【摘要】 为进一步提高R-tree的空间索引数据检索性能,提出一种基于R-tree的MRD-tree索引,它的结构中包含空间对象的外部近似图形和内部近似图形,同时允许数据入口存放在中间结点。在检索时既能减少I/O次数,也能相对减少一定的CPU时间。通过实验分析,该索引能提高空间数据的检索效率。更多还原

【Abstract】 To further enhance the R-tree spatial index data retrieval performance,a MRD-tree index is presented based on R-tree,which contains both external approximate shape and internal approximate shape of spatial object,and it is allowed that the data entry stores in middle nodes.The number of I/O and the cost time of CPU are reduced during the search by the index,and a series of tests indicate that the MRD-tree index improves the query efficiency of spatial data.更多还原