001 Quantum Spatial, Inc. 20140627 Lidar point cloud This dataset is LiDAR point cloud data and derivative models of Madison County, Illinois. Madison County is approximately 904 square miles in south western Illinois bordering the Mississippi River. The contractual point spacing was to be 1.0 points per square meter, the data collection came in 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. Tiled LAS and derived data models are named according to the coordinates at the south west corner of the tile. Quantum Spatial Project No: 1140309 USGS NGP Base Specification v1 Leica ALS70 Serial Number 7220 4returns per pulse 0.67 meters 2.21 points per meter squared 1970 - 2100 meters 150 knots 40.0 degrees 39.1 Hz 261000 Hz 4 nanoseconds 0.48 meters, 1/e^2 1064 nanometers 1 [enabled] 0.15 milliradians 1528.67 meters 15.24% NAD_1983_2011_StatePlane_Illinois_West_FIPS_1202_Ft_US National Geodetic Survey (NGS) Geoid12A 0.33 feet 0.517 feet 0.587 feet Open Terrain survey points compared to DEM. 95th percentile 0.587 feet Urban survey points compared to DEM. 95th percentile 0.276 feet Tall Grass survey points compared to DEM. 95th percentile 0.487 feet Brush survey points compared to DEM. 95th percentile 0.696 feet Forest survey points compared to DEM. 95th percentile 0.321 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 Building 7 All noise 8 Model Key 9 Water 10 Ignored ground LiDAR data collection is used to produce high accuracy surface models of Madison 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. None. 20140323 20140331 ground condition complete none planned -90.277 -89.596 39.004 39.653 None Elevation data LiDAR LAS Bare Earth DEM Breakline None Illinois Madison County Edwardsville Alton Granite City 4 None Class Time stamp Date Elevation 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. 0.138 feet (4.21 cm) RMSE calculated by comparison of open terrain survey points to DEM elevations. FVA tested 0.270 feet (8.23 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. Quantum Spatial, Inc. 20140622 vector digital data and tabular data Sheboygan, WI Quantum Spatial, Inc. None none disk 20140405 20140416 ground condition QSI_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 20140323 20140331 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 201406 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. QSI_Gnd_survey 20140622 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 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 201404 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. Swath overage points are identified and tagged within each swath. Overage points may be classed as Overlap (12) or classed to Non-ground (1). QSI_LiDAR_Acquire 201405 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 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 Key Point (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 201406 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) Ground (class 2) LiDAR is used to create a bare earth surface model. The surface model is then used to heads-up digitize 2D breaklines of rivers of specific width and lakes of specific size. Breaklines delineate the margin where surface water and ground meet. Elevation values are assigned to lakes in accordance with ground data where the water and ground surfaces meet. Elevation values are assigned to rivers of adequate width and are created to depict the flow of the drainage; following the change in ground elevation at the edge of the drainage. All ground (Class 2) LiDAR data inside of the collected inland breaklines are classified to water (Class 9) using TerraScan macro functionality. A buffer of 1 meter is maintained along breaklines of each hydro flattened feature. Points within this one meter buffer are classed from ground (Class 2) to Ignored Ground (Class 10). The breakline files are then translated to ESRI Shapefile format using ESRI conversion tools. QSI_LiDAR_Acquire 201406 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) Ground (Class 2) points in conjunction with the hydro breaklines are used to generate DEM files in ASCII format on a per tile basis with hydro Breaklines in place to delineate surface water and with neighboring tile data available to minimize seams between tiles. The DEM are converted to ESRI Grid format. Resulting DEM are reviewed in ArcMap for adherence, completeness and any anomalies or inconsistencies. QSI_LiDAR_Acquire 201406 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) On a per tile basis, data files and Triangulated Integrated Network (TIN) files are generated by processing finalized Ground (class 2) LiDAR points with hydro breaklines delineating surface water through a Geopak macro. Subsequent files are reviewed for adherence and completeness to the data and tile layout used during the creation process. QSI_LiDAR_Acquire 201406 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. Tiles are named according the coordinates at the south west corner of the tile. Point Point State Plane Coordinate System 1983 1202 Illinois State Plane West .999941 -90.1666 36.6666667 2296583.333 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. 20140627 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