Geospatial Data & GIS Services  Tags: geospatial_data gis data_services gis_data  

• Cartographic Boundary Files (2000, Down to block broup level)
  
• NHGIS Historical Census Data (1790-2000 & Boundary Files)
• Social Explorer (1940-2000 Census data and maps)
• Arizon Electronic Atlas (1870-1970 Arizona Historic Census Database)

For more Statistics sources, please see the Database Portal section Statistics & Polls.

• American Factfinder (1990, 2000 US Census, American Community Survey, Economic Census, etc)

By Place

• U.S.-Geodata.gov (Geospatial one stop for federal, state, local agencies data)
• U.S.-By State (U. of Arkansas)
• U.S.-USGS Products: DEM, DRG, DOQQs, Land Cover (USGS National seemless Map)
• U.S.-National Aggregates (U. of Arkansas)

• Local-VA Geospatial Data (UVA)
• Local-VA Local GIS Agency Sites (GMU)
  
• See Also Libraries' Data Collection
  

• International-Boundary Files (Digital Charts of the World); BioGeomancer (via UC-Berkeley)
• International-SRTM data (90 meters)
  
• International-By Country or Region (U. of Arkansas)
• International-USGS products: DRG,DOQQ, DEMs, Landcover (USGS National Seamless Server)
• International-Remote Sensing Data (Global Land Cover Facility via U. of MD)

By Type

• Commerial-Geography Network (ESRI's Data and Map Collection)
  
• Commercial-GIS Data Depot (DRG, DEM, DOQQs, and more)

By Specific topics

•  Coral Reef Database

• Data Web Sites via Delicious (Carleton)
  

3.75 minutes DOQ (Washington D.C.) From USGS Image Gallery.