<?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>Hope Morgan, NC Emergency Management, GIS Manager - GTM</origin>
        <pubdate>20171002</pubdate>
        <title>2016 LiDAR Acquisition and Associated Products for Phase Four Counties in North Carolina</title>
        <geoform>vector data</geoform>
      </citeinfo>
    </citation>
    <descript>
      <abstract>The hydro flattened breakline data was developed specific to the 2016 Phase Four project area consisting of 20 North Carolina counties. Base data used for the development of the breaklines included aerial imagery of varying collection dates from the State of North Carolina, for reference, and the LiDAR data collected for the project.  The base LiDAR data was collected by a single aerial vendor on ESP team between February 27, 2016 and April 17, 2016 and between December 9, 2016 and February 21 of 2017 using Geiger-mode Avalanche Photodiode (GmAPD) sensors. The aerial vendor on the ESP team was Harris Corporation (Harris).Two GmAPD (Geiger-mode) sensors (serial numbers 002 and 003) were used for the data collection of LiDAR data at a 0.35 meter nominal post spacing (NPS). The following counties or portions of counties were collected in the February through April, 2016 mobilization: Alleghany, Stokes, Surry, Cleveland, Gaston, Mecklenburg, Cabarrus, Stanly, Union, and Anson. The following counties or portions of counties we collected in the December, 2016 through February, 2017 mobilization: Cleveland, Gaston, Mecklenburg, Cabarrus, Stanly, Wilkes, Yadkin, Forsyth, Alexander, Catawba, Iredell, Davie, Rowan, and Davidson. All data was collected during leaf-off conditions. Ground survey support for the project included the establishment of GPS base stations and the collection of control points used for calibration. All data was delivered in the North Carolina State Plane Coordinate System, with a horizontal datum of NAD83 (2011), vertical datum of NAVD88 (Geoid 12B), in US Survey Feet. Data was delivered tiled to a 2,500 foot by 2,500 foot tiling scheme unless otherwise specified in this product description. All LiDAR was delivered in LASer (LAS) version 1.4 standard format. Products for this project derived from the source LiDAR included: intensity images in GeoTIFF format, hydro-flattening breaklines in ESRI File Geodatabase format, Digital Elevation Models (DEMs) in TIF format, ESRI Terrain Datasets (by county) in ESRI File Geodatabase format, product and project-level metadata, and project reports to include the Report of Survey, Post-Acquisition Report, and Project Report. All LiDAR and derivative products for this project met the specifications stipulated in Delivery Order 22, the NC LiDAR Standard, and the USGS minimum standards for QL1 LiDAR data. This project was a joint effort between NC Emergency Management, NC Geodetic Survey, and the NCDOT. The following people served as the main representatives for each stakeholder: NC Emergency Management- Hope Morgan (primary contact) and John Dorman; NC Geodetic Survey- Gary Thompson and Watson Ross; NCDOT- Keith Johnston and Marc Swartz, and the United States Geological Survey (USGS.</abstract>
      <purpose>The purpose of this project was to update existing LiDAR data, originally collected between 2000 and 2005, with more accurate and clearly defined LiDAR data utilizing the latest in sensor technology. Although created for the North Carolina Floodplain Mapping Program for specific use in the engineering aspects of floodplain delineation, the data were also developed to address the elevation data requirements of the broader geospatial community. The North Carolina Floodplain Mapping Program was established in response to the extensive damage caused by Hurrican Floyd in 1999.</purpose>
