Government Collections and Projects

• NSDI Geospatial One-Stop:Geodata.gov
• GeoCommunity: GIS Data Depot
• U.S. Census Bureau: Geography (including TIGER/Line files)
• USGS: Geographic Data Download, Earth Resources Observation and Science, National Map
• National Atlas: Raw Data Download
• National Renewable Energy Laboratory: Dynamic Maps, GIS Data, & Analysis Tools
• National Wetlands Inventory: Wetlands Digital Data
• NOAA: Coral Reef Information System: Data(requires login). Alternate site
• NOAA: National Geophysical Data Center: Types of Data Available
• NRCS: Soil Data Mart
• USDA: Natural Resources Conservation Service: GIS and Data Sites

Academic Collections & Projects

• Australian Consortium for the Asian Spatial Information and Analysis Network: ACASIAN
• Columbia University: CIESIN
• Edinburgh University: Map and Data Place
• Stanford University: Websites for Digital GIS Data
• North Carolina State University: Geospatial Data Services
• University of Arkansas Libraries: U.S. State and Local, International
• University of Virginia: Geospatial & Statistical Data Center
  

Commercial Sector Collections & Projects

• webGIS: webGIS
• National Geographic: Topo! Interactive Maps