The companion raster dataset GISDB.IL_HISTORICAL_AERIAL_UTM16_RAS contains additional coverage of the Chicago and St. Louis metropolitan areas within Illinois and UTM zone 16.
On May 12, 1933, President Franklin Roosevelt signed into law the Agricultural Adjustment Act, which was originally administered by the USDA-AAA. Since the mid-1930s, the USDA-AAA, now the USDA Farm Services Agency (USDA-FSA), periodically acquired nationwide aerial photographs by county. These aerial photographs were originally used by the USDA-AAA to assess the nation's agricultural lands and served as the basis for the national soil surveys.
Statewide coverage of USDA-AAA aerial photographs was first achieved for Illinois from 1936 through 1941. Approximately 27,000 individual frames were acquired for complete coverage of the state.
Because of deterioration and stability issues, the original 7-inch by 9-inch and 9-inch by 9-inch nitrocellulose (silver nitrate) negatives were destroyed at the National Archives in the 1980s. The United States Navy and the National Archives made small-format copies of the negatives prior to the destruction of the original negatives. These copies, and the photographic prints made from them, are of extremely poor quality. Therefore, photographic paper prints made from the original large-format negatives are the best remaining representation of this aerial photography collection.
Nearly complete photographic paper print collections for Illinois exist at the Illinois Department of Natural Resources Office of Water Resources (IDNR OWR) and the University of Illinois at Urbana Champaign (UIUC) Map and Geography Library. Smaller regional print collections are also located at many Illinois libraries and governmental agencies. None of the collections are complete, however, and only limited preservation efforts are in place to ensure the permanence of these print collections.
Links to these are provided in the Cross References section.
Individuals or entities may make fair use of copyrighted ISGS material, such as reproducing a single figure or table, or using a brief text quotation, without obtaining formal permission, but in all cases the Illinois State Geological Survey must be credited as the source of the material. To reproduce ISGS information beyond the fair use standard, permission must be obtained from the ISGS Information Office, 615 East Peabody Drive, Champaign, Illinois 61820, 217-333-4747, firstname.lastname@example.org. License fees and a license agreement may be required, depending on the proposed usage.
Map information is to be used at a scientifically and cartographically appropriate scale, that is, at a scale no greater than indicated on the map or as described in the documentation of the map or map data. Map information is not appropriate for, and is not to be used as, a geodetic, legal, or engineering base. Map information has no legal basis in the definition of boundaries or property lines and is not intended as a substitute for surveyed locations such as can be determined by a registered Public Land Surveyor.
The data do not replace the need for detailed site-specific studies.
Funding source: Illinois Department of Transportation (IDOT) Funding source: Illinois Department of Natural Resources (IDNR) Funding source: IDNR Office of Water Resources (IDNR OWR) Funding source: United States Army Corps of Engineers (USACE) Funding source: Illinois State Geological Survey (ISGS)
The orthorectification process for the historical photos had RMSEs less than 7 meters.
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Illinois Natural Resources Geospatial Data ClearinghouseGenerated by mp version 2.8.25 on Wed Apr 08 14:16:22 2009