一种自适应的矢量数据增量更新方法研究

摘要

针对GIS增量更新中存在的一致性维护与空间冲突问题,提出一种自适应的矢量数据增量更新方法。以同名对象匹配为切入点,探讨变化对象的检测与增量更新的方式。在综合考虑空间距离,语义相似度及拓扑一致性约束的基础上,提出接边匹配度的计算方法并设计自适应的对象接边算法。同时,介绍矢量数据增量更新中基于约束规则的空间冲突检测与处理方法。并以矢量地形图试验数据验证文中所提出的模型与算法。%To maintain data consistency and eliminate the spatial conflicts brought by spatial database updating,an adaptive method for incremental vector data updating is proposed.Based on the matching of correspondent objects,a change-object detection and incremental updating method is discussed.Considering the constraint of spatial distance,semantic similarity and topology consistency,it is proposed a calculated method for edge matching evaluation.An adaptive edge matching strategy is also designed to maintain the consistency of spatial data.The rule-based detection and manipulation of spatial conflicts is also discussed.Topographical data are used to verify the practicality and efficiency of the method.