Illinois Natural Resources Geospatial Data Clearinghouse Geospatial Data Clearinghouse Home


A gateway to Illinois GIS data sets and orthoimagery.

Access Illinois GIS data sets and documentation (metadata) for ArcIMS Interactive Map Services, USGS digital topographic maps, aerial photography, orthoimagery, orthophotography, geology, land use, natural resources, and infrastructure. Illinois data sets and map data layers are available for download free of charge.


Aerial Photography and Orthophotography
1937 - 1947 Historical Aerial Photographs
1927 Historical Aerial Photographs, Mississippi River
 
2011 Illinois Department of Transportation Orthophotos
2005 Chicago Urban Area Orthophotos
2005 NAPP Digital Orthophoto Quarter Quadrangles
2004 NAIP Digital Orthophoto Quarter Quadrangles
2000 Des Plaines River Watershed Orthophotos
1998 NAPP Digital Orthophoto Quarter Quadrangles
Learn about Digital Orthophotography
USGS Digital Topographic Maps
Digital Raster Graphic Files (DRG) Files
1:24,000, 1:100,000, and 1:250,000
Illinois Map Data Layers
Statewide data: Geology, Elevation, Infrastructure
    County data have become Statewide data
Illinois Geological Quadrangle Data
Illinois Height Modernization Program
Illinois Land Cover Data
Other Data
Illinois GIS Data Providers
What's New?
- Illinois Height Modernization Program
     LiDAR Derivatives: DSM, DTM/DEM data by county
- 2011 Illinois Department of Transportation (IDOT) Orthophotos new
     Download: 2011 IDOT Compressed Orthophoto data by County
 
Software Tools
ArcIMS to GIS, load services directly into GIS software.
DownThemAll tool for Firefox to download .zip files.
Expressview Browser Plugin (MrSID) for Windows to view .sid files.
ArcGIS Server Map Services
1937 - 1947 Historical Aerial Photographs
ISGS Illinois Oil and Gas Resources
ArcIMS Interactive Map Services
2005 Chicago Urban Area Orthoimagery
2005 Illinois Digital Orthophoto Quadrangle Data
1998 Illinois Digital Orthophoto Quadrangle Data
Illinois Base Data, project info
 
ISGS Illinois Natural Gamma-Ray Logs , project info: Gamma-Ray Logs are now located within the ILWATER map interface.
ISGS Illinois Water and Related Wells
     Available for download: ISGS Wells and Borings Points