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You searched for: Genre Aerial imagery Remove constraint Genre: Aerial imagery Time Period 1950-1999 Remove constraint Time Period: 1950-1999
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1. Aerial Imagery: Cook County, Illinois, 1998

1998. Cook_County_GIS. Panchromatic aerial imagery flown in 1998 for Cook County, Illinois at 6 inch pixel resolution.To download, let your browser load blocked content. ...

17. Buried Bedrock Surface: Illinois, 2004

1994. Herzog, B.L.. B.J. Stiff, C.A. Chenoweth, K.L. Warner, J.B. Sievering, C. Avery. The Buried Bedrock Surface of Illinois map represents the first revision of the bedrock topography map since the second edition was published by th...

19. County Boundaries: Illinois, 2003

1968-1979. Illinois State Geological Survey. This data set contains Illinois county boundaries in line and polygon formats. The polygon attribute data include county name and number (FIPS) des...