Quantum Spatial, Inc. 20141126 Lidar point cloud This dataset is 1 ppsm LiDAR point cloud data and derivative models of Will County, Illinois, However after processing the dataset satisfies 2 ppsm and Quality Level 2 data. Will County is approximately 840 square miles (2175 square kilometers) in north eastern Illinois. Data was collected at a nominal pulse spacing (NPS) of 0.7 meter. Data acquisition, processing and assessment is compliant with procedures and methods stated in U.S. Geological Survey National Geospatial Program LiDAR Base Specification Version 1.0 and Federal Emergency Management Agency Procedure Memorandum 61. This dataset consists of LiDAR LAS swath files and tiled LAS files. Tiled LAS files contain LiDAR point information which has been calibrated, controlled, and classified. Quantum Spatial Project No: 1140310.02 USGS NGP Base Specification v1 Leica ALS70 Serial Number 7161 4 returns per pulse 0.64 meters 2.44 points per meter squared 1900 meters 150 knots 40.0 degrees 40.9 Hz 273600 Hz 4 nanoseconds 0.45 meters, 1/e^2 1064 nanometers 1 [enabled] 0.15 milliradians 1455.88 meters 17.25% NAD_1983_2011_StatePlane_Illinois_East_FIPS_1201_Ft_US National Geodetic Survey (NGS) Geoid12A 1.00 feet 0.402 feet 0.527 feet Open Terrain survey points compared to DEM. 95th percentile 0.373 feet Urban survey points compared to DEM. 95th percentile 0.469 feet Tall Grass survey points compared to DEM. 95th percentile 0.517 feet Brush survey points compared to DEM. 95th percentile 0.627 feet Forest survey points compared to DEM. 95th percentile 0.504 feet 1.2 1 Withheld (ignore) points were identified in these files using the standard LAS Withheld bit There are not Overlap class points in this data. 8-bit 1 Undetermined/Unclassified 2 Bare-earth 3 Low Vegetation 4 Medium Vegetation 5 High Vegetation 6 Buildings 7 All noise 8 Model Keypoints 9 Water 10 Ignored ground LiDAR data collection is used to produce high accuracy surface models of Will County, Illinois in accordance with project requirements. The LiDAR point cloud data is used to create surface models as requested; classified LiDAR LAS files, Hydro-flattened bare-earth Digital Elevation Models (DEM), shapefiles of breaklines representative of surface hydro features and a ESRI geodatabase of all deliverables. 20140405 20140419 ground condition complete none planned -88.155 -87.512 41.744 41.204 None Elevation data LiDAR LAS Bare Earth DEM Breakline None Illinois Will County Bolingbrook Joliet No restrictions apply to accessing this data. None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. Quantum Spatial, Inc. Jeff Stroub mailing and physical

4020 Technology Parkway

Sheboygan WI 53083 USA 920-457-3631 920-457-0410 jstroub@quantumspatial.com Monday through Friday 8:00 AM to 4:00 PM (Central Time) ALS Post Processor 2.75 Build#25; GeoCue Version 13.1.45.1; Windows 7 Operating System Data cover the entire area specified for this project. These data files include all data points collected. No points have been removed or excluded. The raw point cloud is of good quality and data passes Fundamental Vertical Accuracy specifications. Project specifications require that vertical accuracy, as RMSE, of LiDAR data be less than 9.25 cm in open terrain. Vertical accuracy is determined by comparison of elevation of the ground survey points to DEMs derived from the LiDAR points. Differences are calculated to establish a RSME. The FVA is determined using ground survey points collected in "Open Terrain" compared to elevation values of a DEM derived from the final LiDAR points classified as bare earth. Differences in elevations are calculated to determine a RSME. The RMSE value is multiplied by 1.96 to establish the FVA. 0.21 feet (6.25 cm) RMSE calculated by comparison of open terrain survey points to DEM elevations. FVA tested 0.40 feet (12.25 cm) vertical accuracy at 95-percent confidence level. The vertical accuracy meets the requirement of RMSE less than 9.25 cm and of a FVA less than 18.13 cm. American Surveying and Engineering, PC 20140626 vector digital data and tabular data Chicago, IL American Surveying and Engineering None none disk 20140513 20140515 ground condition ASE_Gnd_survey This data source is used (along with the airborne GPS/IMU data) to index the LiDAR point cloud data. Additional survey data from particular ground cover categories are used to assess vertical accuracy of LiDAR point data or models derived from LiDAR point data in those categories appropriate. Quantum Spatial, Inc. 201406 vector digital data and tabular data Sheboygan, WI Quantum Spatial, Inc. None none disk 20140405 20140419 ground condition QSI_LiDAR_Acquire This data source is used to acquire and record airborne LiDAR point set and GPS and IMU data. Quantum Spatial, Inc. 201406 LiDAR data Sheboygan, WI Quantum Spatial, Inc. None none disk 20141126 ground condition QSI_Lidar_Proc_Class This data source is to process the LiDAR data set; indexing, classification, producing hydro breaklines and producing requested surface models. Ground based survey points are collected to be compared as check points with airborne data points. Measurements are recorded by Quantum Spatial for use in establishment of the LiDAR point set to ground elevations (indexing). Additional ground survey points are made in representative ground cover categories to provide for vertical accuracy assessment of LiDAR data or derivative models. ASE_Gnd_survey 20140626 American Surveying and Engineering unknown mailing and physical

