Article
Article
Hydrography
Article By:
International Hydrographic Organization.
Last reviewed:November 2019
DOI:https://doi.org/10.1036/1097-8542.329400
The science of measuring and describing the physical features and conditions of navigable waters and adjoining coastal areas. Hydrography is an applied science relating to the study of marine areas, including oceans, rivers, and lakes. It involves geodesy, physical oceanography, marine geology, geophysics, photogrammetry (in coastal areas), remote sensing, and nautical cartography. Basic parameters observed during a hydrographic survey are time, position, depth of water, and bottom type. The observation and analysis of tides and currents are also normally included in order to reduce depth measurements to a common vertical datum and to prepare tidal predictions and current maps or diagrams for navigational use. See also: Geodesy; Photogrammetry
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