海量多波束数据抽稀方法的比对分析

Comparison and Analysis of Thinning Methods for Mass Data Acquired by Multibeam Sounders

针对构建海底DEM高效率、高精确度的要求,对比分析了海量多波束水深数据的抽稀方法。利用格网分块结构高效组织海量多波束水深数据,分别采用三种数学模型内插网格节点水深值,实现了不同网格尺度下的数据抽稀。实验证明:所提分块索引策略能提高多波束数据抽稀效率;距离加权内插模型能有效提高海底DEM模型的准确度。

Aiming at the demands of high efficiency and accuracy for seafloor DEM（digital elevation model）,the paper compared and analyzed thinning methods of mass data acquired by multibeam sounders.The proposed method organized bathymetric data utilizing grid block structure,interpolated depth at grid node adopting three mathematical models and thinned data with multi-scale grid.Experimental results demonstrated that the suggested strategies using block index can improve efficiency for thinning the multibeam bathymetric data and the interpolated model using distance weighting can improve the accuracy of seafloor DEM effectively.