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Hydrographic survey is the science of measurement and description of features which affect maritime navigation, marine construction, dredging, offshore wind farms, offshore oil exploration and drilling and related activities. Surveys may also be conducted to determine the route of subsea cables such as telecommunications cables, cables ...
Table of geography, hydrography, and navigation, from a 1728 Cyclopaedia.. Hydrography is the 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 ...
Hydrographic Department, UK agency for providing hydrographic and marine geospatial data; Hydrographic surveys, science of measurement and description of features which affect maritime navigation, construction, dredging, oil exploration, and drilling; Atlas Hydrographic, a hydrographic and oceanographic systems company
Nautical charts are based on hydrographic surveys and bathymetric surveys. As surveying is laborious and time-consuming, hydrographic data for many areas of sea may be dated and are sometimes unreliable. Depths are measured in a variety of ways. Historically the sounding line was used.
Site surveys are inspections of an area where work is proposed, to gather information for a design. It can determine a precise location, access, best orientation for the site and the location of obstacles. The type of site survey and the best practices required depend on the nature of the project. [6]
The U.S. Coast Survey was a civilian agency but, from the beginning, members of the U.S. Navy and U.S. Army were detailed to service with the Survey, and ships of the U.S. Navy and United States Revenue-Marine (renamed the United States Revenue Cutter Service in 1894) were also detailed to its use.
Аԥсшәа; العربية; Aragonés; Arpetan; Asturianu; Azərbaycanca; বাংলা; Башҡортса; Беларуская; Беларуская ...
A main product of the VORF project was the gridded vertical correction files which deliver the capability to transfer heights and depths from one vertical reference system to another, "allowing the direct use of depth data from surveys which is referred to a WGS84 compatible datum rather than Chart Datum and thus enabling Hydrographic surveyors to survey without the need to measure tides".