A New Index Structure for Global Geospatial Data

作者：Ben Jin^*; Tong Xiao Chong; Zhang Yong-sheng

来源：Geoinformatics 2008 and Joint Conference on GIS and Built Environment - Advanced Spatial Data Models and Analyses, Guangzhou, PEOPLES R CHINA, 2008-06-28 To 2008-06-29.

DOI：10.1117/12.813098

• Geospatial information
• hexagon
• grid system
• index
• searching

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.

• 出版日期2009
• 单位资源与环境信息系统国家重点实验室; 中国人民解放军信息工程大学