NCEI (formerly NGDC)
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Morehead City, North Carolina 1/3 Arc-second MHW Coastal Digital Elevation Model

browse graphicPerspective view of DEM
NOAA's National Geophysical Data Center (NGDC) is building high-resolution digital elevation models (DEMs) for select U.S. coastal regions. These integrated bathymetric-topographic DEMs are used to support tsunami forecasting and modeling efforts at the NOAA Center for--> Tsunami Research, Pacific Marine Environmental Laboratory (PMEL). The DEMs are part of the tsunami forecast system SIFT (Short-term Inundation Forecasting for Tsunamis) currently being developed by PMEL for the NOAA Tsunami Warning Centers, and are used in the MOST (Method of Splitting Tsunami) model developed by PMEL to simulate tsunami generation, propagation, and inundation. Bathymetric, topographic, and shoreline data used in DEM compilation are obtained from various sources, including NGDC, the U.S. National Ocean Service (NOS), the U.S. Geological Survey (USGS), the Canadian Hydrographic Service (CHS), the Puget Sound Lidar Consortium (PSLC), the Joint Airborne Lidar Bathymetry
Technical Center of Expertise (JALBTCX), Canadian Digital Elevation Data (CDED) and other international, federal, state, and local government agencies, academic institutions, and private companies. DEMs are referenced to the vertical tidal datum of Mean High Water (MHW) and horizontal datum of World Geodetic System 1984 (WGS 84). Grid spacings for the DEMs range from 1/3 arc-second (~10 meters) to 3 arc-seconds (~30 meters).
Cite this dataset when used as a source.
Search Data
  • Map Interface (search)
    Graphic geo-spatial search tool for locating completed and planned DEMs.
Download Data
Distribution Formats
  • ESRI Arc ASCII (Version: 1)
    • File Specification: ASCII text version of ESRI ArcGIS raster format
    • File Compression: WINZIP
  • netCDF (Version: 4 Classic)
Distributor DEM Information
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
dem.info@noaa.gov
Dataset Point of Contact DEM Information
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
dem.info@noaa.gov
General Documentation
Associated Resources
Date(s)
  • publication: 2011-04-15
Edition: First
Data Presentation Form: mapDigital
Dataset Progress Status Complete
Data Update Frequency: As needed
Purpose: Developed for the Pacific Marine Environmental Laboratory (PMEL), NOAA Center for Tsunami Research program in support of NOAA's tsunami forecasting and warning efforts.
Use Limitations
  • Produced by the NOAA National Geophysical Data Center. Not subject to copyright protection within the United States.
  • While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
Originator(s)
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Publisher(s)
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Time Period: 1869-01-01 to 2011-01-01
Spatial Reference System: urn:ogc:def:crs:EPSG::4326
Spatial Bounding Box Coordinates:
N: 35.57
S: 34.37
E: -76.00
W: -77.27
Theme keywords Global Change Master Directory (GCMD) Science and Services Keywords
  • Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
  • Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry
  • Earth Science > Oceans > Bathymetry/Seafloor Topography > Water Depth
  • Earth Science > Land Surface > Topography > Terrain Elevation > Topographical Relief Maps
  • Earth Science > Oceans > Coastal Processes > Coastal Elevation
Uncontrolled
  • Coastal Relief
  • Gridded elevations
  • Integrated bathymetry and topography
Global Change Master Directory (GCMD) Science and Services Keywords
  • DATA ANALYSIS AND VISUALIZATION > GEOGRAPHIC INFORMATION SYSTEMS > WEB-BASED GEOGRAPHIC INFORMATION SYSTEMS
  • DATA MANAGEMENT/DATA HANDLING > DATA SEARCH AND RETRIEVAL
  • DATA ANALYSIS AND VISUALIZATION > VISUALIZATION/IMAGE PROCESSING
Global Change Master Directory (GCMD) Science and Services Keywords
  • DATA ANALYSIS AND VISUALIZATION > GEOGRAPHIC INFORMATION SYSTEMS > WEB-BASED GEOGRAPHIC INFORMATION SYSTEMS
  • DATA MANAGEMENT/DATA HANDLING > DATA SEARCH AND RETRIEVAL
  • DATA ANALYSIS AND VISUALIZATION > VISUALIZATION/IMAGE PROCESSING
Global Change Master Directory (GCMD) Science and Services Keywords
  • DATA ANALYSIS AND VISUALIZATION > GEOGRAPHIC INFORMATION SYSTEMS > WEB-BASED GEOGRAPHIC INFORMATION SYSTEMS
  • DATA MANAGEMENT/DATA HANDLING > DATA SEARCH AND RETRIEVAL
  • DATA ANALYSIS AND VISUALIZATION > VISUALIZATION/IMAGE PROCESSING
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Platform keywords Global Change Master Directory (GCMD) Platform Keywords
  • Models/Analyses > DEM > Digital Elevation Model
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Continent > North America > United States of America > North Carolina
  • Ocean > Atlantic Ocean
  • Vertical Location > Land Surface
  • Vertical Location > Sea Floor
Uncontrolled
  • Morehead City
  • Beaufort
  • Atlantic Beach
  • Pamlico Sound
Project keywords Global Change Master Directory (GCMD) Science and Services Keywords
  • OneStop
Global Change Master Directory (GCMD) Project Keywords
  • ICSU-WDS > International Council for Science - World Data System
Data Resolution keywords Global Change Master Directory (GCMD) Horizontal Data Resolution Keywords
  • 1 meter - < 30 meters
Global Change Master Directory (GCMD) Vertical Data Resolution Keywords
  • < 1 meter
Use Constraints No constraint information available
Fees Fee information not available.
