Quantum Spatial, Inc. 20140609 LiDAR point cloud Task Order:G13PD00885 Contract ID: G10PC00025 This data set is part of the LiDAR point cloud data of Logan County, Illinois. The total area of acquisition is approximately 618 square miles (1600 square kilometers). This data set consists of LiDAR LAS swath files collected during Lift 20131127-144235. 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 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. 20131127 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aware that temporal changes may have occurred since this data set was collected and that some parts of these data may no longer represent actual surface conditions.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 LiDAR data and ground survey point elevations. Differences are calculated to establish an RSME. 0.0377 meters RSME of ground classified point cloud The FVA is tested using ground survey points. The check points are compared to TIN derived from LiDAR points. Differences in elevations are calculated to determine an RSME. The RMSE value is multiplied by 1.96. The vertical accuracy needs to meet the requirement of RMSE less than 9.25 cm and of FVA less than 18.13 cm. 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 20131127 ground condition QSI_LiDAR_Acquire This data source is used to acquire and record airborne LiDAR point set and GPS and IMU data. 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

Centennial 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) 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