TIN的海底地形复杂度表示与计算方法

Seabed Terrain Complexity Representation and Computation Method for TIN

针对当前海底地形复杂度表示与计算方法存在的适用性不强,无法全面反映地形复杂程度等问题,面向海底地形的Delaunay不规则三角网表示模型,基于微分几何理论,使用节点1-邻域内相邻三角面片空间几何关系及三角面片在水平面上的投影面积,提出一种基于双二面角的海底地形复杂度的表示与计算模型,并在多个实验样区上对所提出方法进行实验。结果表明,相比目前常用的其他海底地形复杂度表示与计算方法,该方法能够适用于不同的海底地形,且更符合人类认知。

Considering the issue of insufficient applicability and insufficient expression of the start-of-the-art seabed terrain complexity representation and calculation methods,a new representation and computation model for seabed terrain complexity on TIN is represented in this paper.Based on differential geometry theory,dihedral angle between two triangle meshes and their projection areas on the horizontal plane in the vertex’s first-order neighborhood are used in this model to form the seabed terrain complexity index.The results of experiments on multi regions show that the presented method has advantages both in its stronger applicability over multiple Submarine-DEMs and its better consistency with human cognition compared with other common-used existing methods.