Scale 1:24,000 ; Polyconic projection (W 87°31ʹ30ʺ--W 87°07ʹ30ʺ/N 41°42ʹ30ʺ--N 41°30ʹ00ʺ).
Note
Also shows vegetation. Relief shown by contours, hachures, and spot heights; depths, by soundings and isolines. Compiled from U.S. Geological Survey topographic 7.5 minute quadrangle maps, 1953. "Contour interval 5 and 10 feet." "Red tint indicates areas in which only landmark buildings are shown." Includes "Contour interval diagram" and quadrangle location map.