Monday, 15 December 2014

GEBCO_2014 Grid released

The General Bathymetric Chart of the Oceans (GEBCO) is pleased to announce the release of its latest global terrain model at 30 arc-second intervals — the GEBCO_2014 Grid. The British Oceanographic Data Centre (BODC) maintain and distribute bathymetric grids on behalf of the GEBCO community.
The grid marks a significant update to the previous release (the GEBCO_08 Grid) and benefits from contributions from numerous data providers and mapping programmes. The updated regional compilations included in GEBCO_2014 encompass 19% of the world ocean area. These additions, mostly based on multibeam data collected using modern equipment and navigation techniques, provide substantially higher-resolution details on a 30 arc-second spacing than previously released versions of the GEBCO grid.
GEBCO 2014 Grid for the Atlantic Ocean area ©
There is more detailed information in the documentation accompanying the data set.
Regional compilations included in the new grid:
  • International Bathymetric Chart of the Southern Ocean (IBCSO) v1
  • International Bathymetric Chart of the Arctic Ocean (IBCAO) v3
  • European Marine Observation and Data Network (EMODnet) Bathymetry 2013 data set
  • Baltic Sea Bathymetry Database
  • Australian Bathymetry and Topography Grid, June 2009
  • Global Multi-Resolution Topography (GMRT) Synthesis from the Lamont-Doherty Earth Observatory of Columbia University
  • Japan Coast Guard Grid for the North Western Pacific Ocean region
  • Updates of the South China Sea Region and waters off Chile using data supplied from Electronic Navigation Charts (ENCs)
  • Bathymetry of the North American Great Lakes
  • North Atlantic Ocean, Gulf of Cadiz region
  • South Pacific Ocean, Coral Sea region
As with the previous release, the GEBCO_2014 grid is accompanied by a Source Identifier (SID) Grid. This indicates whether cells in the GEBCO_2014 Grid are based on soundings or existing grids or are based on interpolation.
The grid is available to download in netCDF form; it is planned to make the data available in Esri ASCII raster and data GeoTIFF formats in the near future. The grid is also available in the form of a shaded relief image via a web map service.

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