Landforms of Illinois with a shaded relief portrayal. Derived from USGS Digital Elevation Model(DEM) data. Illustrates various Illinois landforms including glacial moraines, river valleys, glacial till plains, and bedrock structures. No attributes present. ISGS, 1994.FileengIllinois Geospatial Data ClearinghousePublicSurface Elevation: 301-Foot Shaded Relief Map [Illinois]Datasets