Niue 3 arc-second Coastal Digital Elevation Model

NOAA's National Centers for Environmental Information 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 warning 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.
Cite this dataset when used as a source.
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Distribution Formats
  • netCDF (Version: 4 Classic)
Distributor Distributor information not available
Dataset No POCs available for this dataset
Coverage Description ISO valid extents for Niue 3 sec. DEM
Time Period
Spatial Reference System urn:ogc:def:datum:EPSG::5831
Spatial Bounding Box Coordinates
N: -17.50
S: -20.00
E: -169.20
W: -172.85
Spatial Coverage Map
General Documentation
Associated Resources
Publication Dates
  • publication: 2016-08-04
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
  • Not to be used for navigation. Although these data are of high quality and useful for planning and modeling purposes, they are not suitable for navigation. For navigation, please refer to the NOS nautical chart series.
  • Produced by the NOAA National Geophysical Data Center. Not subject to copyright protection within the United States.
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • NOAA Center for Tsunami Research
    NOAA/PMEL/Center for Tsunami Research (NCTR)
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Theme keywords NASA/GCMD Earth 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 > Topographical Relief Maps
  • Earth Science > Land Surface > Topography > Topographical Relief Maps
  • Earth Science > Oceans > Coastal Processes > Coastal Elevation
NASA/GCMD Platform Keywords
  • DEM > Digital Elevation Model
NASA/GCMD Data Resolution Keywords
  • H: 1 meter - < 30 meters
  • V: 1 meter - < 10 meters
  • Coastal Relief
  • Gridded elevations
  • Integrated bathymetry and topography
Global Change Master Directory (GCMD) Service Keywords
Place keywords NASA/GCMD Location Keywords
  • Ocean > Pacific Ocean > South Pacific Ocean
  • Vertical Location > Land Surface
  • Vertical Location > Sea Floor
  • Niue
  • Pacific Ocean
      Use Constraints No constraint information available
      Fees Fee information not available.
      Lineage information for: dataset
      Processing Steps
      • 2016-04-01T00:00:00 - Datasets were visually inspected with ArcGIS, GlobalMapper and MB-System for identification and editing of data anomalies, including but not limited to inconsistencies between overlapping or adjacent datasets, 'noisy' data, etc.
      • 2016-04-01T00:00:00 - All data were converted to ASCII XYZ files. A 3 arc-second bathymetric 'pre-surface' grid of bathymetric data (near- and far-shore multibeam and trackline soundings) 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 Niue to remove values over land. The clipped 'pre-surface' was then converted to ASCII XYZ point data.
      • 2016-04-01T00:00:00 - Seafloor contours (300, 600 and 900 meters) of Niue's fore-reef slope were digitized manually and converted to an ASCII XYZ file using ArcGIS.
      • 2016-04-01T00:00:00 - Topographic raster data were converted to an ASCII XYZ file using GDAL's raster utility.
      • 2016-04-01T00:00:00 - The final integrated 3 arc-second topo-bathy DEM was created using MB-System's 'mbgrid' tool, which utilizes a high-tension spline interpolation method to fill grid cells with no input elevation values. The bathymetric surface points, digitized contours, GEBCO08 grid and topographic data were used as source datasets in the spline gridding algorithm. Preferential weighting was given to more recent, higher-accuracy datasets.
      • 2016-04-01T00:00:00 - The DEM was qualitatively evaluated to identify any artifacts that may have been introduced during the gridding process. As 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.
      Processing Environment Native Dataset Environment: Microsoft Windows 7 Enterprise; ESRI ArcGIS
      Source Datasets
      • Contours digitized from multibeam survey of Niue fore-reef
        • Contours digitized from multibeam survey of Niue fore-reef
          • 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: GEBCO08 Global Bathymetric Model
            • Temporal extent used: Unknown to
          • NCEI Multibeam Bathymetry Database
            • NCEI Multibeam Bathymetry Database (download)
              Multibeam swath sonar survey data
            • Description of Source: Multibeam bathymetry data
            • Temporal extent used: 1984-01-01 to 2008-12-31
          • NCEI Trackline Bathymetry Database
            • NCEI Trackline Bathymetry Database (download)
              Single-beam sonar survey data
            • Description of Source: Trackline bathymetry data
            • Temporal extent used: 1962-01-01 to 2003-12-31
          • Shuttle Radar Topography Mission (SRTM) data
            Acquisition Information (collection)
              • Digital Elevation Model
              Last Modified: 2017-11-28
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