Geospatial Information Processing Method Based on Spherical Hexagon Grid System

摘要

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 data processing method 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 Quartemary 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 data processing method proposed in this paper can operate cell address codes directly and efficiently.