Maps & Geography

Stanford University Libraries' suggested resources for general GIS data, including links to data clearinghouses, state and international data, imagery, and more.

The official U.S. government site for spatial data, a subdivision of Data.Gov, whose mission is to increase the ability of the public to easily find, download, and use datasets that are generated and held by the Federal Government. The site includes machine-readable U.S. spatial data for a wide range of disciplines.

This directory from the U.S. Army Corps of Engineers Topographic Engineering Center provides links to sources of software, data, publications, services, and more.

The University of Arkasas Libraries' guide to mostly online and mostly free U.S. geospatial and attribute data.