| 在WEB-GIS环境下基于Hillbert曲线的空间查询优化方法 |
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| 引用本文： | 徐少文,徐少平.在WEB-GIS环境下基于Hillbert曲线的空间查询优化方法[J].九江学院学报,2008,27(6):12-15. |
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| 作者姓名： | 徐少文 徐少平 |
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| 作者单位： | [1]九江学院信息科学与技术学院,江西九江332005 [2]南昌大学信息学院,江西南昌330031 |
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| 基金项目： | 江西省教育厅科技资助项目(编号赣教技字(2007[27])号); 江西省教育厅科技资助项目(编号赣教技字(2008[35])号)资助 |
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| 摘 要： | 在WEB环境下的（Geographical Information System-GIS）的应用程序中,客户端的用户浏览空间对象集合具有明显的访问局部性。本文提出了一种在空间查询中利用H illbert曲线空间局部性特性预先提取空间数据的空间优化方法,该方法充分利用用户访问模式的特点大大提高了在空间数据库上执行空间查询的响应时间,最后给出了优化方法的算法伪代码以及在MAPGIS平台上的试验分析数据。
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| 关 键 词： | 空间局部性 空间查询 Hillbert曲线 查询优化 |
A NEW METHOD BASED ON THE HILLBERT CURVE FOR SPATIAL QUERY UNDER WEB-GIS ENVIRONMENT |
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| Xu Shaowen,Xu Shaoping.A NEW METHOD BASED ON THE HILLBERT CURVE FOR SPATIAL QUERY UNDER WEB-GIS ENVIRONMENT[J].JOurnal of Jiujiang University :Social Science Edition,2008,27(6):12-15. |
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| Authors: | Xu Shaowen Xu Shaoping |
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| Abstract: | In Web-enabled geographic information system application,it would be possible for user to navigate spatial objects which were located in small area.In other words,user access pattern bears 'spatial locality,and that neighborhood-based spatial queries such as k-nearest neighbor queries were mainly used in the area of spatial information retrieval.In this paper,we proposed a new prefetch policies based on Hillbert curve which could alleviate user response time under the assumption that user access pattern has... |
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| Keywords: | spatial access locality spatial query Hilbert Curve query optimization |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
