The world ocean,
sounded by
the crowd

Every depth sounding volunteers and partners have shared through the IHO's Crowdsourced Bathymetry initiative and its Data Centre for Digital Bathymetry, counted, deduplicated and mapped, and kept current as NOAA NCEI publishes each batch to the open archive. Browse the raw soundings in the DCDB data viewer.

Independent census by Long Horizon Observatory from NOAA NCEI / IHO DCDB public data. Cells: H3. Land: Natural Earth. Not for navigation. Methodology · Code