Merrick & Co 2013 LAS data LAS LAS Greenwood Village, Co Merrick & Co ASPRS v1.2 final classified LAS data grouped into 10 classifications: 1 = Unclassified, 2 = Ground, 3 = Low Vegetation, 4 = Medium Vegetation, 5 = High Vegetation, 6 = Building, 7 = Low point (noise), 8 = Model key-point (mass point), 9 = Water, 10 = Ignored Ground (breakline proximity). One-meter Nominal Point Spacing. USGS NGP Base Specifcation v1 Leica SN53 & SN62 ALS50II+ 4 1 4 2286 170 15 40.5 105.9 12 2.698 1064 1 0.22 1180 16 NAD_1983_HARN_StatePlane_Illinois_East_FIPS_1201_Feet_US National Geodetic Survey (NGS) Geoid09 0.67 meters .08 meters .08 meters 1.2 1 Withheld (ignore) points were identifed in these fles using the standard LAS Withheld bit Swath "overage" points were identifed in these files by adding 16 to the standard classifcation values. 8-bit 1 Undetermined/Unclassifed 2 Ground 3 Low Vegetation 4 Medium Vegetation 5 High Vegetation 6 Buildings 7 All noise 8 Model Key Points 9 Water 10 Ignore Ground (Breakline Proximity) This task is for the processing of a high resolution LiDAR data set for Pulaski, Massac and a portion of Johnson Counties in Illinois, to obtain the Classified LAS point cloud and bare earth DEMs suitable for inclusion in the National Elevation Dataset. LiDAR classification (ASPRS LAS 1.2) Class 1 = Unclassified Class 2 = Ground Class 3 = Low Vegetation Class 4 = Medium Vegetation Class 5 = High Vegetation Class 6 = Building Class 7 = Low point (noise) Class 8 = Model Key-point (mass point) Class 9 = Water Class 10 = Ignored Ground (Breakline Proximity) 20120202 unknown 20120217 unknown ground condition Complete Unknown -89.285894 -88.484985 37.528978 37.058405 none LIDAR DEM First Return none Illinois Pulaski County Massac County Johnson County none 2012 none unknown James Young Aerometric Senior Manager mailing and physical address

17539 White Marble Drive

Monument CO 80132 920.457.3631 jyoung@aerometric.com ArcSDE 9.1 on Oracle 9i The dataset was captured, attributed, and reviewed to ensure completeness and accuracy of at least 95%. The dataset was captured, attributed, and reviewed to ensure completeness and accuracy of at least 95%. The dataset was captured, attributed, and reviewed to ensure completeness and accuracy of at least 95%. N/A FVA (Fundamental Vertical Accuracy) - meet or exceed 12.5cm (0.41') RMSEZ (AccuracyZ = 24.5cm [0.80'] at the 95% confidence level) .41 feet FVA (Fundamental Vertical Accuracy) - meet or exceed 12.5cm (0.41') RMSEZ (AccuracyZ = 24.5cm [0.80'] at the 95% confidence level) Innovative Mapping & Surveying Solutions (InMaSS) 2012 Unknown tabular digital data ground control ground control Zionsville, Indiana Innovative Mapping & Surveying Solutions (InMaSS) disc 2012 publication date ground control control point network to estbalish horizontal and vertical accuracy Merrick & Co 2012 LAS data LiDAR LiDAR Aurora, Co Merrick & Co disc 20120202 unknown 20120217 unknown ground condition LiDAR surface returns used to create surface models and contours LIDAR data was collected using Merrick's ALS50 Phase 2 sensor. The raw data was verified in MARS software for complete coverage of the project area, and boresighted to align the flightlines. Raw data files were parsed into manageable client-specific tiles. These tiles were then processed through automated filtering that separates the data into 10 different classification groups The data was next taken into MARS to reclassify the erroneous points that may remain in the LIDAR point cloud after auto filter. ground control LiDAR 20130901 Doug Jacoby Merrick & Co Project Manager mailing and physical address

5970 Greenwood Plaza Blvd

Greenwood Village Co 80111 USA 303-353-3903 doug.jacoby@merrick.com Point Point 1 NAD_1983_HARN_StatePlane_Illinois_East_FIPS_1201_Feet_US 0.999975 -88.333333 36.666667 984250.000000 0.000000 coordinate pair .001 .001 survey feet D_North_American_1983_HARN Geodetic Reference System 80 6378137.000000 298.257222 North American Vertical Datum of 1988 .001 feet Explicit elevation coordinate included with horizontal coordinates LAS LAS Merrick & Co LiDAR classification (ASPRS LAS 1.2) Class 1 = Unclassified Class 2 = Ground Class 3 = Low Vegetation Class 4 = Medium Vegetation Class 5 = High Vegetation Class 6 = Building Class 7 = Low point (noise) Class 8 = Model Key-point (mass point) Class 9 = Water Class 10 = Ignored Ground (Breakline Proximity) LiDAR classification (ASPRS LAS 1.2) Class 1 = Unclassified Class 2 = Ground Class 3 = Low Vegetation Class 4 = Medium Vegetation Class 5 = High Vegetation Class 6 = Building Class 7 = Low point (noise) Class 8 = Model Key-point (mass point) Class 9 = Water Class 10 = Ignored Ground (Breakline Proximity) 20130901 James Young Aerometric Senior Manager mailing and physical address

17539 White Marble Drive

Monument CO 80132 920.457.3631 jyoung@aerometric.com Please refer to the distribution information section. FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time None. None. http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile