路政设施中时空数据模型的研究

Spatio-temporal data model of road equipment

对时空数据模型进行了研究,运用面向对象的方法分析路政设施中的时空数据,从时空对象的基本属性和行为出发,建立一个合适的时空数据模型,能够很好地封装对象的空间、专题、时间特征,表达时空对象的语义,满足一系列的查询要求。设计了标志标杆类的具体结构和存储方案,将时间作为独立的一维来处理,标记在对象属性上,减少了数据冗余,同时也为以后解决历史查询的问题提供了有效途径。

The spatio-temporal data model is studied, and the spatio-temporal data ofroad equipment is analyzed by the way ofobject-oriented. A proper spatio-temporal data model is built for road equipment by studying the basic attribute and behavior ofspatio-temporal objects. The spatial, thematic, and temporal attribute of objects is commendably encapsulated. The semantic element and suffices for the query are expressed. At the same time, the idiographic structure and storage method is designed. It views time as unique one-dimension and adds it to the object attribute, so it makes the less data redundancy. This can offer an efficient approach for solving historical query in the later work.