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A bathometer (also bathymeter) is an instrument for measuring water depth. [ 1 ] [ 2 ] It was previously used mainly in oceanographical studies, but is rarely employed nowadays. The term originates from Greek βαθύς ( bathys ), "deep" and μέτρον ( métron ), "measure".
World map with ocean topography. Seabed topography (ocean topography or marine topography) refers to the shape of the land when it interfaces with the ocean.These shapes are obvious along coastlines, but they occur also in significant ways underwater.
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The GEBCO chart series was initiated in 1903 by an international group of geographers and oceanographers, under the leadership of Prince Albert I of Monaco.At that time there was an explosion of interest in the study of the natural world and this group recognized the importance of a set of maps describing the shape of the ocean floor.
Bathymetric map of Kamaʻehuakanaloa Seamount (formerly Loihi) with isobaths. A bathymetric chart is a type of isarithmic map that depicts the submerged bathymetry and physiographic features of ocean and sea bottoms. [1]
Satellite-derived bathymetry model for the Midway Islands USA. The bathymetric data have been created and visualised with SDB-Online webapp. Satellite-derived bathymetry (SDB) is the calculation of shallow water depth from active or passive satellite imaging sensors.
Bathymetric data from all data holders are reviewed and pooled at 1 meter resolution to form the basis of the bathymetric data set. This includes all seafloor mapping sources from modern echo sounding methods such as multibeam echosounders and singlebeam echosounders to historic lead line measurements.
Illustration of echo sounding using a multibeam echosounder. The MTVZA sounder received from the Meteor M2-2 satellite by an amateur station. Echo sounding or depth sounding is the use of sonar for ranging, normally to determine the depth of water ().