【摘要】 通过对空间数据的拓扑一致性问题进行分析,提出了一种改进的基于规则的空间拓扑一致性维护模型,该模型通过定义拓扑规则和约束表达式进行拓扑一致性维护;作为进一步研究,采用版本化的技术将这种处理策略扩展到时空系统当中,以处理和维护时空系统中的时空拓扑一致性。这种基于规则的拓扑关系管理机制,有利于用户在局部检查拓扑关系以提高数据分析和处理的效率。更多还原

【Abstract】 The paper presents a novel view of spatiotemporal data consistency. A rule-based strategy is proposed to handle spatial topology semantic consistency. The rules are used to govern topological relations between pairs of objects as well as multiple objects in databases by defining rules and constraint expressions. As a further research, the strategy is extended to spatiotemporal systems by introducing versioned rules to maintain spatiotemporal consistency. The proposed techniques are useful for detectingtopology relation in local range and improving the efficiency of data analysis.更多还原