期刊论文

Li, Z.-M.(zhongmli@gmail.com)

中文

测绘学报

1001-1595

2008

37

4

489-494

10.3321/j.issn:1001-1595.2008.04.015

2004CB318206:国家重点基础研究发展计划（973计划） 2007AA122214:国家高技术研究发展计划（863计划）

本校为第一且通讯机构

结合基于对象存储技术,将地形数据按平面格网划分成若干个瓦片,每个瓦片映射为一个对象存储在基于对象存储系统中。根据地形瓦片之间的位置相关性,提出一种地形数据矢量基对分布策略,将多个瓦片对象分布在多个基于对象存储设备中,充分发挥基于对象存储系统的并行性。并采用分布模板的思想来实现矢量基对分布策略,减小运算的复杂度。该策略保证查询窗口在一定范围内每台基于对象存储设备最多只被访问一次,且响应时间恒定。

According to the object-based storage, the terrain data is divided into tiles in terms of the two-dimensional grid plane, and map each tile to an object stored in the object-based storage system. Furthermore, according to the location relativity of terrain tiles, a terrain data declustering method based on algebraic techniques using pair of base vectors is proposed to distribute the terrain tiles in multiple object-based storage devices, fully using the parallelity of object-based storage. And declustering module is used to reduce the complexity of operation in the declustering method. This me...