (Redlands, Calif.)48
- Tele Atlas B.V.28
- ESRI17
- Tele Atlas (Firm : U.S.)16
- Economic and Social Research Institute15
- Geological Survey (U.S.)10
- International Steering Committee for Global Mapping (ISCGM)10
- National Geophysical Data Center10
- Tele Atlas North America, Inc.9
- Environmental Systems Research Institute, Inc. (ESRI)8
- Instituto Nacional de Estadística, Geografía e Informática (Mexico)8
- Canada Centre for Remote Sensing7
- Geological Survey of Canada.7
- Central Intelligence Agency6
- Anville, Jean Baptiste Bourguignon d', 1697-17824
- Geographical Survey Institute4
- Hijmans, Robert J.4
- Kelso, Nathaniel Vaughn4