Technical Design for Depth Survey Mapping Using Multibeam Equipment

14:07, 11/07/2024

On December 15, 2017, the Ministry of Transport issued Circular 49/2017/TT-BGTVT detailing the technical design during the survey for mapping depth profiles using multibeam echosounders.

Accordingly, Circular 49 prescribes the technical design for depth contour surveys using multibeam equipment to be carried out as follows:

- Based on the accuracy requirements of the depth measurement work to design and estimate the total sources of error of the entire system, including random errors of each component device and other factors such as tides, measurement equipment... The remaining systematic errors must be estimated and included in the total error calculation;- Create a mathematical basis for measurement: Reference ellipsoid, projection, central meridian, scale factor of the projection zone, parameters for converting between the two coordinate systems WGS-84 and local coordinate system VN-2000;- Design and establish the survey boundary zones - matrix (if any), design of measurement lines: Based on specific requirements of each project such as the scale of contour maps required to be established, the topographical conditions of the survey area according to existing map, hydrographic chart documents, and the technical features of the equipment system to be used. Hence, design the boundary zones of the survey area and the measurement lines within each zone.

See details in Circular 49/2017/TT-BGTVT effective from February 15, 2018.

-Thao Uyen-

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