These image tiles (shown in green) cover approximately 450 square miles of the Des Plaines watershed in southeastern Wisconsin and northeastern Illinois (portions of Racine and Kenosha counties in Wisconsin and Lake, Cook, and Du Page counties in Illinois).

Click on a green square to download an image tile (.zip).

Each .zip file bundle includes <filename>.sid and <filename>.sdw, which are the image file and a georeferencing file; file sizes range from 1.5 Mb to 3.0 Mb.