空间N4I拓扑模型的构建

Building of the N4I Spatial Topological Model

空间拓扑关系的描述与操作是GIS的重要基础,在GIS中起着举足轻重的作用,同时也是GIS区别于其它图形系统的重要标志。为了弥补9 I模型中目标的补过大,难以操作的缺点,文中提出了N4 I模型,不仅保留了原9 I模型的优点,而且可以解决9 I模型所不能解决的许多问题。该模型中目标的边界、内部均可表达或操作,所以适合进行空间分析,构建新的GIS查询分析功能。

The description and operation of the spatial topological relation in the spatial relation are important basis of the GIS,which play an critical role in the GIS and simultaneously are crucial marks of the GIS differing from other graphical systems.In order to compensate disadvantages of the 9I model,i.e.big object complement and difficulty of operation,the N41 model is provided in the paper,which not only remains the advantages of the former 9I model,but also could solve many problems that can not be solved in the 9I model.Since the boundary and interior of the object can all be expressed or operated,the model is suitable for use to make spatial analysis and create new GIS-inquiring and analyzing functions.