Bermuda 1 arc-second Coastal Digital Elevation Model

browse graphicArcGIS Hillshade DEM
The 1 arc-second Bermuda DEM will be used to support NOAA's tsunami forecast system and for tsunami inundation modeling. This DEM encompasses the islands of Bermuda and the adjacent off-shore coastal area.
Cite this dataset when used as a source.
  • ID not available.
gov.noaa.ngdc.mgg.dem:5010
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Distribution Formats Format not available
    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
    Time Period 1993-01-01 to 2012-12-31
    Spatial Reference System urn:ogc:def:crs:EPSG::4326urn:ogc:def:crs:EPSG::5715
    Spatial Bounding Box Coordinates
    N: 32.55
    S: 32.17
    E: -64.51
    W: -65.06
    Spatial Coverage Map
    General Documentation
    Associated Resources
    Publication Dates
    • publication: 2013-11-20
    Edition First
    Data Presentation Form mapDigital
    Dataset Progress Status Complete - production of the data has been completed
    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.
    Originators
    • 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
    Custodians
    • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
    Publishers
    • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
    Theme keywords Global Change Master Directory (GCMD) Science 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
    • 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
    Platform keywords Global Change Master Directory (GCMD) Platform Keywords
    • Models/Analyses > DEM > Digital Elevation Model
    Place keywords Global Change Master Directory (GCMD) Location Keywords
    • Ocean > Atlantic Ocean > North Atlantic Ocean > Bermuda
    • Vertical Location > Land Surface
    • Vertical Location > Sea Floor
    Uncontrolled
    • Bermuda
    • Atlantic Ocean
    Project keywords Global Change Master Directory (GCMD) Project Keywords
    • ICSU-WDS > International Council for Science - World Data System
    • NOAA OneStop Project
    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 - < 10 meters
    Keywords
      Use Constraints No constraint information available
      Access Constraints
      • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
      Fees Fee information not available.
      Lineage information for: dataset
      Processing Steps
      • 2013-11-01T00:00:00 - All data obtained by NGDC were converted to a common horizontal reference frame (WGS84) using the Proj4 Cartographic Projections Library. All bathymetry data were converted to MSL using single values offsets between various tidal datums based on information obtained from the Government of Bermuda, Ministry of Environment and Planning. The topographic data were left referenced to Bermuda Ordinance Datum (OD); the offset between MSL and the OD is approximately 0.9m. It was assumed the magnitude of this difference was less than the vertical accuracy associated with the data and spatial resolution of the grids.
      • 2013-11-01T00:00:00 - Datasets were visually inspected with ArcGIS, QT Modeler and MB-System for identification and editing of data anomalies, including but not limited to inconsistencies between overlapping or adjacent datasets, 'noisy' data, etc.
      • 2013-11-01T00:00:00 - All data were converted to ASCII XYZ files. A 1 arc-second bathymetric 'pre-surface' grid was generated using a tensioned spline algorithm within GMT's 'surface' utility that interpolated depth values to areas where data were sparse and/or nonexistent. The bathymetric 'pre-surface' was then imported into ArcGIS and clipped to the coastline of Bermuda to remove values over land. The clipped 'pre-surface' was then converted to ASCII XYZ point data.
      • 2013-11-01T00:00:00 - The final integrated 1 arc-second topo-bathy DEM was created using GMT's 'blockmedian' and 'surface' utilities. The topographic spot heights and bathymetric surface points were used as source datasets in the spline gridding algorithm.
      • 2013-11-01T00:00:00 - The DEM was qualitatively evaluated to identify any artifacts that may have been introduced during the gridding process. If necessary, the data were edited and the gridding routine was re-run. Once the DEM was deemed suitable, it was compared to nautical charts to ensure data consistency.
      Source Datasets
      • Data table with established relationships between various vertical datums
        • Sounding depths digitized from various Admiralty Charts of Bermuda
          • Bathymetric lidar of Bermuda, South Coast
            • Multibeam derived ESRI grids (2m horizontal resolution)
              • CSUMB Seafloor Mapping Lab homepage (download)
                CSUMB Seafloor Mapping Lab homepage
              • Description of Source: Source Contribution: Gridded multibeam bathymetry
              • Temporal extent used: Unknown to
            • NGDC Multibeam Bathymetry Database
              • NGDC Multibeam Bathymetry Database (download)
                Multibeam swath sonar survey data
              • Description of Source: Source Contribution: Multibeam bathymetry data
              • Temporal extent used: 1993-01-01 to 2012-12-31
            • Generalized Bathymetric Chart of the Oceans 30 arc-second grid (2008)
              • GEBCO organizational website (download)
                GEBCO organizational website with links to general information webpages and data access
              • Description of Source: Source Contribution: GEBCO08 Global Bathymetric Model
              • Temporal extent used: Unknown to
            • Topographic spot elevations of Bermuda
              Acquisition Information (collection)
              Instrument
                Platform
                • Digital Elevation Model
                Last Modified: 2017-11-22
                For questions about the information on this page, please email: dem.info@noaa.gov