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基于直角多边形近似的空间连接查询 被引量:4

Spatial Join Query Based Orthogonal Polygons Approximation
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摘要 空间查询效率是衡量空间数据库性能的关键 ,而空间连接查询是最耗时、最重要的空间查询 .本文在分析了空间连接以往工作的基础上 ,采用一种新的空间近似方法——直角多边形近似 ,改进空间对象的近似精度 ,并用于基于 R树的空间连接方法 ,给出了连接算法 ,并用实验验证了方法的有效性 . Efficiency of spatial query is the key to evaluate the performance of spatial databases. Spatial join is the most time-consuming and important query. After analyzing the previous researches on the spatial join, this paper introduced a new method, orthogonal polygons, to approximate actual spatial data in spatial access methods and, to join spatial relation based on R-trees, an algorithm for spatial join was given. The experiment reveals the flexibility of the methods.
出处 《上海交通大学学报》 EI CAS CSCD 北大核心 2001年第2期279-282,共4页 Journal of Shanghai Jiaotong University
关键词 空间连接 空间存取方法 R树 空间数据库 Data acquisition Database systems Query languages Trees (mathematics)
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参考文献7

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