| 嵌入式GIS中电子地图数据模型和查询优化问题的研究 |
| |
| 引用本文： | 李陶深,李比. 嵌入式GIS中电子地图数据模型和查询优化问题的研究[J]. 航空计算技术, 2007, 37(2): 95-98 |
| |
| 作者姓名： | 李陶深 李比 |
| |
| 作者单位： | 广西大学,计算机与电子信息学院,广西,南宁,530004;广西大学,计算机与电子信息学院,广西,南宁,530004 |
| |
| 摘 要： | 对基于掌上电脑的嵌入式电子地图系统中查询优化问题进行研究,构造基于掌上电脑平台环境下多尺度数字地图的数据模型,建立一种适用于嵌入式GIS系统的四叉树空间索引,以提高空间查询的效率;提出了一种优化嵌入式GIS系统中的数据访问方法.系统应用结果表明:改进的四叉树可提高空间查询的效率,数据优化方法可加快电子地图显示和查询的速度.
|
| 关 键 词： | 嵌入式GIS 掌上电脑 电子地图 四叉树 查询优化 |
| 文章编号： | 1671-654X(2007)02-0095-04 |
| 修稿时间： | 2006-09-23 |
Research on Data Model and Query Optimization of Electronic Map in Embedded GIS |
| |
| LI Tao-shen,LI Bi. Research on Data Model and Query Optimization of Electronic Map in Embedded GIS[J]. Aeronautical Computer Technique, 2007, 37(2): 95-98 |
| |
| Authors: | LI Tao-shen LI Bi |
| |
| Abstract: | The problem of query optimization of electronic maps in embedded GIS based on handheld PC is studied.The data model of multi-scale digital maps based on handheld PC platform is built.An improved quadtree applying to the embedded GIS to improve the search efficiency of the whole quadtree is designed,and a method of optimizing the data access is proposed.The application results show that the improved quadtree can increase the search efficiency of the whole quadtree and methods of data optimization can quicken the speed of the electronic map display and searching. |
| |
| Keywords: | embedded GIS handheld PC electronic map quadtree query optimization |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
