<?xml version="1.0" encoding="utf-8"?>
<metadata>
  <idinfo>
    <citation>
      <citeinfo>
        <origin>Woolpert</origin>
        <pubdate>20170131</pubdate>
        <title>Lower Maumee 2016 Lidar Hydro Flattened Bare Earth DEM</title>
        <geoform>raster digital data</geoform>
      </citeinfo>
    </citation>
    <descript>
      <abstract>Product: These are Digital Elevation Model (DEM) data for Lower Maumee 2016 Lidar as part of the required deliverables for Lower Maumee 2016 Lidar project. Class 2 (ground) lidar points in conjunction with the hydro breaklines and bridge breaklines were used to create a 2.5 feet hydro-flattened Raster DEM.
Geographic Extent: This task order requires lidar data to be acquired over 2,484 square miles of northwest Ohio that drains into Lake Erie collected at a nominal pulse spacing (NPS) of 0.7 meters. Dataset Description: Lower Maumee 2016 Lidar project called for the Planning, Acquisition, processing and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.70 meter. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.2. The data was developed based on a horizontal projection/datum of NAD83(2011) StatePlane Ohio North FIPS3401, Survey Feet and vertical datum of NAVD88 Geoid12B Survey Feet. Lidar data was delivered as flightline-extent unclassified LAS swaths, as processed Classified LAS 1.4 files, formatted to 3108 individual 5000 ft x 5000 ft tiles in NAD83(2011) StatePlane Ohio North FIPS3401, NAVD88 Geoid12B Survey Feet, as tiled Intensity Imagery, and as tiled bare earth DEMs; all tiled to the same 5000 ft x 5000 ft schema. 
   Ground Conditions: Lidar was collected in spring of 2016 by Woolpert, 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 67  ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. Additional independent accuracy checkpoints were collected (83 NVA points and 65 VVA points) and used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data. An occluded area exists at Sunoco Logistics Refinery, due to smoke from a smokestack.  The area was flown on 3 separate occasions. Sunoco Logistics Refinery location coordinates are approximately 291400 E and 4611819N in UTM 17 meters.
</abstract>
      <purpose>Data is used for: Terrain analysis, drainage studies, planning and development</purpose>
      <supplinf>Raster File Type = IMG Bit Depth/Pixel Type =32-bit float Raster Cell Size = 2.5 Sv Feet Interpolation or Resampling Technique = Triangulated Irregular Network Required Vertical Accuracy =  NVA</supplinf>
    </descript>
    <timeperd>
      <timeinfo>
        <rngdates>
          <begdate>20160413</begdate>
          <enddate>20160417</enddate>
        </rngdates>
      </timeinfo>
      <current>ground condition</current>
    </timeperd>
    <status>
      <progress>Complete</progress>
      <update>As needed</update>
    </status>
    <spdom>
      <bounding>
        <westbc>-84.397181</westbc>
        <eastbc>-82.707378</eastbc>
        <northbc>41.744991</northbc>
        <southbc>41.029383</southbc>
      </bounding>
    </spdom>
    <keywords>
      <theme>
        <themekt>None</themekt>
        <themekey>Lidar</themekey>
        <themekey>DEM</themekey>
        <themekey>Remote sensing</themekey>
        <themekey>Elevation Data</themekey>
      </theme>
      <place>
        <placekt>None</placekt>
        <placekey>United States</placekey>
        <placekey>Ohio</placekey>
      </place>
    </keywords>
    <accconst>No restrictions apply to this 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.</useconst>
  </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 raw point cloud is of good quality and data passes Non-Vegetated Vertical Accuracy specifications.</complete>
    <posacc>
      <vertacc>
        <vertaccr>LAS data covering the Lower Maumee 2016 Lidar Task Order was compared to independent survey control points to determine the NVA of the LAS Swath and of the Bare-Earth DEM. In addition, this LAS data was compared to independent VVA points. LAS Swath Non-Vegetated Vertical Accuracy (NVA) Tested 0.056 Meter Non vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using 0.029 Meter (RMSEz) x 1.96000 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines. Bare-Earth DEM Non-Vegetated Vertical Accuracy (NVA) Tested 0.056 Meter Non vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using 0.029 Meter (RMSEz) x 1.96000 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines.</vertaccr>
        <qvertpa>
          <vertaccv>0.056 Meter</vertaccv>
