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Publisher
- ESRI262
- Tele Atlas North America, Inc./Geographic Data Technology, Inc.10
- Environmental Systems Research Institute (ESRI)4
- Tele Atlas North America, Inc.4
- United States Geological Survey3
- DMTI Spatial Inc.2
- Environmental Systems Research Institute (Redlands, Calif.)2
- Federal Aviation Administration2
- Global Mapping International2
- Group 1 Software, Inc.1
- International Organization for Standardization1
- U.S. Geological Survey1