Creator
- California. Farmland Mapping and Monitoring Program46
- International Association of Seismology and Physics of the Earth's Interior37
- International Heat Flow Commission37
- Oklahoma State University. Department of Geography. Cartography Service37
- Geological Survey (U.S.)23
- California. Department of Fish and Game. Marine Resources Region16
- California. Department of Fish and Game14
- Environmental Systems Research Institute (Redlands, Calif.)12
- Instituto Nacional de Estadística, Geografía e Informática (Mexico)10
- National Atlas of the United States10
- Canada Centre for Remote Sensing8
- Community Development Agency, County of Marin, California8
- California. Department of Water Resources7
- Nature Conservancy (U.S.)7
- Fire and Resource Assessment Program (Calif.)5
- California Geological Survey4
- Stephen P. Teale Data Center (Calif.).4
- United States. Department of Housing and Urban Development4
- California. Department of Conservation3
- County of San Mateo Information Services Department3