Research on Multi Beam Sideline Model Based on Geometric Relationships

Marine surveying and mapping is a fundamental construction work to optimise the development of marine resources and safeguard marine rights and interests, while multibeam bathymetric system is an important tool for marine surveying and mapping engineering. This paper studies a multibeam bathymetry model based on geometric relationship. In this paper, firstly analyse the geometric relationship of measurement parameters, and get the mathematical models of coverage width and seawater depth, and the overlap rate of adjacent strips. Considering the changing relationship between the heading of the ship and the normal projection of the slope, this paper further deduces the coverage width equation in three-dimensional space on the basis of the two-dimensional multibeam slope model. It not only provides a simplified strategy for ocean mapping, but also provides a basis for solving the data coverage problem when the heading of the sounding process is not parallel to the isobath.