This site provides free access to Iowa geographic map data through an on-line map viewer, ArcIMS map services, or through GIS software extensions.
1:100,000-scale Digital Line Graph for Iowa
1:250,000-scale Digital Elevation Models for Iowa
All data are georeferenced to UTM Zones 15 and 16 with a DATUM of Nad83.
County and statewide road centerline data
The site provides information about GAP and its partners and checklists of species
Site for viewing and download on this website are digital orthophotoquads (aerial images), color infrared digital orthophotoquads (taken in 2002), shaded relief maps, 1:100,000 and 1:24,000 scale USGS topographic maps, and landcover and GAP landcover maps from 1992 Landsat imagery. This site provides free access to Iowa geographic map data through an on-line map viewer, […]
The Iowa Geographic Information Council acts as a clearinghouse for GIS information in Iowa. The website includes links to several county interactive mapping sites, Iowa data sites, GIS jobs, GIS events calendar, and education, software, and services resources
Online Iowa GIS data. Data sets are sorted and stored by 1:100,000-scale USGS quadrangle tiles.
The Natural Resources Geographic Information System (NRGIS) is the geographic information system (GIS) developed and maintained by the Iowa Department of Natural Resources (DNR). Loads of data available as E00 or sHP coverages.