International Bathymetric Chart of the Southern Ocean (IBCSO)

IBCSO is the authoritative map of the Southern Ocean with the largest database of depth measurements. With billions of soundings contributed by organisations across the globe, it portrays the Southern Ocean seafloor in so-far unprecedented detail.

IBCSO is a regional mapping initiative of the General Bathymetric Chart of the Oceans (GEBCO). It is closely associated with and supported by the Nippon Foundation – GEBCO Seabed 2030 Project (Seabed 2030).

GEBCO is a project under the auspice of the International Hydrographic Organization (IHO) and the Intergovernmental Oceanographic Commission (IOC) of UNESCO. Furthermore, IBCSO is an Expert Group of the Scientific Committee on Antarctic Research (SCAR).

1,480 datasets

including 950 multibeam datasets and 498 singlebeam datasets

88 organisations collected data

we’ve got the whole ABC of hydrography except for institutes starting with Q, X, Y or Z

Pooling data from 22 countries

That’s app. 16% of all countries bordering at least one ocean!

The IBCSO projection has it's own EPSG code now!

Our polar stereographic projection used in IBCSO is now registered under EPSG 9354!

25.5 billion soundings

entered the processing pipeline for IBCSO v2, that’s roughly 6 times as many soundings as was available for IBCSO v1 with 4.2 billion soundings!

23.6 % of the Southern Ocean is mapped by true data!

22.4% of all ocean cells were covered by multibeam data, 1.2% by singlebeam and less than 0.06% by other sources (at a resolution of 500x500m)!


IHO Assembly 2023

The Assembly as the main organ of the Organization is formed by the representatives of the Member States. It meets every three years to provide general guidance on the functioning and work of the Organization, as well as taking decisions of technical and administrative nature.

The 3rd IHO Assembly will take place from May 2 – 5, 2023 at the Grimaldi Forum in Monaco, France. Registration and event list you can find Event List.

IBCSO poster

Right in time for Christmas, we have received the printed maps of IBCSO v2! We will send them to all co-authors. Do You want to get a poster? Contribute Your data to the next IBCSO version! 😉

IBCSO at Mastodon

To make global community aware how important bathymetry is, IBCSO is expanding its outreach activities to Mastodon. Transferring knowledge and connecting people via one more channel!

Southern Ocean Observing System (SOOS) Symposium

Southern Ocean Observing System (SOOS) Symposium

The first Southern Ocean Observing System (SOOS) Symposium will be held from 14-18 August 2023 in Hobart, Tasmania. It is our pleasure to invite you to this milestone event for the SOOS community.You can find more information here:...

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ICES Annual Science Conference 2022

ICES Annual Science Conference 2022

11–14 September 2023 in Bilbao, Spain ​​​​​​​​​​We are excited to announce that next year's ASC will be hosted by Spain at Palacio Euskalduna​ in Bilbao, Basque Country, Spain!​The International Council for the Exploration of the Sea (ICES) is...

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EGU23 General Assembly

EGU23 General Assembly

Taking place on 23-28 April, the EGU General Assembly 2023 will bring together geoscientists from all over the world for an hybrid meeting covering all disciplines in the Earth, planetary, and space sciences. EGU aims to provide a welcoming,...

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What is bathymetry and the aim of exploring the seafloor? An interview with Boris Dorschel and WDR (in German).

RV Polarstern live tracker