| 地形数据对象存储组织方式及其分布策略研究 |
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| 引用本文： | 李忠民,喻占武.地形数据对象存储组织方式及其分布策略研究[J].测绘学报,2008,37(4):0-520. |
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| 作者姓名： | 李忠民 喻占武 |
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| 作者单位： | 武汉工业学院,电气信息工程系,湖北,武汉,430023;武汉大学,测绘遥感信息工程国家重点实验室,湖北,武汉,430079;武汉大学,测绘遥感信息工程国家重点实验室,湖北,武汉,430079 |
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| 基金项目： | 国家973计划资助项目
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国家863计划资助项目
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| 摘 要： | 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。
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| 关 键 词： | 地形数据 基于对象存储 分布策略 矢量基对 |
Terrain Data Object Storage Mode and Its Declustering Method |
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| LI Zhong-min,YU Zhan-wu.Terrain Data Object Storage Mode and Its Declustering Method[J].Acta Geodaetica et Cartographica Sinica,2008,37(4):0-520. |
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| Authors: | LI Zhong-min YU Zhan-wu |
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| Institution: | LI Zhong-min1,2,YU Zhan-wu11.Department of Electric Information Engineering,Wuhan Polytechnic University,Wuhan 430023,China,2.State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079,China |
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| Abstract: | 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 method enables every object-based storage device only accessed no more than once and guarantees the invariableness of response time on a certain extension of query windows. |
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| Keywords: | terrain data object-based storage declustrering method pair of base vectors |
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