DataSummaryA 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. Metadata 30M DEM.htmlYour browser does not support iframes, but you can use the following link. Link DataZip Data: 30M DEM.zip (112.45 MB) Serviceshttps://data.isgs.illinois.edu/arcgis/rest/services/Elevation/IL_DEM_30M/ImageServer ViewerYour browser does not support iframes, but you can use the following link. Link