Construction of rhombic triacontahedron discrete global grid systems  

作　　者：Xiaoyu Liang Jin Ben Rui Wang Qishuang Liang Xinhai Huang Junjie Ding 

机构地区：[1]PLA Strategic Support Force Information Engineering University,Zhengzhou,People’s Republic of China

出　　处：《International Journal of Digital Earth》2022年第1期1760-1783,共24页国际数字地球学报（英文）

基　　金：supported by the Special Science Fund for Innovation Ecosystem Construction of National Supercomputing Center in Zhengzhou[grant no 201400210100];the National Key Research and Development Program of China[grant no 2018YFB0505301].

摘　　要：Discrete Global Grid System(DGGS)is a new multi-resolution geospatial data modeling and processing scheme for the digital earth.The icosahedron is commonly regarded as an ideal polyhedron for constructing DGGSs with small distortions;however,the shape of its face is triangular,making it difficult to incorporate the matrix structure used for geospatial data storage and parallel computing.To overcome this limitation,this study utilizes the rhombic triacontahedron(RT)as the basic polyhedron to construct DGGSs.An equal-area projection between the surface of RT and the sphere is developed and used to design a grid-generation algorithm for the aperture 4 hexagonal DGGS based on RT.Compared with the equal-area DGGS based on the icosahedron,the proposed scheme results in smaller angular projection distortions,with the mean and standard deviation decreasing by 41.6%and 30.9%,respectively.The grid cells of the RT DGGS also achieve more optimized geometric characteristics in shape compactness,length deviation,and angle deviation than those in the icosahedron DGGS.Additionally,the cross-surface computation efficiency provides advantages in code conversion to latitude and longitude and proximity queries.Furthermore,the use of RT offers a new and better framework within the context of DGGS research and application.

关 键 词：Discrete global grid system rhombic triacontahedron equal-area projection HEXAGON 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]