      <supplinf>NCEM GTM Contract No. 286-000030 ESP CONTRACTOR: ESP Associates SUBCONTRACTORS:Surdex Corporation. All hydro flattened breakline processing was completed by the prime contractor and Surdex Corporation. Breakline File Type = SHP Breakline Elevation Units = Feet Downhill Treatment Applied = Monotonic Type of Hydro Treatment Required = Hydro-flattened 
      </supplinf>
    </descript>
    <timeperd>
      <timeinfo>
        <rngdates>
          <begdate>20160227</begdate>
          <enddate>20170221</enddate>
        </rngdates>
      </timeinfo>
      <current>ground condition</current>
    </timeperd>
    <status>
      <progress>Complete</progress>
      <update>None planned</update>
    </status>
    <spdom>
      <bounding>
        <westbc>-81.796371</westbc>
        <eastbc>-79.846639</eastbc>
        <northbc>36.607426</northbc>
        <southbc>34.819963</southbc>
      </bounding>
    </spdom>
    <keywords>
      <theme>
        <themekt>None</themekt>
        <themekey>Model</themekey>
        <themekey>Breaklines</themekey>
        <themekey>Elevation Data</themekey>
        <themekey>Lidar</themekey>
         <themekey>Geiger</themekey>
          <themekey>Hydrology</themekey>
      </theme>
      <place>
        <placekt>None</placekt>
        	<placekey>North Carolina</placekey>
        	<placekey>Alleghany County</placekey>
        	<placekey>Surry County</placekey>
        	<placekey>Stokes County</placekey>
        	<placekey>Wilkes County</placekey>
        	<placekey>Yadkin County</placekey>
        	<placekey>Forsyth County</placekey>
        	<placekey>Alexander County</placekey>
        	<placekey>Iredell County</placekey>
        	<placekey>Davie County</placekey>
        	<placekey>Davidson County</placekey>
        	<placekey>Catawba County</placekey>
        	<placekey>Rowan County</placekey>
        	<placekey>Lincoln County</placekey>
        	<placekey>Cabarrus County</placekey>
        	<placekey>Cleveland County</placekey>
        	<placekey>Gaston County</placekey>
        	<placekey>Mecklenburg County</placekey>
        	<placekey>Union County</placekey>
        	<placekey>Anson County</placekey>
        	<placekey>Stanly 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 North Carolina Emergency Management and the U.S. Geological Survey would be appreciated for products derived from these data.</useconst>
    <ptcontac>
    	<cntinfo>
    		<cntorgp>
    			<cntorg>ESP Associates</cntorg>
    			<cntper>Harold Rempel</cntper>
    		</cntorgp>
    		<cntpos>Project Manager</cntpos>
    		<cntaddr>
    			<addrtype>mailing</addrtype>
    			<address>P.O. Box 7030</address>
    			<city>Charlotte</city>
    			<state>NC</state>
    			<postal>28241</postal>
    		</cntaddr>
    		<cntvoice>803-835-0851</cntvoice>
    		<cntemail>hrempel@espassociates.com</cntemail>
    	</cntinfo>
    </ptcontac>
    <ptcontac>
    	<cntinfo>
    		<cntorgp>
    			<cntorg>ESP Associates</cntorg>
    			<cntper>Jamey Gray</cntper>
    		</cntorgp>
    		<cntpos>NC PLS: L-4778</cntpos>
    		<cntaddr>
    			<addrtype>mailing</addrtype>
    			<address>P.O. Box 7030</address>
    			<city>Charlotte</city>
    			<state>NC</state>
    			<postal>28241</postal>
    		</cntaddr>
    		<cntvoice>803-835-0851</cntvoice>
    		<cntemail>jgray@espassociates.com</cntemail>
    	</cntinfo>
    </ptcontac>
<datacred>The ESP Team, consisting of ESP Associates, Surdex Corporation, and Harris Corporation, performed all data collection, ground support, and data processing for this project.</datacred>
<native>MicroStation Connect Version 10; TerraScan Version 17; ESRI ArcGIS 10.4.1, Windows 7 Operating System, ESP Analyst, ESP Utilities</native>
  </idinfo>
  <dataqual>
    <logic>All data covers the project area, tile to tile with no gaps in coverage</logic>
    <complete>All vector files were inspected to ensure that they conform to the project specifications, specified file naming conventions, that they load in their correct geographic position, and that they are readable</complete>
