Based primarily on U.S.G.S. topographic quadrangles.;Black line drawn map of Illinois;Includes "limit of glaciation" line; Physiographic divisions of Illinois;Landforms, rivers, canals;Relief shown pictorially
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/