hydrography

This term is a specialized technical noun used primarily in scientific, maritime, and geographic contexts. It describes the systematic measurement and mapping of water bodies, distinguishing it from hydrology, which focuses more on the chemical and physical properties of water and its movement through the environment.

As a field of study or a science, the word is used as an uncountable noun. It refers to the discipline itself or the resulting data and charts produced by that science, rather than individual instances of mapping.