【摘要】 通过对空间数据的拓扑一致性问题的分析,给出了一种基于拓扑的空间数据模型,在此基础上提出了一种空间拓扑规则发现机制。利用所得的空间拓扑规则,判断空间数据是否具有拓扑不一致性,进而采取相应的策略进行拓扑一致性维护,以提高空间数据的质量。更多还原

【Abstract】 Spatial topological relationships have impacts on spatial query and spatial analysis.This paper analyzes the current methods of describing topological relationships for spatial objects and proposes a novel method,which is based on topological data model,to discover the topological consistency for spatial objects.The mechanism is to define variation ratio by finding topological mode relations among objects,according to the mechanism,topology consistent rules used to check and maintain spatial consistency in the systems can be acquired.As a result,it also can improve the qualities of spatial query and analysis.更多还原