Illinois Height Modernization Data: DuPage County, Illinois

Data Type	Total GB	Ave. File Size	Number of Files
LAS Files, Classified	42.6	175 MB	421 files
XYZI Files, Bare Earth	23.1	55 MB	421 files

Data were acquired by Aero-Metric, Inc.

dupage_lidar2006.xml
Related Data (shapefiles): Data Index (5,000 by 5,000 foot tiling); Bare Earth Points (800 MB); Contours (750 MB); County Boundary, Terrain Boundary, No_Tie_Areas; Rivers, Streams, Water (10 MB); Tie Data: Cook County (195 MB); Tie Data: Kane County (385 MB); Tie Data: Will County (440 MB); Spot Elevations * (5 MB); Breaklines * (54 MB); Buildings, Ditches, Road_Centerlines * (33 MB)

* The Breakline, Spot Elevations, and Buildings, Ditches and Road Centerlines data layers within the Village of Naperville were acquired by a different vendor, Merrick, for a separate village wide terrain dataset. Aerometric Engineering utilized Merrick's breakline data to develop the countywide terrain dataset for DuPage County. This is why the southwest corner of DuPage County appears to have missing information for some derivative data sets. Refer to the DuPage County LIDAR metadata file for City of Naperville information: http://gis.dupageco.org/dupagemaps