Illinois Height Modernization: LiDAR Derivatives
ArcGrid format datasets are available for free download for selected Illinois counties. The classified LiDAR LAS point cloud data have been processed to create a full-resolution digital terrain model (DTM) or digital elevation model (DEM), as well as a digital surface model (DSM) for each county area. Additionally, the associated shaded relief model, or ‘hillshade’, has been created for each DTM/DEM and DSM. An ArcGIS v.10.1 mxd is provided for each county, and the ArcGrid pyramid files and statistics have been created for the county derivatives in order to facilitate display and analysis.