- Colton, J. H. (Joseph Hutchins), 1800-18933
- Conrad, J. E. (Julian Eduard)3
- Contra Costa County3
- County of Sonoma GIS Central3
- County of Sonoma ISD GIS Central3
- DPT3
- Danmarks og Grønlands geologiske undersøgelse3
- Delarochette, L. (Louis), 1731-18023
- Department of Information Technology, Solano County 3
- Department of Telecommunications and Information Services3
- ESRI3
- Geological Survey of Kenya3
- Gherdevich, Davide3
- Godt, Jonathan W.3
- Holland, Ph.D., Robert F.3
- Humboldt County Community Development Services3
- J. & C. Walker (Firm)3
- Johnston, Alexander Keith, 1804-18713
- Lallau, Étienne3
- Lynsey Wickman - County of Napa Conservation, Development Planning Department3
