Data archive for spatial pattern analysis
- AI-GEOSTATS: A European Union Directorate General web service for geostatistical and spatial statistics
- Census Bureau Factfinder: Free decennial census population and social characteristics data
- Center for International Earth Science Information Network (CIESIN): Clearinghouse for environmental data, metadata, and data tools
- Digital Chart of the World Server (Penn State): International boundary files
- Geography Network: Clearinghouse for free and fee-based geographic data
- GeoStat: Geospatial and Statistical Data Center at the University of Virginia
- GIA Core at Penn State's Population Research Institute: houses an array of geospatial data holdings on international and US topics
- National Historical Geographic Information System: NHGIS is a project to create and freely disseminate databases incorporating all available aggregate census information for the United States between 1790 and 2000 in a format for GIS processing
- Social Explorer: Produce and visualize interactive maps using US Census data for different geographic units from 1870 to 2000
- SAL Data: Sample data for teaching and research with GeoDa from the Spatial Analysis Lab at the University of Illinois
- USGS National Geospatial Data Clearinghouse: Geospatial data from the US Geological Survey