Definitions for "Bathymetry"
The art or science of sounding, or measuring depths in the sea.
The science of measuring ocean depths to determine the topography of the sea floor.
The science of measuring the depth of bodies of water in order to determine underwater topography. A bathymetric map shows the topographic contours of the bottom of a body of water. A bathymetric chart, in addition, provides navigational information. (See Hydrographic chart).
Keywords:  marine, sub, features, surface
Sub-marine surface features.