Hydrography

Massive hydrographical studies are usually undertaken by national or international organizations that sponsor data collection through surveys and publication of charts and descriptive materials for navigational purposes. 

Hydrography's origin lies in the making of chart like drawings and notations made by individual mariners. It was usually a private property, even closely held secrets, used for commercial or military advantage.

Related pages
 Bathymetry
 Cartography
 Drought
 Flood
 Hydrology

 Notes 

Category:Branches of geography