基于地理实体的道路网络面向对象数据模型研究

摘要

城市交通迅速发展,道路网络呈现出空间结构复杂、数据量大、时效性强等特点.本文讨论了传统路网模型的特点,顾及道路的信息完整性、数据冗余性、管理高效性3个指标,研究了以道路实体为基本元素的路网模型;运用面向对象技术对路网模型进行了数据建模,并通过动态交通信息更新机制对路网的动态属性进行管理;构建了城市道路实体化实验系统,验证了该模型的有效性和可行性.%With the rapid development of urban traffic,the characteristics of road network,including complex spatial structure,large amount of data and high real-time,have appeared.Theoretically,the characteristics of traditional network models are discussed.Besides,taking into account the road information integrity,data redundancy and managementefficiency,the model based on the road entity as the basic element is studied.In addition,the data model of road network is constructed by the object-oriented technology,and the dynamic traffic information update mechanism is designed to manage the dynamic properties.Practically,thetest systemof urban roads is constructed to verify the effectiveness and feasibility of the model.