Statewide 30-Meter Digital Elevation Model [Illinois]
A digital elevation model (DEM) in ArcINfo grid format. Data were assembled to provide a statewide database of surface elevation points suitable for analyses of statewide geologic phenomena associated with elevation. ISGS, 2003.
Donald Luman, Goldsmith, Chris, 1954-, Illinois State Geological Survey, and Smith, Lisa R. (Geologist)