<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE metadata SYSTEM "http://thor-f5.er.usgs.gov/ngtoc/metadata/fgdc-std-001-1998.dtd">
<metadata>
	<idinfo>
		<citation>
			<citeinfo>
				<origin>Woolpert</origin>
				<pubdate>20231027</pubdate>
				<title>OH_StatewideP3_7_B21; Project ID: 222528 - WU300170; Classified Point Cloud</title>
				<geoform>Lidar point cloud</geoform>
			</citeinfo>
		</citation>
		<descript>
			<abstract>Product: Processed, classified lidar point cloud data tiles in LAS 1.4 format.
				Geographic Extent: Approximately 2,916.586 square miles in Ohio.
				Dataset Description: OH_StatewideP3_7_B21 lidar project called for the planning, acquisition, processing, and production of derivative products of QL1 lidar data to be collected an aggregate nominal pulse spacing (ANPS) of 0.35-meters and 8 points per square meter (ppsm). Project specifications were based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 2022 revision A. The data was developed based on a horizontal reference system of NAD83 (2011) Ohio State Plane South FIPS 3402 (EPSG  6551) and a vertical reference system of NAVD88 (GEOID18) US Feet. Lidar data was delivered as processed LAZ 1.4 files formatted to 53,183 individual 1,250-US Feet x 1,250-US Feet tiles.
			  Ground Conditions: Lidar was collected from March 16, 2022, through May 8, 2022 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, Woolpert established ground control points that were used to calibrate the lidar to known ground locations established throughout the entire project area. An additional independent accuracy checkpoints were collected throughout the entire project area and used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.</abstract>
		  <purpose>This project will support the 3DEP mission, the Natural Resources Conservation Service (NRCS) high-resolution elevation enterprise, and many state and local agencies.</purpose>
		  <supplinf>USGS Contract No. G16PC00022, Task Order No. 140G0221F0254, Project Name: OH Statewide Phase3 2021 B21. Contractor: Woolpert.</supplinf>
			<lidar>
				<ldrinfo>
					<ldrspec>USGS NGP Base Specifications v2022 rev A</ldrspec>
					<ldrsens>Leica Terrain Mapper</ldrsens>
					<ldrmaxnr>15</ldrmaxnr>
					<ldrnps>0.35</ldrnps>
					<ldrdens>8</ldrdens>
					<ldranps>0.35</ldranps>
					<ldradens>8</ldradens>
					<ldrfltht>2000</ldrfltht>
					<ldrfltsp>160</ldrfltsp>
					<ldrscana>40</ldrscana>
					<ldrscanr>160</ldrscanr>
					<ldrpulsr>1600</ldrpulsr>
					<ldrpulsd>5</ldrpulsd>
					<ldrpulsw>2.5</ldrpulsw>
					<ldrwavel>1064</ldrwavel>
					<ldrmpia>1</ldrmpia>
					<ldrbmdiv>0.25</ldrbmdiv>
					<ldrswatw>1456</ldrswatw>
					<ldrswato>25</ldrswato>
					<ldrgeoid>GEOID18</ldrgeoid>
				</ldrinfo>
				<ldraccur>
					<ldrchacc>0</ldrchacc>
					<rawnva>0</rawnva>
					<rawnvan>0</rawnvan>
					<clsnva>0</clsnva>
					<clsnvan>0</clsnvan>
					<clsvva>0</clsvva>
					<clsvvan>0</clsvvan>
				</ldraccur>
				<lasinfo>
					<lasver>1.4</lasver>
					<lasprf>6</lasprf>
					<laswheld>Geometrically unreliable points were identified using a combination of automated and manual techniques and subsequently classified as high or low noise and given the standard Withheld bit.</laswheld>
				  <lasolap>The overlap bit flag is not to be used for lidar point clouds intended for inclusion in 3DEP data holdings.</lasolap>
					<lasintr>16</lasintr>
					<lasclass>
						<clascode>1</clascode>
						<clasitem>Processed but not classified</clasitem>
					</lasclass>
					<lasclass>
						<clascode>2</clascode>
						<clasitem>Bare earth ground</clasitem>
					</lasclass>
					<lasclass>
						<clascode>7</clascode>
						<clasitem>Low Noise</clasitem>
					</lasclass>
					<lasclass>
						<clascode>9</clascode>
						<clasitem>Water</clasitem>
					</lasclass>
					<lasclass>
						<clascode>17</clascode>
						<clasitem>Bridge decks</clasitem>
					</lasclass>
					<lasclass>
						<clascode>18</clascode>
						<clasitem>High noise</clasitem>
					</lasclass>
					<lasclass>
						<clascode>20</clascode>
						<clasitem>Ignored ground</clasitem>
					</lasclass>
				</lasinfo>
			</lidar>
		</descript>
		<timeperd>
			<timeinfo>
				<rngdates>
					<begdate>20220316</begdate>
					<enddate>20220508</enddate>
				</rngdates>
			</timeinfo>
			<current>ground condition</current>
		</timeperd>
		<status>
			<progress>Complete</progress>
			<update>None planned</update>
		</status>
		<spdom>
		  <bounding>
		    <westbc>-84.841098</westbc>
		    <eastbc>-82.293179</eastbc>
		    <northbc>39.836104</northbc>
		    <southbc>38.820291</southbc>
		  </bounding>
		  <lboundng>			
		    <leftbc>1310920</leftbc>
		    <rightbc>2026579.99999998</rightbc>
		    <topbc>668750.000000015</topbc>
		    <bottombc>307170.000027508</bottombc>
		  </lboundng>
		</spdom>
		<keywords>
			<theme>
				<themekt>None</themekt>
				<themekey>Lidar</themekey>
				<themekey>Classified LAS</themekey>
				<themekey>Elevation Data</themekey>
				<themekey>LAS Point Cloud</themekey>
			</theme>
			<place>
				<placekt>None</placekt>
				<placekey>United States</placekey>
			      <placekey>Ohio</placekey>
			  <placekey>Butler County</placekey>
			  <placekey>Jackson County</placekey>
			  <placekey>Pickaway County</placekey>
			  <placekey>Pike County</placekey>
			  <placekey>Ross County</placekey>
			  <placekey>Vinton 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 its limitations. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.
