CSB Census / Full archive · Recent activity

Full archive

Every crowdsourced depth sounding the IHO DCDB has published through NOAA, counted and deduplicated. Updated after each NCEI publication batch.

Map

By collection month

Independent census by Long Horizon Observatory, derived from NOAA NCEI / IHO DCDB public data. Duplicates are measured in NCEI's published archive by provider label; causes are not attributed. A vessel-day is one platform ID collecting in a cell on one day. Not for navigation. Methodology · Code