GEBCO - The General Bathymetric Chart of the Oceans

Since 1903 GEBCO aims to provide the most publicly available bathymetry data sets for the world’s oceans.

Gridded Bathymetry Data

GEBCO’s gridded bathymetric data sets are global terrain models for ocean and land. The grids are available to download or access through Web Map Services.

Data & Products

Part of the GEBCO world map showing bathymetry from the GEBCO grid and names from the GEBCO Gazetteer of Undersea Feature Names

GEBCO produces and makes available a range of bathymetric data sets and products. This includes a global bathymetric grid; gazetteer of undersea feature names, a Web Map Service and printable maps of ocean bathymetry.

Seabed 2030

3D view of the GEBCO grid for the Mariana Trench region in the Northwest Pacific Ocean

Seabed 2030 is a collaborative project between the Nippon Foundation and GEBCO. It aims to bring together all available bathymetric data to produce the definitive map of the world ocean floor by 2030 and make it available to all.

At the International Hydrographic Organization 2023 Assembly, GEBCO leaders meet with HSH Prince Albert II of Monaco (fourth from left) and other national hydrographers

GEBCO Spotlight

GEBCO Celebrates 120 Years of Discovery in Monaco

At the International Hydrographic Organization 2023 Assembly, GEBCO leaders meet with HSH Prince Albert II and other national hydrographers.

Latest Stats and information

How deep are the oceans?

The deepest depth measured so far in the oceans is around 10,920m in the Challenger Deep, part of the Mariana Trench, in the Northwest Pacific Ocean. For comparison, Mount Everest is around 8,850m high.
Over 1,300 seafloor 'mountains' named

The GEBCO Gazetteer of Undersea Feature Names includes names for over 1,300 seamounts, (elevations on the seafloor over 1,000m high).
Training program now in 18th year

Since 2004, the Nippon Foundation/GEBCO Training Program has trained students from around the world in seafloor mapping through a one-year postgraduate course held at the University of New Hampshire, USA.

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Latest News

Map the Gaps Symposium and Crowdsourced Bathymetry Spotlight

Registration is now open for the 2023 Symosium, to held in Monaco 7-8 November 2023. Find out more and how to register.

Arctic-Antarctic and North Pacific Mapping Meeting – save the date

The fifth Seabed 2030 Arctic-Antarctic and North Pacific Mapping Meeting will be held in Bremen, Germany, from 27 to 29 November 2023.

General Bathymetric Chart of the Oceans

GEBCO's aim is to provide the most authoritative publicly-available bathymetry of the world's oceans. It operates under the joint auspices of the International Hydrographic Organization (IHO) and the Intergovernmental Oceanographic Commission (IOC) (of UNESCO).

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