基于嵌入式数据库的移动GIS系统设计研究

Research of the System Design for Mobile GIS Based on Embedded Database

针对移动GIS平台的特点,设计并构建了一种基于嵌入式数据库的移动GIS系统。该系统的核心框架采用访问者设计模式设计空间索引接口,基于PackedR-tree的数据结构与算法实现空间索引,基于适配器设计模式实现对空间数据的一体化存储。实际应用表明,该系统可提高移动GIS的空间查询效率与存储能力,且具有较好的可扩展性和灵活性。

Based on embedded database,a favorable mobile GIS system structure suitable for mobile GIS platform was presented in this paper.In the core framework of this system structure,the spatial index interface is designed according to the visitor design pattern,the spatial index module is implemented by using the Packed R-tree data structure and algorithms;and based on the adapter design pattern,index structure and spatial data are accessed and persisted in the relational table.According to the application in our own GIS platform,the results indicate that it can improve query efficiency,enhance storage management ability,and is provided with better extensibility and flexibility.