hydrography
hyd·rog·raphy
noun
1.
the science of the measurement and description and mapping of the surface waters of the earth with special reference to navigation
Origin
From hydro- + -graphy.
Related words
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.