Quantum Spatial, Inc. 20140609 LiDAR point cloud Task Order:G13PD00885 Contract ID: G10PC00025 This dataset is LiDAR point cloud data and derivative models of Logan County, Illinois. The area of acquisition is approximately 618 square miles (1600 square kilometers). 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 a tiling scheme in accordance with the conventions of the U.S. National Grid, using the coordinates at the SW corner of the tile as the tile name. Quantum Spatial Project No: 1130905 USGS NGP Base Specification v1 Leica ALS70 sensor SN7220 4 0.5 4.20 1475 150 40 53.4 358 4 NA 1064 1 0.15 1105.16 12 NAD_1983_2011_StatePlane_Illinois_West_FIPS_1202_Ft_US National Geodetic Survey (NGS) Geoid12A 0.1 0.107 0.106 0.1350 Urban 0.0923 Open Terrain 0.0990 Tall Grass/Agriculture 0.1267 Brush/Scrub/Shrub 0.1783 Woods/Forest 0.1338 1.2 1 Withheld (ignore) points were identified in these files using the standard LAS Withheld bit To maintain high point density overage points were not indicated by class 8-bit 0 Never Processed 1 Undetermined/Unclassified 2 Bare-earth 7 All noise 9 Water 10 Ignored ground LiDAR data collection is to produce high accuracy models of the Logan County, Illinois in accordance with requirements outlined in the Task Order Agreement. The raw LiDAR point cloud data is used to create surface models as requested; classified LiDAR LAS files, bare-earth Digital Elevation Models (DEM), Intensity raster of first return, shapefiles of breaklines representative of surface hydro features. Project data includes an area in the northeast of Logan county, from Oran into Chester Townships, where LiDAR data was collected at 8 points per meter. The data is incorporated with the county wide data set which is at 4 points per meter. 8 point per meter collection rate: Average Point Spacing 0.5 meters Average Point Density 8.36 meters Flying Height AGL 775 meters Recommended Ground Speed 150 knots Field of View (FOV) 36 degrees Scan Rate Setting used 56 Hz Laser Pulse Rate used 33.5 Hz Full Swath Width 1105 meters Minimum Sidelap 19 degrees 20131123 20131130 ground condition complete none -89.606 -89.141 40.327 39.916 None Elevation data LiDAR LAS Bare Earth First Return Breakline Intensity Raster None Illinois Logan County Lincoln 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. Chris Guy mailing and physical

4020 Technology Parkway

Sheboygan WI 53083 USA 920-457-3631 920-457-0410 cguy@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 XP 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 a TIN or DEM derived from the final LiDAR ground points and ground survey check point elevations. Differences are calculated to establish a RSME. The vertical accuracy of the LiDAR data set meets the requirement of RMSE less than 9.25 cm and of FVA less than 18.13 cm. 0.0377 meters. RMSE as tested against a TIN derived from LiDAR Ground points A TIN derived from the final LiDAR ground points is compared to ground survey check points. Elevation differences are calculated to establish a RMSE. 0.0739 meters. FVA as tested against a TIN derived from LiDAR Ground points The FVA is tested using Open Terrain ground survey points. The check points are compared to elevation values of a TIN derived from the final LiDAR ground points. Differences in elevations are calculated to determine a RSME. The RMSE value is multiplied by 1.96 to establish the FVA. 0.054 meters. RMSE as tested against a DEM derived from LiDAR Ground points A DEM derived from the final LiDAR ground points is compared to ground survey check points. Elevation differences are calculated to establish a RMSE. 0.106 meters. FVA as tested against a DEM derived from LiDAR Ground points The FVA is tested using Open Terrain ground survey points. The check points are compared to elevation values of a DEM derived from the final LiDAR ground points. Differences in elevations are calculated to determine a RSME. The RMSE value is multiplied by 1.96 to establish the FVA. Compass Data, Inc. 20140328 point data Compass Data, Inc. Compass Data, Inc. None none disk 20131201 20131212 ground condition Compass_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. 20140328 point cloud Quantum Spatial, Inc. Quantum Spatial, Inc. None none disk 20131123 20131130 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. 20140328 point cloud Quantum Spatial, Inc. Quantum Spatial, Inc. None none disk 201403 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 were collected to be compared as check points with airborne data points. These measurements were recorded and provided to Quantum Spatial for use in establishment of the LiDAR data set to ground elevations (indexing). Additional ground survey points may be made to provide for vertical accuracy assessment of LiDAR data or derivative models. Compass_gnd_survey 201312 Compass Data, Inc. unknown mailing and physical

12353 East Easter Ave #200

Centennial6/2/2014 4:33:08 PM CO 80112 USA 303-627-40581 unknown week day business hours (MST) Airborne LiDAR collection survey is conducted using fixed wing aircraft equipped with a LiDAR scanning system following specifications of the flight plan. The system includes a differential GPS unit and inertial measurement system that provide data to aide in assembly of single best estimate trajectory files. QSI_LiDAR_Acquire 20131130 Quantum Spatial, Inc. Chris Guy mailing and physical

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 4:00 PM (Central Time) Collected data alignment is established per flightline resolving for aircraft attitude and position utilizing in-flight GPS and IMU data. Swath data is saved in LAS format where points are differentiated by discreet time, position, return value, intensity, etc. Relative accuracy of swath strips is checked. Data is arranged into a tile layout and point classification routines are accomplished. Classified points are inspected, manually reclassed where necessary and breaklines added. Derivative data products and quality assessments are produced. 1. Automatic surface 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. 2. Each tile is reviewed for accuracy and consistency of the macro ground classification. 3. As automatic processing and the testing of LiDAR is complete technicians review the generated bare-earth surface data to ensure that proper classification was achieved as part of a Quality Control process. Point classification follows the standard established by The American Society for Photogrammetry and Remote Sensing (ASPRS) for LAS data: Code 1 Processed, but unclassified / non-ground Code 2 Bare Earth / Ground Code 7 Noise / Low Points Code 9 Water Code 10 Ignored Ground (Breakline proximity) 4. Linework is created of water bodies and drainage. A routine is used to drape line work following monotonic elevation change of drainage. 5. LAS data and breaklines are processed to derive various surface model types. 6. Bare earth DEM files are generated from classified LAS data and output as hydro flattened models according to the tile layout scheme. Using LP360 the DEMs are generated in an ASCII format on a per tile basis with neighboring tile information available to minimize seams between tiles and with hydro breaklines in place to delineate surface water. These DEM are reviewed using GlobalMapper for adherence and completeness to the data and tile layout used during the creation process. The ASCII files are processed through GlobalMapper into a FLOAT format. These files are converted using ArcMap to the delivered IMG format. QSI_LiDAR_Proc_Class 201403 Quantum Spatial, Inc. Chris Guy mailing and physical

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 4:00 PM (Central Time) Data and models conform to the a tiling scheme of 5280 x 5280 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 .999941176 -90.16666667 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 Robert Kelly United States Geological Survey unknown mailing and physical address

1400 Independence Road

Rolla MO 65401 USA 573-308-3612 ckelly@usgs.gov Access to the data is available as the USGS makes it 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. 20140609 Quantum Spatial, Inc. Chris Guy mailing and physical

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 4:00 PM (Central Time) FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 None None None Unclassified None None None