Quantum Spatial, Inc. 20181129 Vector digital data Product: Contours with a 2-foot interval in Esri file geodatabase format. Geographic Extent: The AOI includes 1 partial and 3 whole counties in Central and Eastern Pennsylvania, covering approximately 2681 total square miles. Dataset Description: The Pennsylvania 3 County South Central 2018 LiDAR project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.7 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LiDAR Specification, Version 1.2. The data were developed based on a horizontal projection/datum of NAD 1983 (2011), UTM Zone 18, meters and vertical datum of NAVD 1988 (GEOID 12B), meters. LiDAR data were delivered as processed Classified LAS 1.4 files formatted to 3360 individual 1,500-meter x 1,500-meter tiles, as tiled intensity imagery, and as tiled bare earth DEMs; all tiled to the same 1,500-meter x 1,500-meter schema. Continuous breaklines were produced in Esri file geodatabase format. Ground Conditions: LiDAR was collected in winter and spring of 2018, while no snow was on the ground and rivers were at or below normal levels. In order to post process the LiDAR data to meet task order specifications and meet ASPRS vertical accuracy guidelines, Quantum Spatial, Inc. utilized a total of 61 ground control points that were used to calibrate the LiDAR to known ground locations established throughout the project area. An additional 85 independent accuracy checkpoints, 85 in Bare Earth and Urban landcovers (85 NVA points), 64 in Tall Weeds categories (64 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data. To acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments and elevation modeling, etc. Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create intensity images, breaklines and raster DEMs. The purpose of these LiDAR data was to produce high accuracy 3D hydro-flattened digital elevation models (DEMs) with a 1-meter cell size. These raw LiDAR point cloud data were used to create classified LiDAR LAS files, intensity images, 3D breaklines, and hydro-flattened DEMs as necessary. USGS Contract No. G16PC00016, Task Order No. 140G0218F0075; CONTRACTOR: Quantum Spatial, Inc. 20171202 20180413 ground condition Complete None planned -76.8137310003 -76.2201390002 41.5900339997 41.2763746276 None Model Contours None Commonwealth of Pennsylvania Berks County Luzerne County Schuylkill County Sullivan County No restrictions apply to these data. All deliverable data and documentation shall be free from restrictions regarding use and distribution. Data and documentation provided under this Task Order shall be freely distributable by government agencies. 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 their limitations. Data cover the entire area specified for this project. All files are inspected to ensure that they conform to the specified file naming conventions, all files load in their correct geographic position, all files conform to the project specifications for file standard and content. Contour Processing: Using automated scripting routines within ArcMap, a terrain surface was created using the ground (ASPRS Class 2) LiDAR data as well as the hydro-flattened breaklines. This surface was then used to generate the final 2-foot contour dataset in Esri File Geodatabase format. 2018 Vector Universal Transverse Mercator 18 0.9996 -75 0 500000 0 coordinate pair 0.01 0.01 meters NAD 1983 (2011) Geodetic Reference System 80 6378137.0 298.257222101 NAVD 1988 (GEOID 12B) 2.0 feet Explicit elevation coordinate included with horizontal coordinates Contour line A line on a map that connects points of equal elevation based on a vertical datum, usually sea level. Esri GIS Dictionary http://support.esri.com/en/knowledgebase/GISDictionary/term/contour%20line FID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Feature geometry. Esri Feature geometry - PolylineZM Type Contour Type LiDAR Data Intermediate LiDAR Data LAS version 1.4 Index LiDAR Data LAS version 1.4 Contours with the types of Intermediate and Index. More detail about the attributes of this data set can be found in LAS 1.4 specifications and USGS LiDAR Base Specification Version 1.2. 20181129 Quantum Spatial mailing and physical

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