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Contours digitized from multibeam survey of Niue fore-reef |
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1 |
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Digital Elevation Model Global Mosaic ArcGIS Image Service |
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1 |
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Digital Elevation Model of Niue: Procedures, Data Sources and Analysis |
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1 |
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Generalized Bathymetric Chart of the Oceans 30 arc-second grid (2008) |
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1 |
GCMD Data Center Keywords |
Global Change Master Directory (GCMD) Data Center Keywords |
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1 |
GCMD Project Keywords |
Global Change Master Directory (GCMD) Project Keywords |
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2 |
NASA/Global Change Master Directory (GCMD) Earth Science Services Keywords |
Global Change Master Directory (GCMD) Service Keywords |
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1 |
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Instantaneous Water Level depth |
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1 |
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NASA/GCMD Data Resolution Keywords |
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1 |
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NASA/GCMD Earth Science Keywords |
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1 |
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NASA/GCMD Location Keywords |
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1 |
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NASA/GCMD Platform Keywords |
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NCEI Digital Elevation Model Extents ArcGIS Feature Layer |
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1 |
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NCEI Multibeam Bathymetry Database |
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1 |
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NCEI Trackline Bathymetry Database |
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1 |
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Niue 3 arc-second Coastal Digital Elevation Model |
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1 |
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Shuttle Radar Topography Mission (SRTM) data |
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2 |
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Uncontrolled |
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1 |
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World Geodetic System 1984 |
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1 |
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http://www.epsg-registry.org/ |
European Petroleum Survey Group Geodetic Parameter Registry |
Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured
dataset of Coordinate Reference Systems and Coordinate Transformations. |
search |
1 |
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http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:datum:EPSG::5831 |
Instantaneous Water Level depth |
Link to Geographic Markup Language (GML) description of reference system. |
information |
1 |
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http://www.gebco.net |
GEBCO organizational website |
GEBCO organizational website with links to general information webpages and data access |
download |
1 |
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http://www.ngdc.noaa.gov/mgg/bathymetry/multibeam.html |
NCEI Multibeam Bathymetry Database |
Multibeam swath sonar survey data |
download |
1 |
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http://www.ngdc.noaa.gov/mgg/geodas/trackline.html |
NCEI Trackline Bathymetry Database |
Single-beam sonar survey data |
download |
1 |
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https://epsg.org/crs_4326/WGS-84.html |
WGS 84 |
GML of World Geodetic System 1984 coordinate reference system. |
information |
1 |
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https://epsg.org/home.html |
European Petroleum Survey Group Geodetic Parameter Registry |
Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured
dataset of Coordinate Reference Systems and Coordinate Transformations. |
search |
1 |
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https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_mosaics/DEM_global_mosaic/ImageServer |
DEM Global Mosaic (Elevation Values) ArcGIS Image Service |
REST endpoint for DEM Global Mosaic (Elevation Values) ArcGIS Image Service |
search |
1 |
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https://gis.ngdc.noaa.gov/arcgis/rest/services/DEM_mosaics/DEM_global_mosaic_hillshade/ImageServer |
DEM Global Mosaic (Color Shaded Relief) ArcGIS Image Service |
This service provides a color shaded relief visualization of the data. The elevations/depths
are displayed using this color ramp: https://gis.ngdc.noaa.gov/viewers/images/dem_color_scale.png. |
search |
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https://gis.ngdc.noaa.gov/arcgis/services/DEM_mosaics/DEM_global_mosaic_hillshade/ImageServer/WMSServer?request=GetCapabilities&service=WMS |