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Lineage information for: dataset
Processor
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Processing Steps
  • 2011-01-15T00:00:00 - All datasets obtained by NGDC were converted to common horizontal and vertical datums of NAD 83/WGS 84 geographic and NAVD 88, respectively, using FME or ArcGIS. They were also converted to common file format, ESRI point shapefiles or digital rasters, for visualization and inspection.
  • 2011-02-10T00:00:00 - Datasets were visually inspected with ArcGIS and QT Modeler for identification and editing of data anomalies. Datasets were then compared with overlapping datasets to ensure data consistency.
  • 2011-03-05T00:00:00 - xyz files of the bathymetric data were surfaced using GMT's 'surface' tool onto a 1/3 arc-second grid that interpolated to fill empty cells. Points extracted every 10 meters along the coastline were also included to ensure that the bathymetric grid reached zero at the coast. The resulting Arc ASCII grid was imported into ArcGIS and clipped to the coastline to remove values over land.
  • 2011-03-20T00:00:00 - xyz files for each input dataset were gridded using MB-System's 'mbgrid' tool, which utilizes a high-tension spline interpolation method to fill grid cells with no input elevation values. Preferential weighting was given to more recent, higher-accuracy datasets. Gridding was performed in quadrants, each with a 5% data buffer. The grids were imported in ArcGIS and seamlessly merged to create the final DEM.
  • 2011-03-28T00:00:00 - The DEM was quantitatively evaluated by converting to UTM-zone coordinates (units of meters horizontally and vertically) and then creating a slope grid to identify gridding artifacts in the DEM. A conversion grid was created using VDatum points to convert the NAVD 88 Port Townsend DEM to MHW.
Processing Environment Native Dataset Environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2.4.1420
Source Datasets
  • NOS Hydrographic Surveys
    • NOS Hydrographic Survey Database (download)
      Digital database of NOS hydrographic surveys that date back to the late 19th century.
    • Description of Source: Source Contribution: hydrographic surveys downloaded from web site. ; Source Type: online
    • Temporal extent used: 1869-01-01 to 2003-01-01
  • Gridded Multibeam and DEM
    • Multibeam Bathymetry and DEM (offlineAccess)
      Gridded Multibeam and Singlebeam sonar
    • Description of Source: Source Contribution: Gridded multibeam and singlebeam sonar ; Source Type: postal service
    • Temporal extent used: 2005-01-01 to 2005-01-01
  • USGS NED topography
    • USGS National Elevation Dataset (download)
      Digital database of U.S. topography, in raster form (DEM)
    • Description of Source: Source Contribution: Topographic DEM ; Source Type: online
    • Temporal extent used: 1999-01-01 to 2009-01-01
  • USACE Bathymetric Topographic Lidar
    • USACE Bathymetric Topographic Lidar (download)
      Combined bathymetric and topographic lidar data for the East Coast shoreline
    • Description of Source: Source Contribution: Combined bathymetry and topography lidar. ; Source Type: online
    • Temporal extent used: 2004-01-01 to 2004-01-01
  • USACE Bathymetric Surveys provided by Wilmington District
    • USACE - Wilmington District (download)
      USACE hydrographic and bathymetric surveys
    • Description of Source: Source Contribution: bathymetric surveys provided by USACE, Wilmington District ; Source Type: online
    • Temporal extent used: 2002-01-01 to 2011-01-01
  • NCDEM-FPMP Topographic LiDAR
    • North Carolina Floodplain Mapping Program (download)
      web site for accessing information and data
    • Description of Source: Source Contribution: topographic lidar ; Source Type: on web
    • Temporal extent used: Unknown to
  • VDatum software v. 2.3.2
    • VDatum (download)
      Vertical Datum Transformation tool
    • Description of Source: Source Contribution: vertical datum transformation tool ; Source Type: online
    • Temporal extent used: Unknown to
  • VDatum software v. 2.3.2
    • VDatum (download)
      Vertical Datum Transformation tool
    • Description of Source: Source Contribution: vertical datum transformation tool ; Source Type: online
    • Temporal extent used: Unknown to
  • VDatum software v. 2.3.2
    • VDatum (download)
      Vertical Datum Transformation tool
    • Description of Source: Source Contribution: vertical datum transformation tool ; Source Type: online
    • Temporal extent used: Unknown to
Acquisition Information (collection)
Instrument
Platform
  • Digital Elevation Model
  • Digital Elevation Models
Operation
  • Tsunami Inundation Gridding Project
Last Modified: 2017-03-29
For questions about the information on this page, please email: dem.info@noaa.gov