中文摘要：

针对定量过滤法剔除伪增量时存在的真增量被过度过滤、伪增量不能完全过滤等缺陷,结合国家1∶5万数据库更新工程的实际需求,提出一种新的伪增量剔除方法——拓扑量化法,主要思想是结合拓扑空间关系判断与缓冲区量化分析来识别伪增量,进而得到更加准确的增量信息。

英文摘要：

Spurious increments exists inevitably in the results of difference operator because of data inconsistency in the process of increments recognition, and it has reduced the accura- cy of change. The existing methods using quantitative threshold, lead to true increments o- ver-removed and spurious increments not recognized, and reduce the accuracy of the results. With the heavy demands in updating of National Spatial Database at scale of 1 ： 50 000, a new method called topological quantitatively method is proposed, which integrates topologi- cal relations and buffer analysis to remove the spurious increments of area water. The experi- mental results show that the proposed method is valid and has stronger practicality.