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

作　　者：李青[1] 李青元[2] 刘孝璐 魏竹斌 LI Qing;LI Qingyuan;LIU Xiaolu;WEI Zhubin(School of Geomatics,Liaoning Technical University,Fuxin 123000,China;Chinese Academy of Surveying and Mapping,Beijing 100830,China;Dalian Jinyuan Survey Technology Co.,Ltd.,Dalian 116600,China;College of Geosciences and Survey Engineering,China University of Mining ＆ Technology（Beijing）,Beijing 100083,China)

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]中国测绘科学研究院,北京100830 [3]大连金源勘测技术有限公司,辽宁大连116600 [4]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《测绘与空间地理信息》2018年第9期82-85,88,共5页Geomatics & Spatial Information Technology

基　　金：国家自然科学基金项目(41272367)资助

摘　　要：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.

关 键 词：适应性球体退化八叉树 地球圈层 空间格网剖分 非均匀 

分 类 号：P209[天文地球—测绘科学与技术]