Links to GIS Data Sources
- ABAG GIS Data (Association of Bay Area Governments)
- Bay Area Automated Mapping Association (BAAMA)
- SSU Library - North Bay Digital Maps
- Bay Area Census
- Lake County GIS
- Marin County GIS
- Metropolitan Transportation Commission (MTC)
- Napa County GIS
- NOAA San Francisco Bay Area, California, Land Cover Change
- San Francisco County GIS
- Sonoma County GIS
- San Francisco Bay Area Regional Database
- San Francisco Bay Area Conservation Commons
- San Francisco Enterprise GIS (SFGIS)
- U.C. Berkeley GIS Center datasets
- California Agricultural Statistics Service
- California Bureau of Land Management Geospatial Data Downloads
- California Criminal Justice Statistics Center
- California Dept. of Forestry and Fire Prevention FTP Site
- California Dept. of Finance Demographic Research Unit
- California Dept. of Health Services - Vital Statistics
- California DLRP Farmland Mapping and Monitoring Program
- California Dept. of Fish & Game - Biogeographic Data Analysis Branch
- California Dept. of Water Resources - Land and Water Use
- California Environmental Resource Evaluation System (CERES)
- California Fire and Resource Assessment Program (FRAP)
- California Gap Analysis Project
- California Geographic Survey (CSU-Northridge)
- California Rivers Assessment (CARA)
- California Spatial Information Library (CaSIL)
- CalTrans Office of GIS
- CSU-Northridge Cartographic Resources
- EPICenter - California Injury Data On-line
- USFWS California Spatial Data Sets
- Federal Geographic Data Committee (FGDC)
- FEMA Mapping and Analysis Center
- Geo.data.gov
- Libre Map Project
- National Atlas
- NOAA National Ocean Service Data Explorer
- U.S. Census Bureau Geography
- USDA Geospatial Data Gateway
- USDA Natural Resouces Conservation Service (NRCS)
- USGS EROS Data Center
- USGS Geo-Data Explorer (Geode)
- USGS Seamless Data Distribution System
- USGS Water resources
- USGS National Geospatial Program Office
- USGS/NASA Land Proc. Distributed Active Archive Center (LP DAAC)
- USGS Global Visualization Viewer (Glovis)
- USGS TerraLook (Free global imagery)
- USGS Vegetation Mapping Program (National Park Service)
- U.S. Environmental Protection Agency (EPA)
- USFS Pacific Southwest Region GIS Clearinghouse
- USFWS National Wetlands Inventory
- U.S. Minerals Management Service Mapping
- U.S. National Park Service - National Historic Trails Data
- U.S. National Geodetic Survey, NOAA Shoreline Data Explorer
- Alabama Geological Survey
- Alaska State Geospatial Data Clearinghouse
- Arizona Geographic Information Council
- Arkansas GIS Gateway
- California Spatial Information Library
- University of Colorado Map Library
- University of Connecticut Map & Geographic Info Center
- Connecticut Dept of Environmental Protection
- Delaware DataMIL
- Florida Geographic Data Library
- Georgia GIS Data Clearinghouse
- Hawaii Statewide GIS Program
- INSIDE Idaho
- Illinois Natural Resources Data Clearinghouse
- Indiana GIS Initiative
- Iowa Geospatial Data Clearinghouse
- Iowa Dept. of Natural Resources
- Kansas Geospatial Community Commons
- Kentucky Office of GIS
- Louisiana MAP
- Maine Office of GIS
- Maryland State Geographic Information Committee
- Massachusetts Geographic Information System
- Michigan Center for Geographic Information
- Minnesota Land Management Information Center
- Mississippi Automated Resource Information System (MARIS)
- Missouri Spatial Data Information Service
- Montana State Library GIS Program
- Nebraska GIS Steering Committee
- Nevada Geographic Information Clearinghouse
- New Hampshire GRANIT net
- New Jersey Geographic Information Network
- New Mexico GIS Resources
- New York State Library GIS Clearinghouse
- North Carolina Center for Geographic Information & Analysis
- North Dakota Geographic Information Systems
- Ohio Geographically Referenced Information Program
- Oklahoma State GIS Council
- Oregon Geospatial Enterprise Office
- Pennsylvania Spatial Data Access
- Rhode Island GIS Data
- South Carolina: USC Data Server
- South Dakota Geological Survey
- South Dakota GIS
- Tennessee GISource
- Texas Natural Resource Information System GIS Data Catalog
- Utah Automated Geographic Reference Center
- Vermont Center for Geographic Information
- Virginia Digital Map Library
- Washington Geographic Information Council
- West Virginia GIS Data Clearinghouse
- Wisconsin Land Information Clearinghouse
- Wyoming GIS Resources
- Conservation GeoPortal
- EarthTrends (World Resources Institute)
- Famine Early Warning Systems Network
- Geocommunity Data Depot
- Geography Network
- GISuser Data Catalog
- Global Land Cover Facility (GLCF - U. of Maryland)
- Global Map Aid
- Socioeconomic Data and Applications Data Center (SEDAC)
- TerraServer (Online Imagery Resource)
- UNEP/GRID - Arendal
- VEGETATION sensor products