| Conventions: | CF-1.6 |
| title: | The GEBCO_2014 Grid - a continuous terrain model for oceans and land at 30 arc-second intervals. |
| institution: | On behalf of the General Bathymetric Chart of the Oceans (GEBCO), the data are held at the British Oceanographic Data Centre (BODC). |
| source: | The bathymetric portion of the GEBCO_2014 Grid was largely developed from a database of ship track soundings with interpolation between soundings guided by satellite-derived gravity data. In areas where they improve on this existing base grid, data sets developed by other methods are included. Recognising the importance of local expertise when building a global bathymetric model, GEBCO have been working with regional mapping groups to improve the existing GEBCO grid. Details about the development of the grid and the data sets included can be found in the documentation that accompanies the data set. With the exception of polar regions, land data are based on the 1-km averages of topography derived from version 2.0 of the US Geological Survey SRTM30 gridded digital elevation model data product, created with data from the US National Aeronautics and Space Administration (NASA) Shuttle Radar Topography Mission. For the Arctic region north of 64N the GEBCO grid is based on the International Bathymetric Chart of the Arctic Ocean (IBCAO) v3. This data set uses land data taken largely from the Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010) data set. Over Greenland the approximately 2000 by 2000 m resolution Digital Elevation Model (DEM) published by Ekholm (1996) is used. For the Southern Ocean area, south of 60S, land data are taken from Bedmap2 data set as included in the International Bathymetric Chart of the Southern Ocean (IBCSO). The grid is accompanied by a Source Identifier grid, which identifies which grid cells are based on soundings or existing grids and which have been interpolated. The grid uses the convention that depths are negative. |
| history: | This is version 20150318 of the data set. Information on the history of the data set can be found in the data set documentation available from the internet: http://www.gebco.net/data_and_products/gridded_bathymetry_data/ |
| references: | Information on the data set is available from the GEBCO project web pages: http://www.gebco.net/data_and_products/gridded_bathymetry_data/ |
| comment: | The data in the GEBCO_2014 Grid should not be used for navigation or any purpose relating to safety at sea. |
| node_offset: | 1 |
| elevation: | Grid standard_name: height_above_reference_ellipsoid long_name: Elevation relative to sea level units: m scale_factor: 1.000000000000000 add_offset: 0.000000000000000 sdn_parameter_urn: SDN:P01::BATHHGHT sdn_parameter_name: Sea floor height (above mean sea level) {bathymetric height} sdn_uom_urn: SDN:P06:ULAA sdn_uom_name: Metres
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| lat: | Array of 64 bit Reals [lat = 0..21599] standard_name: latitude long_name: latitude units: degrees_north axis: Y sdn_parameter_urn: SDN:P01::ALATZZ01 sdn_parameter_name: Latitude north sdn_uom_urn: SDN:P06:DEGN sdn_uom_name: Degrees north |
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| lon: | Array of 64 bit Reals [lon = 0..43199] standard_name: longitude long_name: longitude units: degrees_east axis: X sdn_parameter_urn: SDN:P01::ALONZZ01 sdn_parameter_name: Longitude east sdn_uom_urn: SDN:P06::DEGE sdn_uom_name: Degrees east |