Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC) 201309 Raster Charleston, SC NOAA's Ocean Service, Coastal Services Center (CSC) http://www.csc.noaa.gov/slr http://www.csc.noaa.gov These data were created as part of the National Oceanic and Atmospheric Administration (NOAA) Coastal Services Center's efforts to create an online mapping viewer called the Sea Level Rise and Coastal Flooding Impacts Viewer. It depicts potential sea level rise and its associated impacts on the nation's coastal areas. The purpose of the mapping viewer is to provide coastal managers and scientists with a preliminary look at sea level rise (slr) and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios. The Sea Level Rise and Coastal Flooding Impacts Viewer may be accessed at: http://www.csc.noaa.gov/slr This metadata record describes the North Carolina digital elevation model (DEM), which is a part of a series of DEMs produced for the National Oceanic and Atmospheric Administration Coastal Services Center's Sea Level Rise and Coastal Flooding Impacts Viewer described above. This DEM includes the best available lidar known to exist at the time of DEM creation that met project specifications for North Carolina, which includes the coastal areas of the counties of Currituck, Dare, Camden, Pasquotank, Perquimans, Chowan, Gates, Northampton, Hertford, Bertie, Halifax, Washington, Martin, Edgecombe, Pitt, Greene, Lenoir, Jones, Duplin, Sampson, Bladen, Tyrrell, Hyde, Beaufort, Pamlico, Craven, Carteret, Onslow, Pender, New Hanover, Brunswick, Columbus. The DEM was produced from multiple LiDAR datasets furnished by the North Carolina Division of Emergency Management, Floodplain Mapping Program. More information about the source data sets can be found in Supplemental Information. Hydrographic breaklines were delineated from LiDAR intensity imagery generated from the LiDAR datasets. The final DEM is hydro flattened such that water elevations are less than or equal to 0 meters. The DEM is referenced vertically to the North American Vertical Datum of 1988 (NAVD88) with vertical units of meters and horizontally to the North American Datum of 1983 (NAD83). The resolution of the DEM is approximately 10 meters. The NOAA Coastal Services Center has developed high-resolution digital elevation models (DEMs) for use in the Center's Sea Level Rise and Coastal Flooding Impacts internet mapping application. These DEMs serve as source datasets used to derive data to visualize the impacts of inundation resulting from sea level rise along the coastal United States and its territories. Further information or to download the elevation datasets used to construct this DEM may be accessed at: http://www.ncfloodmaps.com/ The following data sets were used to develop the DEM: 1. North Carolina Division of Emergency Management, Floodplain Mapping Program LIDAR a. 2004 LIDAR Acquisition: Bladen County, Brunswick County, Columbus County, Duplin County, Lenoir County, New Hanover County, Onslow County, Pender County, Sampson County b. 2005 LIDAR Acquisition: Bertie County, Camden County, Carteret County, Chowan County, Craven County, Currituck County, Dare County, Edgecomb County, Gates County, Greene County, Halifax County, Hertford County, Hyde County, Martin County, Northampton County, Pamlico County, Pasquotank County, Perquimans County, Pitt County, Tyrell County, Washington County c. 2006 LIDAR Acquisition: Jones County 2. Hydrographic breaklines are supplied with the LIDAR data from the North Carolina Division of Emergency Management. 3. Panchromatic 1-meter orthoimagery for each county's respective LIDAR dataset. 20120814 201306 ground condition Complete None planned -79.072297 -75.398996 36.553039 33.751912 ISO 19115 Topic Category elevation None Bathymetry/Topography elevation Digital Elevation Model DEM lidar inundation flooding lidar topography sea level rise None US North Carolina Beaufort County Bertie County Bladen County Brunswick County Camden County Carteret County Chowan County Columbus County Craven County Currituck County Dare County Duplin County Edgecomb County Gates County Greene County Halifax County Hertford County Hyde County Jones County Lenoir County Martin County New Hanover County Northampton County Onslow County Pamlico County Pasquotank County Pender County Perquimans County Pitt County Sampson County Tyrrell County Washington County None The dataset is provided as is, without