面向对象特征的城市空间数据库动态更新机制研究与实现

The research and realization of the object-oriented features of urban spatial databases dynamically updated mechanism

针对长期困扰城市空间数据库建设的"更新冲突"和"更新滞后"问题进行深入分析,在研究、借鉴前人的时空数据更新方法的基础上,根据城市规划空间数据实际生产特点,将时间维引入城市空间数据库,按照事件驱动思想,提出基于对象特征的数据动态更新模型和动态更新机制,解决数据管理与数据生产之间数据并发性更新需要,并能实现数据库不同历史时期版本输出问题。实验证明:该系统可以满足城市空间数据库动态更新的需要。

Long-standing urban spatial database construction of the ＂update conflict＂ and ＂slow update＂ are conducted in-depth. On the basis of the research space-time the previous data update methods, the Urban Planning actual production features, the introduction of time-dimensional urban spatial database, eventdriven thinking, and based on the object to the characteristics of data dynamically updated model and dynamic update mechanism, we solve data management and production data with data updates between the needs and to achieve different historical periods version of the database output problems. The experimental results show that：the urban spatial database system can meet the needs of dynamic update.