A computer-generated map showing the elevation of the surface of the state. A 36" × 64" version of this map may be purchased by contacting the ISGS Information Office.
E. Donald McKay, III, Director
615 E. Peabody
Champaign, IL 61820
© 2014 University of Illinois Board of Trustees. All rights reserved.
For permissions information, contact the Illinois State Geological Survey.