Data Resources for GIS

Global Sources

  • WorldGrids.org (public repository of environmental layers; ISRIC)
  • Natural Earth (base map data for small cartographic scale maps)
  • CGIAR-CSI (global data for elevation (SRTM), climate, etc.)
United Nations

National Sources

USGS
USDA
Other U.S. Federal Government Agencies

State Sources

Data Clearinghouses