<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE metadata SYSTEM "http://fgdc.gov/metadata/fgdc-std-001-1998.dtd">
<metadata>
	<idinfo>
		<citation>
			<citeinfo>
				<origin>Quantum Spatial, Inc.</origin>
				<pubdate>20181026</pubdate>
				<title>South Central Pennsylvania 2017 QL2 LiDAR; First Return DSM</title>
				<geoform>Raster digital data</geoform>
			</citeinfo>
		</citation>
		<descript>
			<abstract> Product: These are Digital Surface Model (DSM) data for South Central
				Pennsylvania as part of the required deliverables for the South Central Pennsylvania
				2017 QL2 LiDAR project. First return lidar points were used to create a 1-meter
				raster DSM. Geographic Extent: 13 counties in Pennsylvania, covering approximately
				6,602 total square miles. Dataset Description: The South Central Pennsylvania 2017
				QL2 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 7,975 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
				fall 2017, 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 150 ground control points that were used to calibrate the LiDAR to known ground
				locations established throughout the project area. An additional 245 independent
				accuracy checkpoints, 142 in Bare Earth and Urban landcovers (142 NVA points), 103
				in Tall Weeds categories (103 VVA points), were used to assess the vertical accuracy
				of the data. These checkpoints were not used to calibrate or post process the
				data.</abstract>
			<purpose>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.</purpose>
			<supplinf> Raster File Type = IMG Bit Depth/Pixel Type = 32-bit float Raster Cell Size =
				1.0 Meters Interpolation or Resampling Technique = Triangulated Irregular Network
				(TIN), Linear Interpolation, Proprietary </supplinf>
		</descript>
		<timeperd>
			<timeinfo>
				<rngdates>
					<begdate>20171121</begdate>
					<enddate>20171221</enddate>
				</rngdates>
			</timeinfo>
			<current>ground condition</current>
		</timeperd>
		<status>
			<progress>Complete</progress>
			<update>None planned</update>
		</status>
		<spdom>
			<bounding>
				<westbc>-78.10056682</westbc>
				<eastbc>-76.15029659</eastbc>
				<northbc>41.59758202</northbc>
				<southbc>39.71890736</southbc>
			</bounding>
		</spdom>
		<keywords>
			<theme>
				<themekt>None</themekt>
				<themekey>Model</themekey>
				<themekey>Raster</themekey>
				<themekey>DSM</themekey>
				<themekey>Remote Sensing</themekey>
				<themekey>Elevation Data</themekey>
				<themekey>Lidar</themekey>
			</theme>
			<place>
				<placekt>None</placekt>
				<placekey>Pennsylvania</placekey>
				<placekey>Adams County</placekey>
				<placekey>Columbia County</placekey>
				<placekey>Cumberland County</placekey>
				<placekey>Franklin County</placekey>
				<placekey>Juniata County</placekey>
				<placekey>Lebanon County</placekey>
				<placekey>Lycoming County</placekey>
				<placekey>Mifflin County</placekey>
				<placekey>Montour County</placekey>
				<placekey>Northumberland County</placekey>
				<placekey>Perry County</placekey>
				<placekey>Snyder County</placekey>
				<placekey>Union County</placekey>
			</place>
		</keywords>
		<accconst>No restrictions apply to these data.</accconst>
		<useconst>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 their limitations.</useconst>
	</idinfo>
	<dataqual>
		<logic>Data cover the entire area specified for this project.</logic>
		<complete>Datasets contain complete coverage of tiles. A visual qualitative assessment was
			performed to ensure data completeness. Void areas are denoted with the following NODATA
			value: #.</complete>
		<lineage>
			<procstep>
				<procdesc>First Return DSM Processing: First return and non-noise LAS points were
					used to create a 1-meter raster DSM in ERDAS .img format. Products were
					delivered in tiles and county mosaics.</procdesc>
				<procdate>2018</procdate>
			</procstep>
		</lineage>
	</dataqual>
	<spdoinfo>
		<direct>Raster</direct>
		<rastinfo>
			<rasttype>Pixel</rasttype>
			<rowcount>1500</rowcount>
			<colcount>1500</colcount>
		</rastinfo>
	</spdoinfo>
	<spref>
		<horizsys>
			<planar>
				<gridsys>
					<gridsysn>Universal Transverse Mercator</gridsysn>
					<utm>
						<utmzone>18</utmzone>
						<transmer>
							<sfctrmer>0.9996</sfctrmer>
							<longcm>-75</longcm>
							<latprjo>0</latprjo>
							<feast>500000</feast>
							<fnorth>0</fnorth>
						</transmer>
					</utm>
				</gridsys>
				<planci>
					<plance>coordinate pair</plance>
					<coordrep>
						<absres>1.0</absres>
						<ordres>1.0</ordres>
					</coordrep>
					<plandu>meters</plandu>
				</planci>
			</planar>
			<geodetic>
				<horizdn>NAD 1983 (2011)</horizdn>
				<ellips>Geodetic Reference System 80</ellips>
				<semiaxis>6378137.0</semiaxis>
				<denflat>298.257222101</denflat>
			</geodetic>
		</horizsys>
		<vertdef>
			<altsys>
				<altdatum>NAVD 1988 (GEOID 12B)</altdatum>
				<altres>0.01</altres>
				<altunits>meters</altunits>
				<altenc>Explicit elevation coordinate included with horizontal coordinates</altenc>
			</altsys>
		</vertdef>
	</spref>
	<metainfo>
		<metd>20181026</metd>
		<metc>
			<cntinfo>
				<cntorgp>
					<cntorg>Quantum Spatial</cntorg>
				</cntorgp>
				<cntaddr>
					<addrtype>mailing and physical</addrtype>
					<address>523 Wellington Way</address>
					<city>Lexington</city>
					<state>KY</state>
					<postal>40503</postal>
					<country>USA</country>
				</cntaddr>
				<cntvoice>859-277-8700</cntvoice>
				<cntfax>859-277-8901</cntfax>
				<cntemail>jbowen@quantumspatial.com</cntemail>
				<hours>Monday through Friday 8:00 AM to 5:00 PM (Eastern Time)</hours>
				<cntinst>If unable to reach the contact by telephone, please send an email. You
					should get a response within 24 hours.</cntinst>
			</cntinfo>
		</metc>
		<metstdn>FGDC Content Standard for Digital Geospatial Metadata</metstdn>
		<metstdv>FGDC-STD-001-1998</metstdv>
		<metac>None.</metac>
		<metuc>None.</metuc>
		<metsi>
			<metscs>None.</metscs>
			<metsc>Unclassified</metsc>
			<metshd>NONE</metshd>
		</metsi>
	</metainfo>
</metadata>
