the science of the measurement, description, and mapping of the surface waters of the earth, with special reference to their use for navigation.
those parts of a map, collectively, that represent surface waters.

1550–60; hydro-1 + -graphy

hydrographer, noun
hydrographic [hahy-druh-graf-ik] , hydrographical, adjective
hydrographically, adverb
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World English Dictionary
hydrography (haɪˈdrɒɡrəfɪ)
1.  Compare hydrology the study, surveying, and mapping of the oceans, seas, and rivers
2.  the oceans, seas, and rivers as represented on a chart

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
hydrography   (hī-drŏg'rə-fē)  Pronunciation Key 
  1. The scientific description and analysis of the physical characteristics of Earth's surface waters, including temperature, salinity, oxygen saturation, and the chemical content of water. Oceanography (the study of saltwater bodies) and limnology (the study of freshwater bodies) are subsets of hydrography.

  2. The mapping of bodies of water.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica


the art and science of compiling and producing charts, or maps, of water-covered areas of the Earth's surface. A brief treatment of hydrography follows. For full treatment, see map and surveying: Hydrography.

Learn more about hydrography with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
The science of hydrography has changed much over the last century and even the last few decades.
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