Iowa's public geospatial data is housed by a number of entities within the State. Below is a list of links to the key data resources within the State.

Iowa Geographic Map Server

This site provides free access to Iowa geographic map data through online map viewers and web map services. The site was developed by the Iowa State University Geographic Information Systems Support and Research Facility in cooperation with the Iowa Department of Natural Resources, the USDA Natural Resources Conservation Service, and the Massachusetts Institute of Technology.

State of Iowa Open Geospatial Data

A wide variety of data available for download or streaming.  The NRGIS Library data lives here. The Library's data has been merged into Iowa Geodata, the State's clearinghouse of geospatial data. This is a collaborative space for users and publishers of geospatial data about Iowa.

UNI Geotree

The GeoInformatics Training Research Education and Extension (GeoTREE) Center is located within the Geography Department at the University of Northern Iowa and the purpose of the Center is to support the effective use of geospatial (Geographic Information Systems, Global Positioning Systems, Remote Sensing, Web mapping) technologies at the University of Northern Iowa (UNI) and in the state of Iowa.

Iowa GIS Data Repository is developed and sponsored by the Iowa Counties Information Technology Association. was created to provide a secure method for counties, as well as other agencies, to share GIS data for emergency management and other purposes. It is designed to be a powerful tool for local government agencies to share critical GIS data.

Iowa DOT Geospatial Technologies

Geospatial technologies and information at Iowa DOT encompasses many disciplines, from linear referencing to remote sensing. Iowa DOT uses Oracle Spatial to store most geospatial data. Using database central software neutral approach Iowa DOT has the flexibility in development of geospatial systems. Iowa DOT leverages other software vendor's technologies; Intergraph GeoMedia, ArcGIS Server, Quick Terrain Modeler, Geocortex Essentials to name a few.

State Data Center of Iowa

The State Data Center of Iowa is your source for population, housing, business and government statistics about Iowa, including data from the U.S. Census Bureau, Iowa state agencies, and other state and federal sources.