To many, the traditional role of surveyor has been to determine the position of feature in both the natural and environment on or below the surface of the earth and to represent these on a map. Hydrographic survey is a method to survey to find the reduce depth of the sea, the tidal information of the sea to find the maximum level of tide and the minimum level of tide of the survey area, to get the whole idea of existing details and structure which already exist and others.
: Hydrographic is the science which deals with the instrument and description of the physical feature of bodies of water and their littoral land areas.
: Special emphasis usually placed on the element that affect safe navigation and the publication of such information in a suitable form for use in navigation.
A hydrographic surveying are involves the systematic ‘mapping’ of an area of sea and surrounding coastal detail.
:The information collecting during the survey will enable a cartographer to portray a part of the Earth surface on a flat piece of paper and to indicate by sounding, height and depth contour, and spot height, the various irregularities both above and below the sea surface.
: For hydrographic survey all the details use to the mariner must be correctly described and positioned relative to each other end
: Hydrographic survey is the process of measuring the depth and mapping the bottom of lakes, rivers, and ocean.
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