          <vertacce>Raw Swath Non-Vegetated Vertical Accuracy (NVA) Tested 0.056 Meter Non-Vegetated Vertical Accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using (RMSEz)  x 1.96000 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines and tested against the TIN using all points.</vertacce>
        </qvertpa>
        <qvertpa>
          <vertaccv>0.029 Meter</vertaccv>
          <vertacce>Bare-Earth DEM Non-Vegetated Vertical Accuracy (NVA) Tested 0.029 Meter Non-Vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using (RMSEz) x 1.96000 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines and tested against the DEM.</vertacce>
        </qvertpa>
        <qvertpa>
          <vertaccv>0.165 Meter</vertaccv>
          <vertacce>Vegetated Vertical Accuracy (VVA) Tested 0.165 Meter at the 95th percentile reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines and tested against the DEM. VVA Errors larger than 95th percentile include:
Point 3019, Easting 1554156.300, Northing 701914.006, Z-Error 0.277 Meter
Point 3023, Easting 1685054.505, Northing 527030.833, Z-Error 0.170 Meter
Point 3042, Easting 1776006.824, Northing 640100.464, Z-Error 0.166 Meter
</vertacce>
        </qvertpa>
      </vertacc>
    </posacc>
    <lineage>
      <procstep>
        <procdesc>Hydro Flattened Raster DEM Process: Class 2 (ground) lidar points in conjunction with the hydro breaklines as well bridge breaklines were used to create a 2.5 ft hydro-flattened Raster DEM. Using automated scripting routines within ArcMap, an ERDAS Imagine IMG 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>20160413</procdate>
        <proctime>1200</proctime>
      </procstep>
    </lineage>
  </dataqual>
  <spdoinfo>
    <direct>Raster</direct>
    <rastinfo>
      <rasttype>Pixel</rasttype>
      <rowcount>2000</rowcount>
      <colcount>2000</colcount>
    </rastinfo>
  </spdoinfo>
  <spref>
    <horizsys>
      <planar>
        <mapproj>
          <mapprojn>NAD 1983 2011 StatePlane Ohio North FIPS 3401 Ft US</mapprojn>
          <lambertc>
            <stdparll>40.43333333333333</stdparll>
            <stdparll>41.7</stdparll>
            <longcm>-82.5</longcm>
            <latprjo>39.66666666666666</latprjo>
            <feast>1968500.0</feast>
            <fnorth>0.0</fnorth>
          </lambertc>
        </mapproj>
        <planci>
          <plance>row and column</plance>
          <coordrep>
            <absres>2.5</absres>
            <ordres>2.5</ordres>
          </coordrep>
          <plandu>Ft US</plandu>
        </planci>
      </planar>
      <geodetic>
        <horizdn>D NAD 1983 2011</horizdn>
        <ellips>GRS 1980</ellips>
        <semiaxis>6378137.0</semiaxis>
        <denflat>298.257222101</denflat>
      </geodetic>
    </horizsys>
    <vertdef>
      <altsys>
        <altdatum>North American Vertical Datum of 1988(GEOID12B)</altdatum>
        <altres>0.000100</altres>
        <altunits>Ft US</altunits>
        <altenc>Explicit elevation coordinate included with horizontal coordinates</altenc>
      </altsys>
    </vertdef>
  </spref>
  <distinfo>
    <distrib>
      <cntinfo>
        <cntorgp>
          <cntorg>USGS/NGTOC</cntorg>
        </cntorgp>
        <cntaddr>
          <addrtype>mailing and physical address</addrtype>
          <address>1400 Independence Rd.</address>
          <city>Rolla</city>
          <state>MO</state>
          <postal>65401</postal>
          <country>USA</country>
        </cntaddr>
        <cntvoice>(573) 308-3587</cntvoice>
        <cntfax>Unknown</cntfax>
        <hours>Unknown</hours>
      </cntinfo>
    </distrib>
    <resdesc>Downloadable Data</resdesc>
    <distliab>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, Inc. 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.</distliab>
    <availabl>
      <timeinfo>
        <sngdate>
          <caldate>unknown</caldate>
          <time>unknown</time>
        </sngdate>
      </timeinfo>
    </availabl>
  </distinfo>
  <metainfo>
    <metd>20170131</metd>
    <metc>
      <cntinfo>
        <cntorgp>
          <cntorg>Woolpert</cntorg>
        </cntorgp>
        <cntaddr>
          <addrtype>mailing and physical address</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>
        <cntfax>(937) 461-0743 </cntfax>
        <hours>8:00 a.m. to 5:00 p.m. Eastern Time</hours>
      </cntinfo>
    </metc>
    <metstdn>FGDC Content Standards for Digital Geospatial Metadata</metstdn>
    <metstdv>FGDC-STD-001-1998</metstdv>
    <mettc>local time</mettc>
    <metsi>
      <metscs>Unclassified</metscs>
      <metsc>Unclassified</metsc>
      <metshd>Unclassified</metshd>
    </metsi>
  </metainfo>
</metadata>