hydrography

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Ensuring maritime safety through hydrographic surveys

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World map. Continents. Oceans. Mendel thumb ok

Just How Many Oceans Are There?

Galaxy clusters like Abell 2744 can act as a natural cosmic lens, magnifying light from more distant, background objects through gravity. NASA's James Webb Space Telescope may be able to detect light from the first stars in the universe if they are gravitationally lensed by such clusters. (astronomy, space exploration, galaxies)

How Fast Is the Universe Expanding?

ripped torn flag, pirate, skull

Are There Laws on the High Seas?

A big, powerful wave breaking near the shore.

What Makes a Wave Go Rogue?

Sailboat against a beautiful landscape

Which Waters Do You Pass Through When You “Sail the Seven Seas”?

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Ethel Rosenberg arrested in August 1950. Photograph dated Aug. 8, 1950. American civilians executed for espionage. Spies, communists, Julius Rosenberg

Spies Like Us: 10 Famous Names in the Espionage Game

American bison (Bison bison) also known as buffalo or plains buffalo on the prairie, western U.S.

What’s the Difference Between Bison and Buffalo?

Close up of praying mantis walking on stone ground against a blurred background in Japan

6 Animals That Eat Their Mates

Thumbnail for flags that look alike quiz Russia, Slovenia, Iceland, Norway

Flags That Look Alike

Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Portrait of Marie Antoinette by Jean-Francois Janinet, 1777. Color etching and engraving with gold leaf printed on two sheets, 30x13.5 in.

Did Marie-Antoinette Really Say “Let Them Eat Cake”?

Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.

What Is the Emoluments Clause?

hydrography: Facts & Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Facts

Also Known As	hydrographic charting

Videos

Ensuring maritime safety through hydrographic surveys

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Topics

Seabeam GLORIA General Bathymetric Chart of the World bathymetric map ocean Salinity-Temperature-Depth system Conductivity-Temperature-Depth system oceanography cartography map Ordnance Survey International GIS atlas photogrammetry projection triangulation

Dig Deeper: More Articles That Discuss This Topic

surveying: Hydrography

Key People

Matthew Fontaine Maury

Matthew Fontaine Maury

American hydrographer

Alexander Dalrymple

British geographer and hydrographer

Pierre Mechain

French scientist