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- LeadDog Consulting, LLC11
- CommunityCartography5
- Economic and Social Research Institute5
- Tele Atlas (Firm : U.S.)5
- CHGIS, Harvard Yenching Institute2
- Community Cartography2
- ESRI1
- Environmental Systems Research Institute (Redlands, Calif.)1
- Halcrow Group Limited1
- Sistemas de Información Geográfica, S.A. de C.V.1
- Tele Atlas North America, Inc.1
- U.S. Geological Survey1