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Proceedings Paper

A new index structure for global geospatial data
Author(s): Jin Ben; Xiao-chong Tong; Yong-sheng Zhang
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Paper Abstract

In recent years, the way to manage massive geospatial information of a global scale by Discrete Global Grid Systems (DGGSs) has attracted great attention. In this paper, a new geospatial data index structure is proposed. Firstly, planar multi-resolution hexagon grids are projected to spheres by Snyder Equal-area Polyhedral Projection to construct grid systems. Then, the spatial relationships between spherical hexagon grids are converted into spherical triangle quad-tree by quaternary groups of boundary vertexes. Additionally, extended Quarternary Triangular Mesh (QTM) encoding scheme is utilized in three-axis discrete grid coordinate systems to facilitate the transformation between geographic coordinates and cell address codes. Finally, cell analyzing and searching algorithm are proposed. Experimental results show that the index structure proposed in this paper can operate cell address codes directly and efficiently.

Paper Details

Date Published: 10 November 2008
PDF: 9 pages
Proc. SPIE 7146, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Advanced Spatial Data Models and Analyses, 714607 (10 November 2008); doi: 10.1117/12.813098
Show Author Affiliations
Jin Ben, Information Engineering Univ. (China)
State Key Lab. of Resource and Environmental Information System (China)
Xiao-chong Tong, Information Engineering Univ. (China)
Yong-sheng Zhang, Information Engineering Univ. (China)


Published in SPIE Proceedings Vol. 7146:
Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Advanced Spatial Data Models and Analyses

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