Research On Benthal Terrain Modeling Technology And Precision Evaluation Base On Multi-beam Data

This article mainly research the technology of modeling benthal terrain and precision evaluate based on the data collected by the multi beam equipment. Modeling aspect, constructing the digital elevation model through TIN and GRID function, discussing the characteristic of point by point technique and so on,bringing forward the method of constructing the benthal DEM by using the divide and counquer and B spline . precision evaluation aspect,the article used four common arithmetic to construct DEM,that is anti—distance ,Kring interpose,natual labor point,linearity triangle divide.Through the methods, I construct the DEMs in different scale and compare them. Disscussing the theory precision model bringed by LiZhilin. Compared four arithmetic in aspects of modeling duration and DEM error,drawed the duration—DEM scale,error DEM scale curve; Bring forward the math model for building bathy DEM by the arithmetics.Through the model ,give the suggestion for optimize the ocean survey plan,it has the direction meaning for the sea measurement.