Free Digital GIS Data
California
- GIS Internet Directories
- Guide to Internet Resource
- Coastline Data
- Connecticut
- Consortium for International Earth Science Information Network (CIESIN)
- Demographics
- ESRI's Datahound
General Data
GIS Links
- GIS Linx
- MyTopLink
- GIS Jumpstation
- GIS List Archives
- Louisiana
- Mississippi
- Missouri
- Montana
- National Geophysical Data Center
- National Spatial Data Clearinghouse
- National Spatial Data Infrastructure
- Oregon
- Pennsylvania
- Rhode Island
- San Diego
- Soils
- South American and Central American Data
- US EPA
- U.S. Fish and Wildlife Service
- Utah
- Wetlands
