<?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; Hydro-Flattened Bare-Earth DEM</title>
        <geoform>Raster digital data</geoform>
      </citeinfo>
    </citation>
    <descript>
    	<abstract>Product: 1.25 US Foot bare-earth raster digital elevation model (DEM) data tiles in GeoTIFF 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. DEM data was delivered as processed GeoTIFF files formatted to 53,199 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.
        Raster File Type = TIFF
        Bit Depth/Pixel Type = 32-bit float
        Raster Cell Size = 1.25-US Feet
        Interpolation or Re-sampling Technique = Triangulated Irregular Network
        Required Vertical Accuracy = 19.6 cm NVA
      </supplinf>
    </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>DEM</themekey>
      	<themekey>Elevation Data</themekey>
      	<themekey>Lidar</themekey>
      	<themekey>Model</themekey>
        <themekey>Raster</themekey>        
        <themekey>Remote Sensing</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>Datasets contain complete coverage of tiles. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. There are no void areas or missing data. The DEM is of good quality and data passes Non-Vegetated and Vegetated Vertical Accuracy specifications.</complete>
    <posacc>
      <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>Hydro-Flattened Digital Elevation Models (DEMs): Class 2 (ground) lidar points in conjunction with the hydro breaklines as well bridge breaklines were used to create a 1.25 US-Feet, hydro-flattened bare-earth raster DEM. Using automated scripting routines within ArcMap, a GeoTIFF file was created for each tile. Each surface is reviewed using Global Mapper to check for any surface anomalies or incorrect elevations found within the surface.</procdesc>
        <procdate>20231027</procdate>
      </procstep>
    </lineage>
  </dataqual>
  <spdoinfo>
    <direct>Raster</direct>
    <rastinfo>
      <rasttype>Pixel</rasttype>
    	<rowcount>1000</rowcount>
    	<colcount>1000</colcount>
    </rastinfo>
  </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>row and column</plance>
		 <coordrep>
		   <absres>1.25</absres>
		   <ordres>1.25</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>