warranty to its performance, merchantable state, or fitness for any particular purpose. The entire risk associated with the results and performance of this dataset is assumed by the user. This dataset should be used strictly as a planning reference and not for navigation, permitting, or other legal purposes. Acknowledgment of the NOAA Coastal Services Center as a data source would be appreciated in products developed from these data, and such acknowledgment as is standard for citation and legal practices for data source is expected. Data covers the tile scheme provided for the project area. Elevation data checked for anomalous elevation values outside expected range. A visual qualitative check was performed to ensure data completeness. All available lidar data known at the time of DEM creation that meets project specifications has been used to develop the DEM. Known data gaps may exist where lidar coverage was incomplete. The DEM is derived from the source lidar data. Horizontal accuracy testing is not performed on the DEM. Lidar source data assumed to meet 1 meter horizontal accuracy. The DEM is derived from the source lidar data. Vertical accuracy is not tested on the DEM. Project specifications require all source lidar data used in constructing the DEM to meet FEMA Specifications for Flood Hazard Mapping. The data sets listed below were used to develop the DEM. For further information about them or to download the data, please see the link to the data sets in the Supplemental Information field. 1. North Carolina Division of Emergency Management, Floodplain Mapping Program Lidar: a. 2004 LIDAR Acquisition: Bladen County, Brunswick County, Columbus County, Duplin County, Lenoir County, New Hanover County, Onslow County, Pender County, Sampson County b. 2005 LIDAR Acquisition: Bertie County, Camden County, Carteret County, Chowan County, Craven County, Currituck County, Dare County, Edgecomb County, Gates County, Greene County, Halifax County, Hertford County, Hyde County, Martin County, Northampton County, Pamlico County, Pasquotank County, Perquimans County, Pitt County, Tyrell County, Washington County c. 2006 LIDAR Acquisition: Jones County 2. Hydrographic breaklines are supplied with the LIDAR data from the North Carolina Division of Emergency Management. 3. Panchromatic 1-meter orthoimagery for each county's respective LIDAR dataset. 2012 Hydrographic breaklines provided by the NC Division of Emergency Management were reviewed against panchromatic 1-meter imagery for each respective county and bare earth DEMs. Hydrographic features not captured by existing breaklines were extracted based on the bare earth DEM as 2D datasets. 2012 Bare earth LiDAR points are exported from ASCII files into an Arc Geodatabase (GDB) in multipoint format. Hydro breaklines are assigned an elevation of -0.5 meters and loaded into an Arc GDB. An ESRI Terrain is generated from these inputs. 2012 The ESRI Terrain is converted to a DEM in Erdas image file format with a cell size of 3 meters. The DEM is reviewed in Global Mapper for incorrect elevations and artifacts that are introduced from source inputs or during the raster creation process. Corrections are applied to the DEMs and reprocessed for review. 2012 All DEMs are loaded into Global Mapper for the last review. During this last review, an analyst checks to ensure full, complete coverage, no issues along DEM boundaries, DEMs seamlessly edge-match, and that there are no remaining processing artifacts in the dataset. Once approved, DEMs are re-projected to the NAD83 geographic coordinate system. 2012 For data distribution purposes, NOAA CSC converted the cell resolution of the DEM from 3 meters to 10 meters. 2013 Raster Grid Cell 31182 40891 1 0.0000001 0.0000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222101 North American Vertical Datum of 1988 0.001 meters Explicit elevation coordinate included with horizontal coordinates NOAA Coastal Services Center mailing and physical

2234 South Hobson Ave.

Charleston SC 29405-2413 843-740-1202 csc.info@noaa.gov Downloadable Data Any conclusions drawn from the analysis of this information are not the responsibility of the NOAA Coastal Services Center or its partners. 201309 NOAA Coastal Services Center mailing and physical

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Charleston SC 29405-2413 843-740-1202 csc.info@noaa.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998