非均匀适应性球体退化八叉树剖分地球圈层空间格网

Non-uniform Adaptable Spheroid Degenerated-Octree Subdivides Outline of Earth Science Spatial Girds

适应性球体退化八叉树剖分算法解决了地球半径及球面维度的分辨率非均匀变化问题,但是该算法在单独细分的方向上仍是均匀的,无法解决在球面或者径向分辨率非均匀变化的问题。本文在适应性球体退化八叉树的基础上,提出了使用非均匀适应性球体退化八叉树剖分地球圈层空间格网的方法。并以地壳、地幔和地核的空间格网为例,阐述剖分理论、剖次计算公式和剖次计算过程。实验表明:该算法可有效地减少低分辨率数据处的空间格网冗余。

Adaptable spheroid degenerated-octree solved the problem of the earth＇s radius and spherical resolution changing non-uniformity. But the algorithm is still uniform in the direction of individual subdivision, which can not solve the problem of non-uniform resolution in the spherical or radius. On the based of adaptable spheroid degenerated-octree, this paper presents the method of non-uniform adaptable spheroid degenerated-octree subdivides outline of earth science spatial girds. This paper describes the subdivision theory, the calculation formula and process of subdivision level, taking the subdivision spatial girds of the earth crust, mantle and core as an example. Experiments show that the algorithm greatly reduces spatial girds redundancy at low resolution data.