Iowa

Geographic information systems

Iowa Geographic Information Council::http://www.iowagic.org/

Iowa Geospatial Data Clearinghouse::http://maps.gis.iastate.edu/clearinghouse
Historical geography - Maps

Iowa DOT Photos Portal::http://historicalphotos.iowadot.gov/AllCollections_Home.aspx

Alexandria Digital Library: United States

Last modified on 2008-09-08