<?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>20230510</pubdate>
			  <title>OH_StatewideP3_1_B21; Project ID: 222528 - WU222525; 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 2,317.056 square miles in Ohio.
			  Dataset Description: OH_StatewideP3_1_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 42,141 individual 1,250-US Feet x 1,250-US Feet tiles.
			  Ground Conditions: Lidar was collected from December 12, 2021, through January 12, 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>20211212</begdate>
					<enddate>20220112</enddate>
				</rngdates>
			</timeinfo>
			<current>ground condition</current>
		</timeperd>
		<status>
			<progress>Complete</progress>
			<update>None planned</update>
		</status>
		<spdom>
		  <bounding>
		    <westbc>-84.832482</westbc>
		    <eastbc>-83.203193</eastbc>
		    <northbc>40.373573</northbc>
		    <southbc>39.568754</southbc>
		  </bounding>
		  <lboundng>			
		    <leftbc>1318420.00000003</leftbc>
		    <rightbc>1770330.00000001</rightbc>
		    <topbc>865330.000000028</topbc>
		    <bottombc>579669.999973923</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>Darke County</placekey>
			  <placekey>Miami County</placekey>
			  <placekey>Montgomery County</placekey>
			  <placekey>Clark County</placekey>
			  <placekey>Madison 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.
    	Woolpert prepared the original data as set forth in the Scope of Services, in accordance with reasonable care and due diligence as set forth in this Agreement, however, due to the easily alterable nature of electronic media, files, documents, and other deliverables, Woolpert makes no warranties, either expressed or implied, with respect to the accuracy, completeness, merchantability, or fitness for any particular purpose, including, but not limited to, use of any/all data as described within this metadata file, by any user of this data. Any use will be at the end-user's sole risk.</useconst>
		<native>Microsoft Windows 10 ; ArcMap 10.7; ArcCatalog 10.7; TerraScan ver. 20; TerraModeler ver. 20; 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>20230510</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>20230510</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>