基于WGS-84椭球面的退化四叉树经纬线格网剖分

doi:10.11947/j.AGCS.2016.F004

摘要/Abstract

摘要： 针对数字地球的发展和解决全球问题的需求，给出了一种基于WGS-84椭球面的全球离散格网剖分方法——退化四叉树经纬线格网；分析了格网剖分的特点，明确了格网单元行列定义和经纬度坐标；计算出不同剖分层次格网单元面积、边长的变化情况并与基于正球面的剖分进行了对比。结果表明该格网系统具有粒度相对均匀性、层次嵌套性、方向一致性、地理条带性和对称性、广泛数据兼容性等许多优良特征，对构建全球地理信息系统具有一定的实用价值。

关键词: 退化四叉树经纬线格网, WGS-84椭球面, 全球离散格网, 格网, 层次剖分

Abstract: For the needs of digital earth development and solving many global problems, a new discrete global grid system-DQLLG (degenerate quadtree latitude/longitude grid) was put forward, which was based on WGS-84 ellipsoidal facet. The hierarchical subdivision method, characteristics and grid column/row coordinate system were detailed. The Latitude/Longitude coordinate, area and side length of multi-resolution meshes on different subdivision levels were calculated. Then the changes of mesh areas and side lengths were analyzed and compared that with spherical DQLLG. The research indicates that the DQLLG had many excellent features:uniformity, hierarchy, consistency of direction, extensive data compatibility and so on. It has certain practicality for Global GIS in the future.

Key words: degenerate quadtree latitude/longitude grid(DQLLG), WGS-84 ellipsoidal facet, discrete global grid(DGG), grid, hierarchical subdivision

中图分类号:

P208

胡佰林, 王春波, 赵学胜, 崔马军. 基于WGS-84椭球面的退化四叉树经纬线格网剖分[J]. 测绘学报, 2016, 45(S1): 32-39.

HU Bailin, WANG Chunbo, ZHAO Xuesheng, CUI Majun. Degenerate Quadtree Latitude/Longitude Grid Based on WGS-84 Ellipsoidal Facet[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(S1): 32-39.

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