Civil Engineering - Surveying - Discussion

Canal is not a answer because canal involves in hydraulic structures design type, it is not science.

That why water bodies are considered.

Hydro means water and it includes of its measurement.

Hydrography we are known this topic in open channel flow related water bodies and water activity in map.

Why not the canal system? It is also a water body. Hydro graphic survey means surveying water-bodies. Then canal system also an answer for this question.

Hydrology means the study of water bodies.

Hydro means water and graphics means map. So it deals with large water bodies.

Hydro means water so this answer are large water bodies.

Hydro means with water and graphy is a method of writing or sketching something. So Hydro-graphic surveying is a part of surveying which deals with the water bodies.

Hydrographic survey is the science of measurement and description of features which affect maritime navigation, marine construction, dredging, offshore oil exploration/offshore oil drilling and related activities.

Strong emphasis is placed on soundings, shorelines, tides, currents, seabed and submerged obstructions that relate to the previously mentioned activities. The term hydrography is sometimes used synonymous to describe maritime cartography, which in the final stages of the hydrographic process uses the raw data collected through hydrographic survey into information usable by the end user.

Hydrography is collected under rules which vary depending on the acceptance authority. Traditionally conducted by ships with a sounding line or echo sounding, surveys are increasingly conducted with the aid of aircraft and sophisticated electronic sensor systems in shallow waters.

Hydrographic survey deals the water bodies on the surface of the earth because survey is measuring the line and boundaries.