| 基于分布式GIS的一种矢量数据查询优化方法 |
| |
| 引用本文： | 尚艳玲,徐旭东.基于分布式GIS的一种矢量数据查询优化方法[J].国土资源遥感,2008,19(3):100-103. |
| |
| 作者姓名： | 尚艳玲 徐旭东 |
| |
| 作者单位： | 1. 北京工业大学计算机学院,北京,100022;安阳师范学院,安阳,455000
2. 安阳师范学院,安阳,455000 |
| |
| 摘 要： | 分布式GIS的海量数据和有限带宽的网络资源之间矛盾日益突出，远程矢量数据的查询和海量数据传输成为解决问题的关键。在分析海量数据查询特点的基础上，结合空间数据库中数据层的查询优化方法和代价函数，提出了一个在客户端定义并使用代价函数优化动态规划的矢量数据查询方法，同时在客户端实现数据拓扑差查询。实践证明，该方法能够有效提高查询速度和保持全局网络负载的良好性能。
|
| 关 键 词： | 分布式GIS 查询优化 代价函数 |
| 收稿时间： | 2008-01-19 |
| 修稿时间： | 2008-03-19 |
AN OPTIMIZATION METHOD FOR INQUIRY OF VECTOR DATA BASED ON DISTRIBUTED-GIS |
| |
| SHANG Yan-Ling,XU Xu-Dong.AN OPTIMIZATION METHOD FOR INQUIRY OF VECTOR DATA BASED ON DISTRIBUTED-GIS[J].Remote Sensing for Land & Resources,2008,19(3):100-103. |
| |
| Authors: | SHANG Yan-Ling XU Xu-Dong |
| |
| Institution: | 1. Department of Computer, Beijing University of Technology, Beijing 100022, China； 2. Anyang Normal University, Anyang 455000， China |
| |
| Abstract: | The contradiction between massive Distributed-GIS data and limited bandwidths of network resources is becoming more and more serious,and the inquiry of distant vector data and the transmission of massive data have become the key to the problem.Based on analyzing the method of massive data inquiry,combined with the query optimized method of spatial database and cost function,the authors propose a vector data inquiry method which is optimized and can be transplanted to the client and realize the data inquiry of topologic differences.Experiments have proved that this method is effective in improving the inquiry speed and maintaining a good network-load performance. |
| |
| Keywords: | Distributed-GIS Query optimization Cost function |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《国土资源遥感》浏览原始摘要信息 |
| 点击此处可从《国土资源遥感》下载免费的PDF全文 |