			The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and within the limitations of the data for which it was requested and prepared, in general, and these data in particular. The related graphics are intended to aid the data user in acquiring relevant data. It is not appropriate to use the related graphics as data. Woolpert gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data are directly acquired from a Woolpert server, and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully upon Woolpert’s computer system, no warranty, expressed or implied, is made regarding the utility of the data on another system, or for general or scientific purposes; nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data.</useconst>
		<native>Microsoft Windows 10 ; ArcMap 10.7; ArcCatalog 10.7; TerraScan ver. 23; TerraModeler ver. 23; LP360.</native>
	</idinfo>
	<dataqual>
		<logic>Data covers the entire area specified for this project.</logic>
		<complete>These LAS data files include all data points collected. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. No void areas or missing data exist.</complete>
		<posacc>
		  <horizpa>		  
		  	<horizpar>This work unit was produced to meet ASPRS Positional Accuracy Standards for Digital Geospatial Data (2014) for a 0.148 (m) RMSEx / RMSEy Horizontal Accuracy Class which equates to Positional Horizontal Accuracy = +/- 0.363 (m) at a 95% confidence level.</horizpar>
		  </horizpa>
			<vertacc>
				<vertaccr>This data set was produced to meet ASPRS Positional Accuracy Standard for Digital Geospatial Data (2014) for a 10-cm RMSEz Vertical Accuracy Class.</vertaccr>      
			</vertacc>
		</posacc>
		<lineage>
			<procstep>
				<procdesc>Lidar Point Cloud Classification: The point cloud underwent a classification process to determine bare-earth points and non-ground points utilizing "first and only" as well as "last of many" lidar returns. This process determined Processed, but Unclassified (Class 1), Bare Earth Ground (Class 2), Low Noise (Class 7), Water (Class 9), Bridge Decks (Class 17), High Noise (Class 18), and Ignored Ground (Class 20). The bare-earth (Class 2 - Ground) lidar points underwent a manual QA/QC step to verify the quality of the DEM as well as a peer-based QC review. This included a review of the DEM surface to remove artifacts and ensure topographic quality. After the bare-earth surface is finalized, it is then used to generate all hydro-breaklines through a semi-automated process. All ground (Class 2) lidar data inside of the Lake Pond and Double Line Drain hydro flattening breaklines were then classified to water (Class 9) using TerraScan/LP360 macro functionality. A buffer of 0.35 meters was also used around each hydro-flattened feature to classify these ground (Class 2) points to Ignored Ground (Class 20). All Lake Pond Island and Double Line Drain Island features were checked to ensure that the ground (Class 2) points were reclassified to the correct classification after the automated classification was completed. All data was manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler. Global Mapper was used as a final check of the bare earth dataset. GeoCue was then used to create the deliverable industry-standard LAS files. Woolpert proprietary software and LP360 was used to perform final statistical analysis of the classes in the LAS files, on a per tile level to verify final classification metrics and full LAS header information.</procdesc>
			  <procdate>20231027</procdate>
			</procstep>
		</lineage>
	</dataqual>
	<spdoinfo>
		<direct>Point</direct>
	</spdoinfo>
  <spref>
    <horizsys>
      <planar>
        <gridsys>
          <gridsysn>State Plane Coordinate System 1983</gridsysn>
          <spcs>
            <spcszone>3402</spcszone>
            <lambertc>
              <stdparll>38.73333333333333</stdparll>
              <stdparll>40.03333333333333</stdparll>
              <longcm>-82.5</longcm>
              <latprjo>38.0</latprjo>
              <feast>1968500.0</feast>
              <fnorth>0.0</fnorth>
            </lambertc>
          </spcs>
        </gridsys>
        <planci>
          <plance>coordinate pair</plance>
          <coordrep>
            <absres>0.01</absres>
            <ordres>0.01</ordres>
          </coordrep>
          <plandu>Foot_US</plandu>
        </planci>
      </planar>
      <geodetic>
        <horizdn>North American Datum of 1983 (2011)</horizdn>
        <ellips>Geodetic Reference System 1980</ellips>
        <semiaxis>6378137.0</semiaxis>
        <denflat>298.257222101</denflat>
      </geodetic>
    </horizsys>
    <vertdef>
      <altsys>
        <altdatum>North American Vertical Datum of 1988 (GEOID18)</altdatum>
        <altres>0.01</altres>
        <altunits>Foot_US</altunits>
        <altenc>Explicit elevation coordinate included with horizontal coordinates</altenc>
      </altsys>
    </vertdef>
  </spref>
	<metainfo>
		<metd>20231027</metd>
		<metc>
			<cntinfo>
				<cntorgp>
					<cntorg>Woolpert</cntorg>
				</cntorgp>
				<cntaddr>
					<addrtype>mailing and physical</addrtype>
					<address>4454 Idea Center Blvd.</address>
					<city>Dayton</city>
					<state>OH</state>
					<postal>45430</postal>
					<country>USA</country>
				</cntaddr>
				<cntvoice>(937) 461-5660</cntvoice>
			</cntinfo>
		</metc>
		<metstdn>FGDC Content Standard for Digital Geospatial Metadata</metstdn>
		<metstdv>FGDC-STD-001-1998</metstdv>
	</metainfo>
</metadata>