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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.
  • ID not available.
gov.noaa.ngdc.mgg.dem:11519
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Download Data
Distribution Formats
  • netCDF(Version:4 Classic)
Distributor DEM Information
NOAA National Centers for Environmental Information
dem.info@noaa.gov
Dataset Point of Contact DEM Information
NOAA National Centers for Environmental Information
dem.info@noaa.gov
Coverage Description ISO valid extents for Niue 3 sec. DEM
Time Period
Spatial Reference System urn:ogc:def:crs:EPSG::4326urn:ogc:def:datum:EPSG::5831
Spatial Bounding Box Coordinates
West:-172.85
East:-169.20
South:-20.00
North:-17.50
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 Centers for Environmental Information. Not subject to copyright protection within the United States.
Originators
  • NOAA National Centers for Environmental Information
Collaborators
  • NOAA Center for Tsunami Research
    NOAA PMEL Center for Tsunami Research (NCTR)
Publishers
  • NOAA National Centers for Environmental Information
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
Uncontrolled
  • Coastal Relief
  • Gridded elevations
  • Integrated bathymetry and topography
Global Change Master Directory (GCMD) Service 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) Service 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
Place keywords NASA/GCMD Location Keywords
  • Ocean > Pacific Ocean > South Pacific Ocean
  • Vertical Location > Land Surface
  • Vertical Location > Sea Floor
Uncontrolled
  • Niue
  • Pacific Ocean
Project keywords Global Change Master Directory (GCMD) Project Keywords
  • ICSU-WDS > International Council for Science - World Data System
  • NOAA OneStop Project
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
  • 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 10.3.1.4959
Source Datasets
  • Contours digitized from multibeam survey of Niue fore-reef
    • Description of Source: Alofi harbor multibeam data
    • Temporal extent used: 2005-05-08 to 2005-05-13
  • Contours digitized from multibeam survey of Niue fore-reef
    • Description of Source: Bathymetry map-derived contours
    • Temporal extent used: 2005-05-08 to 2005-05-13
  • 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
    • Time Instant: 2015-03-18
  • 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
    • Description of Source: gridded topography data
    • Time Instant: 2013-01-01
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.
Acquisition Information (collection)
Instrument
    Platform
    • Digital Elevation Model
    Last Modified: 2017-11-28
    For questions about the information on this page, please email:dem.info@noaa.gov