    <lineage>
      <procstep>
      	<procdesc>Class 2 (ground) lidar points were used to display a TIN surface within ESP Analyst. The TIN surface was then used to heads-up digitize 3D breaklines of inland streams and rivers equal to or greater than 100 feet in width and inland, closed water bodies 2 acres or greater in footprint. Islands equal to or greater than 1 acre in area were collected as polygons. For closed, inland water bodies a single elevation was attributed to the polygon based on the average of bank to water edge elevations. Elevation values were attributed to all streams and rivers using ESP Analyst. All classifications in the lidar data contained within collected hydro breakline features were then classified to water (ASPRS Class 9) using ESP Utilities, with the exception of islands meeting the minimum map unit of 1 acre, which were classified to ground and vegetation if applicable. A buffer of 1 foot was used to reclassify ground points around the hydro-flattened feature to breakline proximity (Class 10). The hydro flattened breakline files were exported from ESP Analyst to ESRI shapefile format then imported and converted to ESRI File-Geodatabase format using ESRI conversion tools. Breaklines are reviewed against the LiDAR TINS, LiDAR intensity images, and NC aerial images to verify completeness of capture. Enforcing the flatness, monotonicity, and connectivity of hydro features will create some variation in areas between the brealines and the surface derived from LiDAR ground points.Breakline topology, completeness,and attribution was reviewd using ESRI ArcMap and Global Mapper</procdesc>
        <procdate>2017</procdate>
      </procstep>
    </lineage>
  </dataqual>
  <spdoinfo>
    <direct>Vector</direct>
  </spdoinfo>
  <spref>
    <horizsys>
      	<planar>
        	<gridsys>
        		<gridsysn>State Plane Coordinate System 1983</gridsysn>
        		<spcs>
        			<spcszone>3200</spcszone>
        			<lambertc>
        				<stdparll>34.33333333</stdparll>
        				<stdparll>36.16666667</stdparll>
        				<longcm>36.16666667</longcm>
        				<latprjo>33.75000000</latprjo>
        				<feast>2000000.00261667</feast>
        				<fnorth>0.0</fnorth>
        			</lambertc>
        		</spcs>
        	</gridsys>
        	<planci>
        		<plance>coordinate pair</plance>
        		<coordrep>
        			<absres>0.01</absres>
        			<ordres>0.01</ordres>
        		</coordrep>
        		<plandu>feet</plandu>
        	</planci>
        </planar>
        <geodetic>
        	<horizdn>North American Datum of 1983  (2011)</horizdn>
        	<ellips>Geodetic Reference System 80</ellips>
        	<semiaxis>6378137</semiaxis>
        	<denflat>298.257222101</denflat>
        </geodetic>
	</horizsys>
	<vertdef>
		<altsys>
			<altdatum>North American Vertical Datum of 1988 GEOID12B</altdatum>
			<altres>0.01</altres>
			<altunits>feet</altunits>
			<altenc>Explicit elevation coordinate included with horizontal coordinates</altenc>
		</altsys>
	</vertdef>
</spref>
  <metainfo>
    <metd>20171003</metd>
    <metc>
      <cntinfo>
        <cntorgp>
          <cntorg>NC Emergency Management</cntorg>
        </cntorgp>
        <cntaddr>
          <addrtype>mailing</addrtype>
          <address>NCNG Campus- Bowers Building, 4105 Reedy Creek Road</address>
          <city>Raleigh</city>
          <state>NC</state>
          <postal>27607</postal>
          <country>USA</country>
        </cntaddr>
        <cntvoice>919-825-2336</cntvoice>
        <cntfax>919-715-0408</cntfax>
        <cntemail>Hope.Morgan@ncdps.gov</cntemail>
      </cntinfo>
    </metc>
    <metstdn>FGDC Content Standard for Digital Geospatial Metadata</metstdn>
    <metstdv>FGDC-STD-001-1998</metstdv>
  </metainfo>
</metadata>