【作者】 柴晓路； 曹晶； 施伯乐；

【Author】 Chai Xiaolu,Cao Jing,Shi Baile (Computer Science Department,Fudan University,Shanghai,200433,China)

【机构】 复旦大学计算机科学系；

【摘要】 本文就地理信息系统中空间对象信息的存贮模式做了一些探讨,对时空信息数据库中空间对象存贮管理提出了一个信息存贮的层次模型,将空间对象的存贮划分为三层:广义模式,全局模式和主题模式,并通过视图模式提供用户访问空间信息的界面.广义模式提供对所有空间对象在一个时间轴上的统一表示,全局模式作为信息表示的中间层次简化了空间对象的的分割和重组过程,有利于用户对空间对象的快速访问.主题模式为空间对象的最上层划分,能统一归整同类型空间对象的存贮.更多还原

【Abstract】 The storage modal of spatiotemporal data in Geographic Information System(GIS) was discussed in this paper.To get high-performance data accessing in GIS,a hierarchical model for spatiotemporal data presentation and storage,which is consisted of four levels:general level,global level,theme level and view level,is provided.The general level,global level and theme level are for logical presentation and physical storage,and the view level is for logical presentation only.The general level provides uniform presentation for spatial objects by a standard time axis.The global level,as the mediate level in data presentation,simplifies the decomposition and recomposition for spatial data,which can lead to fast data access and easy level transformation.The theme level classifies the spatial object according the objects’ original type,which is a semantic level.Lastly, the view level provides the data access interface for end-user.更多还原