105 W. Madison St

Suite 1700

Chicago IL 60602 USA 312-277-2000 312-277-2002 Monday through Friday 8:00 AM to 4:00 PM (Central Time) Airborne LiDAR collection survey is conducted using fixed wing aircraft equipped with a LiDAR scanning system following specifications of the flight plan. Acquisition flights are planned to assure full coverage of the project area in consideration of local surface terrains. Flight plan is accessed by the aircraft navigation system to achieve predetermined flight specifications. The LiDAR sensor is calibrated prior to each mission. GPS and IMU data are collected during LiDAR acquisition to aid in LiDAR swath calibration. QSI_LiDAR_Acquire 20140419 Quantum Spatial, Inc. Jeff Stroub mailing and physical

4020 Technology Parkway

Sheboygan WI 53083 USA 1-920-457-3631 1-920-457-0410 jstroub@quantumspatial.com Monday through Friday 8:00 AM to 4:00 PM (Central Time) Airborne GPS and IMU data are merged to develop a Single Best Estimate Trajectory for each swath. LiDAR data are calibrated using previous best parameters for this instrument and aircraft. Relative calibration is evaluated using plane-matching analysis and parameter corrections are derived. This is repeated iteratively until residual errors between overlapping swaths, across all project lifts, is reduced to acceptable levels. Data are block adjusted to surveyed control points. Raw FVA is checked using surveyed ground checkpoints. The raw points are applied to a 5000 x 5000 foot grid. The unclassified points are output and named as per a client supplied 5000 foot grid tile. QSI_LiDAR_Acquire 20140419 Quantum Spatial, Inc. Jeff Stroub mailing and physical

4020 Technology Parkway

Sheboygan WI 53083 USA 1-920-457-3631 1-920-457-0410 jstroub@quantumspatial.com Monday through Friday 8:00 AM to 4:00 PM (Central Time) Points in the calibrated swaths are classified using analysis routines and proprietary software. The routines analyze information on all points to establish appropriate Class designations. Classified LiDAR is inspected on a per tile basis for local classification, manual editing, and peer-based QC checks. The bare earth surface is manually reviewed to ensure correct classification of Class 2 (Ground) points. After the bare-earth surface is finalized, it is used to guide hydro-breaklines generation through heads-up digitization. All overlap data is processed through automated functionality provided by TerraScan to classify the overlapping flight line data to approved classes by USGS. The overlap data is classified to Class 17 (Overlap Default) and Class 18 (Overlap Ground). These classes are created through automated processes only and are not verified for classification accuracy. Due to software limitations within TerraScan, these classes are used to trip the withheld bit within various software packages. These processes were reviewed and accepted by USGS. All data was manually reviewed and any remaining artifacts removed using controls and tools in TerraScan and TerraModeler. Global Mapper is used as a final check of the bare earth dataset. GeoCue creates the deliverable industry-standard LAS files for both the All Point Cloud Data and the Bare Earth. All classification tags are stored in the original swath files. Classifications follow ASPRS guidelines: Non-ground (Class 1), Ground (Class 2), Low Vegetation (Class 3). Medium Vegetation (Class 4), High Vegetation (Class 5), Buildings (Class 6), Noise/Low Points (Class 7), Model Keypoints (Class 8), Water (Class 9), Ignored Ground/Breakline proximity (Class 10) After completion of classification and final QC approval, the FVA, SVAs, and CVA for the project are calculated. Vertical accuracy is determined by comparison of elevation of the ground survey check points to elevations of DEMs derived from the LiDAR Ground points. Differences are calculated to establish a RSME, FVA, CVA and SVA. QSI_LiDAR_Acquire 20140419 Quantum Spatial, Inc. Jeff Stroub mailing and physical

4020 Technology Parkway

Sheboygan WI 53083 USA 1-920-457-3631 1-920-457-0410 jstroub@quantumspatial.com Monday through Friday 8:00 AM to 4:00 PM (Central Time) Data and models conform to the a tiling scheme of 5000 x 5000 feet. Point Point State Plane Coordinate System 1983 1201 Illinois State Plane East .999975 -88.3333 36.6666667 984250 0 coordinate pair 3.2 3.2 survey feet North American Datum of 1983 2011 Geodetic Reference System 80 6378137.000000 298.257222101 North American Vertical Datum of 1988 0.01 survey feet Explicit elevation coordinate included with horizontal coordinates Kelly Jo Hoffman University of Illinois Champaign Urbana Facilities and Services, Planning Division mailing and physical address

Physical Plant Service Building

1501 S Oak Street

Champaign IL 61820 USA unknown unknown Access to the data is available as the University of Illinois Champaign Urbana makes the data public. In no event shall the creators, custodians, or distributors of these data be liable for any damages arising out of its use, or from the inability of the customer to use these data for their intended application. 20141126 Quantum Spatial, Inc. Jeff Stroub mailing and physical

4020 Technology Parkway

Sheboygan WI 53083 USA 1-920-457-3631 1-920-457-0410 jstroub@quantumspatial.com Monday through Friday 8:00 AM to 4:00 PM (Central Time) FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 None None None Unclassified None None None