loodusgeograafia haru, mis tegeleb veekogude mõõtmise, kirjeldamise ja kaardistamisega
science dealing with the description and measurement of open water bodies, such as oceans, seas, streams, rivers, lakes and reservoirs
branch of applied sciences which deals with the measurement and description of the physical features of oceans, seas, coastal areas, lakes and rivers, as well as with the prediction of their change over time, for the primary purpose of safety of navigation and in support of all other marine activities, including economic development, security and defense, scientific research, and environmental protection
Suuremahulist hüdrograafiat teostavad tavaliselt riiklikud või rahvusvahelised organisatsioonid, kes sponsoreerivad andmete kogumist täpsete uuringute abil ning avaldavad navigeerimise eesmärgil graafikuid ja vastavat kirjeldavat materjali.
Large-scale hydrography is usually undertaken by national or international organizations which sponsor data collection through precise surveys and publish charts and descriptive material for navigational purposes.