DEM Global Mosaic (Color Shaded Relief) WMS |
Capabilities document for Open Geospatial Consortium Web Map Service for DEM Global
Mosaic (Color Shaded Relief) |
search |
1 |
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https://noaa.maps.arcgis.com/home/item.html?id=0afa88a1701749dbbf76fcadca4f77f3 |
NOAA GeoPlatform Entry for NCEI Digital Elevation Model (DEM) Extents |
NOAA GeoPlatform listing for NCEI Digital Elevation Model (DEM) Extents |
information |
2 |
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https://noaa.maps.arcgis.com/home/item.html?id=c876e3c96a8642ab8557646a3b4fa0ff |
NOAA GeoPlatform Entry for DEM Global Mosaic (Elevation Values) |
NOAA GeoPlatform listing for DEM Global Mosaic (Elevation Values) |
information |
2 |
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https://noaa.maps.arcgis.com/home/item.html?id=e11ebaeb19544bb18c2afe440f063062 |
NOAA GeoPlatform Entry for DEM Global Mosaic (Color Shaded Relief) |
Shaded relief visualization of a global seamless bathymetry/topography mosaic of digital
elevation models at NOAA/NCEI. |
information |
2 |
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https://noaa.maps.arcgis.com/home/item.html?id=e9ba2e7afb7d46cd878b34aa3bfce042 |
Digital Elevation Models Mosaic (Individual DEMs) |
An image service providing access to bathymetric/topographic digital elevation models
stewarded at NOAA's National Centers for Environmental Information. Either individual
DEMs or small subsets can be accessed through this service. |
search |
1 |
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https://services2.arcgis.com/C8EMgrsFcRFL6LrL/arcgis/rest/services/ncei_dem_extents/FeatureServer |
NCEI Digital Elevation Model (DEM) Extents ArcGIS Feature Service |
REST endpoint for NCEI Digital Elevation Model (DEM) Extents ArcGIS Feature Service |
search |
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https://www.earthdata.nasa.gov/learn/find-data/idn/gcmd-keywords |
Global Change Master Directory (GCMD) Keywords |
The information provided on this page seeks to define how the GCMD Keywords are structured,
used and accessed. It also provides information on how users can participate in the
further development of the keywords. |
information |
2 |
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https://www.ncei.noaa.gov/products/coastal-elevation-models |
Coastal Elevation Models at NCEI |
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information |
1 |
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https://www.ngdc.noaa.gov/mgg/dat/dems/regional_tr/niue_3_isl_2016.pdf |
Digital Elevation Model of Niue: Procedures, Data Sources and Analysis |
Report describing the development of the Niue DEM |
download |
1 |
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https://www.ngdc.noaa.gov/thredds/dodsC/regional/niue_3_isl_2016.nc.html |
OPeNDAP Dataset Access Form |
OPeNDAP Dataset Access Form |
download |
1 |
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https://www.ngdc.noaa.gov/thredds/fileServer/regional/niue_3_isl_2016.nc |
Download NetCDF File |
Download NetCDF File |
download |
1 |
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https://www.ngdc.noaa.gov/thredds/ncml/regional/niue_3_isl_2016.nc?catalog=https%3A%2F%2Fwww.ngdc.noaa.gov%2Fthredds%2Fcatalog%2Fregional%2Fcatalog.html&dataset=regionalDatasetScan%2Fniue_3_isl_2016.nc |
NetCDF Markup Language file |
NetCDF Markup Language file |
information |
1 |
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https://www.ngdc.noaa.gov/thredds/ncss/regional/niue_3_isl_2016.nc/dataset.html |
Download a subset of the NetCDF |
Download a subset of the NetCDF |
download |
1 |
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https://www.ngdc.noaa.gov/thredds/wcs/regional/niue_3_isl_2016.nc?service=WCS&version=1.0.0&request=GetCapabilities |
Web Coverage Service GetCapabilities |
Web Coverage Service GetCapabilities |
information |
1 |
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https://www.ngdc.noaa.gov/thredds/wms/regional/niue_3_isl_2016.nc?service=WMS&version=1.3.0&request=GetCapabilities |
Web Map Service GetCapabilities |
Web Map Service GetCapabilities |
information |
1 |
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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.
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1 |
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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.
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1 |
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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.
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1 |
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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.
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1 |
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2016-04-01T00:00:00 |
Topographic raster data were converted to an ASCII XYZ file using GDAL's raster utility.
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1 |
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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.
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1 |
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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.
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