Base compiled from USGS 1:24 000-scale topographic maps dated 1968-1975, map edited 1978, revised from aerial photographs taken 1975; interpretations derived from soil map constructed 1974.; "Projection and 10 000-meter grid ticks, zone 16: Universal Transverse Mercator."; "25 000-foot grid ticks based on Illinois coordinate system, east zone."; May 1980.; Includes location map.
61 x 41 centimeters
1:100,000