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Gridded Bathymetry Data

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Global ocean & land terrain models

GEBCO’s gridded bathymetric data set, the GEBCO_2019 grid, is a global terrain model for ocean and land at 15 arc-second intervals. More information.

The Grid is available to download:

  • as a global file in netCDF format
  • for user-defined areas in: netCDF, Esri ASCII raster or GeoTiff formats

Download the global grid files

Select data for a user-defined area

Select your grid and the area of interest from the map and tables below. Add your selection to the basket and repeat the process as required. Once you are happy with your selection(s) view the basket and checkout your request to start file preparation. You will be directed to the British Oceanographic Data Centre's (BODC) web site for the data download procedure. You can return to GEBCO's web site once this procedure is complete.

Please note that the map display layers are based on the previous GEBCO grid, GEBCO_2014. It is intended to update these layers in the near future.

Use the '+' button in the top right-hand corner of the map to select to display the GEBCO Source Identifier (SID) Grid. It is best viewed at a zoomed in level to appreciate the detail in the data set.


Define your search box coordinates - input order is most westerly, southerly, easterly, northerly. Alternatively use keyboard Shift+mouse Left Click and Drag a box to define your area of interest on the above map
Coordinates should be decimal degrees (maximum - 5 decimal places) where West and South are entered as negatives and East and North as positives. For example 20 W, 5 S, 10 W, 2 N = -20.0,-5.0,-10.0,2.0

*maximum area allowed is 10800 grid cells by 10800 grid cells, this is equal to an area of 45 degrees by 45 degrees

GEBCO_2019 Grid

Available data options Available formats Select
User-defined area* 2D netCDF
User-defined area* INT16 GeoTIFF (data)
User-defined area* ESRI ASCII

GEBCO_2019 Source Identifier Grid

Available data options Available formats Select
User-defined area* 2D netCDF
User-defined area* INT16 GeoTIFF (data)
User-defined area* ESRI ASCII

Depending on the size of your area selection, or during busy periods, data preparation may take a while. Our file generator service will email you when the data are ready for collection.

Dataset errata

Although every care is taken during the development of the GEBCO bathymetric grids, errors are occasionally reported. Reported issues can be viewed on our errata pages.

Note on vertical datum and GEBCO's grids

GEBCO's global elevation models are generated by the assimilation of heterogeneous data types assuming all of them to be referred to mean sea level. However, in some shallow water areas, the grids include data from sources having a vertical datum other than mean sea level. We are working to understand how best to fully assimilate these data.

Find out more