Chicago Office
300 S. Riverside Plaza
Chicago, IL 60605
Phone: 312-353-5431
Apprx. Coords- -87.63813 41.87775
Google and Terraserver do not agree on the address. Google says their office is at 219 S. Dearborn St. I have provided both locations. The coordinates are from the Terraserver site. However, I have provided no map until I can ascertain which is correct.
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Springfield Office
400 West Monroe Street
Springfield, IL 62704
Phone: 217-492-4033
Apprx. Coords- -89.65960 39.80048
Earthsat imagery was too grainy to be useful.