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
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- 2005 Chicago Urban Area Orthoimagery
- 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
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- What's New?
- - 2011 Orthoimagery status update
- - Illinois Height Modernization Program
- 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 (beta)
- ISGS Illinois Oil and Gas Resources (beta)
- ArcIMS Interactive Map Services
- 2005 Chicago Urban Area Orthoimagery
- 2005 Illinois Digital Orthophoto Quadrangle Data
- 1998 Illinois Digital Orthophoto Quadrangle Data
- 1937-1947 Illinois Historical Aerial Photography
- Illinois Base Data, project info
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- ISGS Illinois Natural Gamma-Ray Logs , project info
- ISGS Illinois Oil and Gas Resources, project info
- ISGS Illinois Water and Related Wells, project info
- Available for download: ISGS Wells and Borings Points
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