Before revision: Seabed topography Measurement 250px|First printed map of oceanic bathymetry, produced with data from USS Dolphin (1853) Originally, bathymetry involved the measurement of ocean depth through depth sounding.
After revision: excerpt|</ref>Seabed|Topography<ref>Seabed topography Measurement 250px|First printed map of oceanic bathymetry, produced with data from USS Dolphin (1853) Originally, bathymetry involved the measurement of ocean depth through depth sounding.