1. Hydrographic Survey
Ildefonso, Sorbi

2. Hydrography

Branch of science that deals with the measurement of bodies of water

3. Deals with the physical features of the navigable portion of the earths surface and adjoining coastal areas. 4. Sounding measurement of depth below the water surface 5. Applications of sounding: 6. Making nautical charts for safety of navigation 7. Development and engineering projects such as piers, dams and bridges 8. Scientific and academic studies