Spatial Data Sources
- USGS : U.S.Geological Survey
- Geospatial Data One-Stop
- Geodata Explorer
- National Mapping Information
- FGDC : Federal Geographic Data Committee
- SDTS : Spatial Data Transfer Standard
- NGDC : National Geospatial Data Clearinghouse
- GLIS : Global Land Infomation System
- 1:100,000-Scale Digital Line Graphs
- 1:200,000-Scale Digital Line Graphs
- 30 Arc-Sec. DCW Digital Elevation Models
- 5 Minute Gridded Earth Topography Data
- Conterminous U.S. AVHRR
- MultiSpectral Scanner Landsat Data
- Space Shuttle Earth Observation Program
- Thematic Mapper Landsat Data
- USGS Land Use and Land Cover Data
- EDC : EROS Data Center
- Publications and Data Products
- U.S. GeoData FTP file access – DEM, DLG, LULC
- CENSUS BUREAU
- NOAA : National Oceanic and Atmospheric Administration
- EPA : Environmental Protection Agency
- NASA
- Ames Research Center
- Earth Observing System Program
- JPL Data Distribution Laboratory
- JPL Imaging Radar Home Page
- JPL Physical Oceanography Distributed Active Archive Center
- Landsat Program
- Lidar Application Group
- Marshall Space Flight Center Hydrologic Cycle DAAC
- Public Use of Remote Sensing Data (RSD) Program
- The Center for Advanced Spatial Technologies (CAST) – Univ. of Arkansas
- NCAR : National Center for Atmospheric Research
- United Nations
- UKBORDERS: Digitized Boundary Data of U.K.
- ERIN Spatial Data (Australia)
State Data Sources
- National Spatial Data Clearinghouse
- University of Arkansas Library’s Guide to Geospatial Data
- Alabama Geological Survey
- Alaska Geospatial Data Clearinghouse (AGDC)
- Arizona Geographic Information Council Public Information Site
- Arkansas : Catalog Of Digital Data
- California Geographical Survey
- Colorado Geospatial Data Clearinghouse (CGDC)
- Connecticut : Map and Geographic Information Center (MAGIC – Univ. of Connecticut)
- Deleware Spatial Data Clearinghouse
- Florida Geographic Data Library (FGDL)
- Georgia GIS Data Clearinghouse (GSDI)
- Hawaii Statewide GIS Program
- Idaho Geospatial Data Center
- Illinois Natural Resources Information Network
- Indiana Geological Survey
- Iowa : Department of Natural Resources GIS Library Catalog
- Iowa Geospatial Data Clearinghouse (IGDC)
- Kansas Data Access and Support Center
- Kentucky Geological Survey
- The Louisiana Statewide GIS (ATLAS)
- Maine GIS Data Catalog
- Maryland Canaan Valley Institute GIS Resources
- Massachsetts Geographic Information System
- Michigan, Department of Natural Resources
- Minnessota Geographic Data Clearinghouse
- Mississippi Automated Resource Information System (MARIS)
- Missouri Spatial Data Information Service (MSDIS)
- Montana Natural Resource Information System
- Nebraska Natural Resources Commission
- New Hampshire GRANIT
- New Jersey Geological Survey Digital Geodata Archive
- New Mexico Earth Data Analysis Center
- NYS Clearinghouse for Geographic Data
- Nevada Earth Sciences and Mining Research Information Center
- North Carolina Geographic Data Clearinghouse
- North Dakota State Data Center (NDSDC)
- Ohio Geographically Referenced Information Program (OGRIP)
- Oklahoma Spatial and Environmental Information clearinghouse
- Oregon Geospatial Data Clearinghouse (OGDC)
- Pennsylvania Spatial Data Access (PASDA)
- Rhode Island Geographic Information System
- South Carolina Dept. of Natural Resources GIS Clearinghouse
- South Dakota Geological Survey
- Tennessee Southern Appalachian Data
- Texas Natural Resources Information System Navigator
- Utah : Automated Geographic Reference Center
- Vermont Center for Geographic Information
- Virginia Geospatial and Statistical Data Center
- Washington State Geospatial Clearinghouse
- West Virginia GIS Technical Center
- Wisconsin : Land Information Clearinghouse
- Wisconsin : State Cartographer’s Office
- Wyoming Spatial Data Clearinghouse