基于海量多波束数据的海底地形模型的构建与可视化

针对多波束数据组织、处理的技术难点,提出一种高效的适合海量、离散水深数据的预处理技术。首先,建立空间索引数据块,同时采用Delauny三角网技术和网格点双线性内插技术,构建出各块水深数据的DEM模型。然后,使用扩展块技术,解决了相邻块DEM的接边问题。最后,利用细节层次模型技术对所有DEM模型进行高效绘制,实现了海底地形的3维可视化。

Construction and Visualization of Submarine DEM Based on Large Number of Multibeam Data

Aiming at technical difficulty of multibeam data's organization and disposal,the text presented a technique of pretreatment adapting to large number of discrete soundings.At first,by building spasial index and using the technique of Delauny triangle net and bilinear interpolation,the submarine DEM was constructed with blocks.And then,in order to resolve the problem of adjacent blocks' border,the technique of extending block was used.At last,the 3D visualization of submarine DEM could be realized by using LOD to render all DEM.