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Gridded Bathymetry Data

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Global ocean & land terrain models

GEBCO’s gridded bathymetric data set, the GEBCO_2020 grid, is a global terrain model for ocean and land at 15 arc-second intervals. It is accompanied by a Type Identifier (TID) Grid that gives information on the types of source data that the GEBCO_2020 Grid is based.

More information about the grid, its terms of use and attribution.

Download global coverage grids

The GEBCO_2020 Grid and TID Grid can be download as global files in netCDF format or a set of 8 tiles (each with an area of 90° x 90°), giving global coverage, in Esri ASCII raster and data GeoTiff formats. The data filea are included in a zip file along with the data set documentation.

GEBCO_2020 Grid netCDF
(4 Gbytes, 7.5 Gbytes uncompressed)
Data GeoTiff
(4 Gbytes, 8 Gbytes uncompressed)
Esri ASCII raster
(5 Gbytes, 20 Gbytes uncompressed)
GEBCO_2020 TID Grid netCDF
90 Mbytes, 4 Gbytes uncompressed)
Data GeoTiff
(96 Mbytes, 7 Gbytes uncompressed)
Esri ASCII raster
(108 Mbytes, 9.5 Gbytes uncompressed)

Please note that the size of the uncompressed files.

Download data for user-defined areas

Use our application to select and download data in netCDF, Esri ASCII raster and data GeoTiff formats.

Access the GEBCO grid download application

Data set attribution

If the data sets are used in a presentation or publication then we ask that you acknowledge the source.This should be of the form:

GEBCO Compilation Group (2020) GEBCO 2020 Grid (doi:10.5285/a29c5465-b138-234d-e053-6c86abc040b9)

Terms of use

The GEBCO Grid is placed in the public domain and may be used free of charge. Use of the GEBCO Grid indicates that the user accepts the conditions of use and disclaimer information.

Data set errata and known issues

Although every care is taken during the development of the GEBCO bathymetric grids, errors can occasionally occur, and can be reported to the Seabed 2030 Global Centre (). Known issues can be viewed on our errata pages.

Type Identifier (TID) Grid

The TID grid identifies the type of source data that the corresponding grid cells in the GEBCO Grid are based on. Further information about the TID codes can be found in the accompanying documentation.

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