Surdex Corporation Unpublished Material Unknown point cloud This project involved fixed wing aerial LIDAR data collected at a contracted point spacing of 0.70 meters for the Illinois Counties of Ford, Iroquois and Livingston totaling approximately 2,740 square miles. To acquire detailed surface elevation data for the Illinois Height Modernization Program (ILHMP) which is managed by the Illinois State Geological Survey (ISGS). LiDAR Leica ALS70-HP 1.0 4 0.67 2.20 0.67 2.20 1450 150 40 53.4 375 10 3 1064 1 0.22 1055 20 NAD_1983_2011_Stateplane_Illinois_East_FIPS_1201_Ft_US National Geodetic Survey (NGS) Geoid12A. The GEOID12A model is intended to transform between NAD 83 (2011/PA11/MA11) and the respective vertical datums for the different regions, including NAVD88, GUVD04, ASVD02, NMVD03, PRVD02 and VIVD09. 0.328 feet RMSEz 0.256 feet RMSEz, 0.502 feet 95% ACCz Confidence Level bare-earth, short grass 215 0.217 feet RMSEz, 0.425 feet 95% ACCz Confidence Level bare-earth, short grass 215 0.956 feet 95th Percentile, Tall Grass, Trees/Forested, Brush 292 1.2 17 11 11 3 1 Unclassified 2 Ground 3 Low vegetation 4 Medium vegetation 5 High vegetation 6 All structures except bridges 7 All noise 8 Keypoint 9 Water 10 Proximity to hydro breakline 14 bridge decks 17 Overlap unclassified 18 Overlap ground 19 Overlap Low vegetation 20 Overlap Medium vegetation 21 Overlap High vegetation 22 Overlap All structures except bridges 23 Overlap All noise 24 Overlap Keypoint 25 Overlap Water 26 Overlap proximity to hydro breakline 20150331 20150427 20150428 20150429 20150430 20150501 20150502 20150503 20150507 20150603 20150604 20150606 20150607 ground condition Complete Unknown -88.94396982 -87.51402759 40.39269862 41.12016671 816000.00 1210000.00 1358000.00 1622000.00 LiDAR Digital Elevation Data State Illinois Counties Ford_Iroquois_Livingston unknown unknown Illinois State Geological Survey Sheena K Beaverson Program Manager, Illinois Height Modernization mailing address

Prairie Research Institute, Univ of IL Urbana-Champaign

615 East Peabody Drive

Champaign IL 61820 (217) 244-9306 sbeavers@illinois.edu Created by Surdex Corporation through Contract with the University of Illinois none Unclassified none Microsoft Windows 7.0 Service Pack 1; ESRI ArcCatalog 9.3.0.1770 ILHMP 20160115 Unknown raster digital data All files are inspected to ensure that they conform to the specified file naming conventions. 0 See Surdex LiDAR Accuracy Report All files load in their correct geographic position and conform to the USGS LiDAR Base Specifications. All files are inspected to ensure that they conform to the specified file naming conventions, all files load in their correct geographic position, all files conform to the project specifications for file standard and content 2 ft RMSE The LAS Data must meet a Non-Vegetated Vertical Accuracy (NVA) equal to or less than 0.328 feet (10cm ) RMSEz. These vertical accuracies were tested using 215 independent survey check points in the following feature types: Bare-earth (BE), Short Grass (SG). 0.256 feet RMSEz, 0.502 feet ACCz 95% Confidence Level USGS Quality Level 2 or better Acquisition was completed in early June 2015 using a twin engine Cessna 335 equipped with a Leica ALS70HP. Flight plan parameters were based on 4757 feet AGL, 40 deg FOV, 375,600 pulse rate, 20% sidelap, 0.67 meter NPS. Crews based out of Pontiac, Schertz, Kankakee and Kentland IL airports. All flights have calibration lines flown at beginning and end of flight perpendicular to lines captured during that mission. Base stations were continuously running during missions and placed so flight baseline never exceeds 25 miles. GPS-IMU captured during flight was processed using Waypoint's Inertial Explorer software. The bare-earth Lidar data was processed to USGS (NGP) Base Lidar Specifications V1.0 using the Terrasolid software suite. LiDAR point was initally processed with macros to locate bare earth ground, buildings and three classes of vegetation but was manually reviewed by experienced technicians in TerraScan or LP360 software for proper point classifciations in LAS tile format. Derivative product formats such as *.DAT, *.DGN, ESRI raster grid and TIN formats were produced using ESRI, Microstation and other software formats. Due to the late spring acquisition dates there is a higher than normal level of low vegetation classified points present in agricultural fields. Hydro features were collected on streams and rivers 100~ feet or wider and on lakes 2~ acres or larger. These lines were hydro flattened into the Lidar data and delivered in ESRI geodatabase file format. Unknown Surdex Corporation Wade Williams, CP Project Manager mailing and physical address

520 Spirit of St. Louis Blvd

Chesterfield Missouri 63005 636-368-4458 (636) 368-4459 wadew@surdex.com Raster coordinate pair 1 1 feet State Plane Coordinate System 1983 1201 0.999975 -88.3333333 36.6666666 984250.0 0.000000 NAD_1983_2011_Stateplane_Illinois_East_FIPS_1201_Ft_US Geodetic Reference System 80 6378137.000000 298.257222 North American Vertical Datum of 1988,Geoid2012A 1 feet Explicit elevation coordinate included with horizontal coordinates This LiDAR project was contracted by ISGS.This LiDAR project was contracted by ISGS.This LiDAR project was contracted by ISGS. Illinois State Geological Survey Sheena K Beaverson Program Manager, Illinois Height Modernization mailing address

Prairie Research Institute, Univ of IL Urbana-Champaign

615 East Peabody Drive

Champaign IL 61820 (217) 244-9306 sbeavers@illinois.edu Downloadable Data unknown LAS 1.2 1.00 DVD ISO 9660 unknown 20160509 Surdex Corporation Wade Williams, CP Project Managert mailing and physical address

520 Spirit of St. Louis Blvd

Chesterfield Missouri 63005 636-368-4458 (636) 368-4459 wadew@surdex.com FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile