Quantum Spatial, Inc. (formerly AeroMetric, Inc.) 20140612 remote-sensing image This LiDAR data is within Illinois Department of Transportation District 5 and includes Champaign County, Illinois. The data is updated from its original format to LAS version 1.2. The LiDAR data was collected in April 2008 as "Champaign Co., IL LiDAR" and was Task Order Number: 3. Data was acquired by Quantum Spatial as project 1080208 with an Optech ALTM 3100 sensor equipped with an inertial measuring unit (IMU) GPS receiver. The acquisition was to produce bare earth ASCII, LAS data and 2 foot contour Shapefiles. The LiDAR data is updated to be more compatible within the guidelines of the National Digital Elevation Program. (NDEP) The Champaign County, Illinois LiDAR Acquisition project was to provide high accuracy bare-earth processed LiDAR data and produce 2 foot contours for the county, approximately 988 square miles. The project consisted of acquisition, post-processing, classification of LiDAR data and contour generation. The data was collected at nominal horizontal spacing of 1.2 meters based on the Illinois State Plane Coordinate System, East Zone, related to the North American Datum of 1983 (NSRS2007). Vertical accuracy was to achieve a tested accuracy to support 2 foot mapping relative to the North American Vertical Datum of 1988. 20080416 ground condition Complete unknown -88.463 -87.929 40.401 39.879 None Elevation data Light Detection and Ranging > LiDAR Bare Earth Point Cloud Breakline DEM LAS None US Illinois Champaign Urbana Champaign County None 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be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions.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. Acknowledgment of the Illinois Department of Transportation would be appreciated for products derived from these data. In previous processing this dataset was trimmed to a project boundary that is inside the county boundary. The data does not extend to the county boundary in all places. The DEMs are trimmed to the previous boundary to avoid triangulation between data edge and county boundary. This affects 858 acres at the perimeter. The region is indicated with a shapefile: Champaign_data_voids.shp. Quantum Spatial, Inc. Lidar Manager Lidar Manager mailing and physical address

4020 Technology Parkway

Sheboygan WI 53083 USA 1-920-457-3631 1-920-457-0410 cguy@quantumspatial.com 8:00 am to 5:00 pm Central Standard Time Quantum Spatial, Inc. The vertical accuracy assessment is conducted by comparing ground survey check point z values to processed LiDAR data z values by horizontal proximity. Differences in z values are calculated to express an RMSEz value. Vertical accuracy statement is based on the area of moderate to flat terrain. The accuracy of the LiDAR data as tested met the vertical accuracy of 1.19 foot or less standards, however, derived products may be less accurate in areas of dense vegetation due to a lesser number of points defining the bare-earth in these areas. Data covers the area specified for this project. Complete All these data products were acquired at 1700 meters above mean terrain (AMT) and have a horizontal accuracy of 0.31 meters, with a nominal point spacing of 1.2 meters. This data set was acquired, processed and checked for vertical accuracy in 2008. Vertical accuracy of the LiDAR data was assessed along guidelines of the time established for two foot contour intervals by Federal Emergency Management Agency and by methods of the American Society for Photogrammetry and Remote Sensing and the National Digital Elevation Program. The Fundamental Vertical Accuracy (FVA) of the TIN is to achieve 1.19ft at a 95% confidence level in the "Open Terrain" land cover category according to ASPRS Guidelines to produce contours of two foot intervals. The Consolidated Vertical Accuracy (CVA) of the TIN is to achieve 1.19ft at the 95th percentile according to ASPRS guidelines for points in all land cover categories. Supplemental Vertical Accuracy (SVA) target value of the TIN is 1.19 ft at the 95th percentile as derived by the ASPRS guidelines in each land cover category evaluated. Land Cover categories are Open Terrain, Short Grass, Tall Grass, Brush, and Forest. Quantum Spatial, Inc. (formerly AeroMetric, Inc.) 20081229 raster digital data Sheboygan, WI Quantum Spatial, Inc. None disc 20080416 ground condition Quantum_LiDAR_Acqui_Proc This data source consists of LiDAR airborne acquisition, calibrated and classified, LAS version 1.1, and hydro breaklines. Quantum Spatial, Inc. 20140612 remote sensing data Sheboygan, WI Quantum Spatial, Inc. None disc 20080416 ground condition Quantum_LiDAR_Reproc This data source consists of LiDAR update, reclassification, LAS version 1.2, Digital Elevation Models (DEM) and hydro breaklines. The LiDAR data is captured using twin-engine fixed wing aircraft equipped with a LiDAR system. The LiDAR system includes a differential GPS unit and inertial measurement system to provide superior accuracy. LiDAR swaths are inspected, aligned to one another and indexed to surface check points. Data points are classified, inspected and breaklines added. Derivative data products are produced for delivery. Acquisition parameters: 1. Scanner - Optech ALTM 3100 EA 2. Flight Height - 1700 m above mean terrain 3. Swath Width - 18 degrees 4. Sidelap - 33% 5. Nominal Post Spacing - 1.2 m. GPS and IMU processing parameters: 11. Processing Programs and version - Applanix - POSGPS and POSProc, versions 4.31 2. Max PDOP during LiDAR collection - 3.0 3. Max distance from GPS base stations during collection - less than 35km 4. Mean differential baseline length - 20 km 5. Minimum number of base stations during LiDAR collection - 2 6. IMU processing monitored for consistency and smoothness - Yes. Point Cloud Processing: 1. Program and version - Dashmap, version 3.0005 2. Horizontal Datum - NAD83(NSRS2007) 3. Horizontal Coordinates - Illinois State Plane Coordinate System, 1201, East Zone, in US Survey Foot 4. Vertical Datum - NAVD88 5. Geoid Model used to reduce satellite derived elevations to orthometric heights - NGS Geoid03. LIDAR Processing: 1. Processing Programs and versions - TerraSolid TerraScan (version 008.009) and TerraMatch (version 008.006) and MicroStation (version 08.01.02.15). 2. Point Cloud data is imported to TerraScan in a Microstation V8 (V) CAD environment on a specified 5000 foot by 5000 foot tiling scheme. 3. Analyze the data for overall completeness and consistency. This is to ensure that there are no voids in the data collection. 4. Inspect for calibration errors in the dataset using the TerraMatch software. This is accomplished by sampling the data collected across all flight lines and classify the individual lines to ground. The software will use the ground-classified lines to compute corrections (Heading, Pitch, Roll, and Scale). 5. Orientation corrections (i.e. Calibration corrections) are then applied to the entire dataset. 6. Automatic ground classification is performed using algorithms with customized parameters to best fit the project area. Several areas of varying relief and planimetric features were inspected to verify the final ground surface. 7. Quantum Spatial provided Quality Assurance and Quality Control (QAQC) data for this project. Quantum Spatial captured 166 QA/QC points in multiple land cover categories that were used to test the accuracy of the LiDAR data. TerraScan's Output Control Report (OCR) was used to compare the QAQC data to the LIDAR data. This routine searches the LIDAR dataset by X and Y coordinates, finds the closest LIDAR point and compares the vertical (Z) values to the known data collected in the field. Based on the QAQC data, a bias adjustment was determined, and the results were applied to the LIDAR data. A final OCR was performed with a resulting RMSE of 0.33 feet. 8. Once the automatic processing and the testing of LiDAR is complete, Quantum Spatial reviews the generated bare-earth surface data to insure that proper classification was achieved as part of a Quality Control process. 9. Final deliverables are generated and output to a client specified 2000 ft by 2000 ft tiling scheme. Quantum_LiDAR_Acqui_Proc 20081229 Quantum Spatial, Inc. LiDAR Manager 4020 Technology Parkway Sheboygan WI 53083 USA 1-920-457-3631 1-920-457-0410 cguy@quantumspatial.com Monday through Friday 8:00 AM to 5:00 PM (Central Time) LiDAR data acquired and processed in 2009 is reprocessed in LAS tiles to LAS version 1.2. The data is reclassified to ASPRS point classification. Derivative data products are produced for delivery. Processing programs and versions - TerraSolid TerraScan (version 013.004), TerraModeler (version 013.002) and TerraMatch (version 013.002) and MicroStation (version.08.05.02.70). 1. LAS version 1.0 data is processed through TScan to assign point classifications as: Class 1: Processed, but unclassified / non-ground Class 2: Ground Class 7: Noise / Low Points Class 8: Model Key Points (mass points) Class 9: Water Class 10: Ignored Ground, (Breakline proximity) 2. Data is written to LAS version 1.2 format files on a per tile base 2000 feet by 2000 feet. Quantum_LiDAR_Reproc 201312 Quantum Spatial, Inc. LiDAR Manager 4020 Technology Parkway Sheboygan WI 53083 USA 1-920-457-3631 1-920-457-0410 cguy@quantumspatial.com Monday through Friday 8:00 AM to 5:00 PM (Central Time) Unknown Point State Plane Coordinate System 1983 1201 Illinois State Plane East .999975 -88.333333 36.6666667 984250.0 0 coordinate pair 3.2 3.2 survey feet North American Datum of 1983 (HARN) 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 20140612 Quantum Spatial, Inc. Mailing and physical address

4020 Technology Parkway

Sheboygan WI 53083 US 1-920-457-3631 1-920-457-0410 cguy@quantumspatial.com Monday through Friday 8:00 AM to 5:00 PM (Central Time) FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998