CSB Census

An open census of crowdsourced bathymetry: every depth sounding the IHO Data Centre for Digital Bathymetry has published through NOAA, counted, deduplicated and mapped, and kept current after each publication batch.

Full archive

Everything published since the archive began, by place: soundings, vessel-days and duplicates.

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Recent activity

What came in today, this week and this month, where boats have been, and how long data takes to appear.

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