城市规划信息系统的时空数据组织方案

从时态GIS出发,分析了城市规划时空对象的内容、时间因素和属性表达问题。论文采用了面向对象的方法,探讨了数据标识方法和属性、空间图形时态数据组织。将版本信息标注在对象属性表的字段上,带有版本号的对象能清楚地表达对象来源和结构关系,直接表达了同一个对象的不同时期的属性值。给出了面向对象管理的时空数据组织结构,将当前状态中的对象与过去不同时间的对象相关联,每个版本与其前后版本相连接。这种数据组织机制方便了对象的版本集合或单个版本的存取。时态通过在对象标识上附加的时间标志方式而实现,线性组织了几何对象的版本序列,构造了时态拓扑关系。在节省存贮空间的同时,提高了数据利用率和历史事件的查询效率。

The Research of Temporal Spatial Data Organization for the Urban Planning Information System

In this paper the content,time factor and expression way in the field of Urban Planning are analyzed. The author of this paper introduces an object-oriented approach, analyses the data mark way and attributes, and spatial graphics temporal data organizing. Marking the version information on object attribute tables, the object marking with version information can describe the object source and structure relationship, then the approach can describe the attribute values of an object in different periods directly. The expression way of object-oriented temporal spatial data organization is advanced, the organization can associate the object in current and past times, also can associate the version in the front and behind. This data organization way is a convenient version integration and single version accessing. The temporal GIS is realized by the time mark in the object table, the version serial of geometric object is linearily organized and the temporal topology relationship is constructed. This approach improves the efficiency of data using and history l event query, and also assures the continual development of the Urban Planning System with the data storage space saved.