Topography in Illinois from aerial photographs by Kelsh plotter, Aerial photographs taken 1956. Field check 1957, Topography in Indiana by planetable surveys 1940-1941, Culture revised from aerial photographs taken 1956. Field check 1957.;Contour interval 10 feet.;Relief shown by contours and spot heights.;1 map, colored;45 x 35 cm.;1:62,500
Creator:
Geological Survey (U.S.)
Publisher:
Geological Survey (U.S.), Geological Survey Division (Urbana, Ill.), and Indiana Dept. of Conservation (Indianapolis, Ind.)
The University of Illinois Map Library requests the following acknowledgement be included when using this Historical Map: Map provided courtesy of the Map Library at the University of Illinois at Urbana-Champaign.; No Copyright - United States; http://rightsstatements.org/vocab/NoC-US/1.0/