针对数据更新中常见的河流偏离山谷线这一空间不一致问题, 提出了一种基于矢量投影法的快速、准确

地提取山谷点的方法, 并利用提取出的山谷点来检查与其相关河流的空间关系的一致性 最后利用VB6. 0+ MO实

现了该方法, 并进行了大量的数据测试, 取得了较好的效果。-In order to detect the spatial con flicts that rivers dev iate from the va lleys in the process o f topog raph ic database

updating, a new a lgor ithm using the vector pro jec tion m ethod to qu ick ly extrac t the va lley lines related to the r ivers is

proposed. B ased on the algorithm, am ethod to detect the inconsistency that rivers dev iate from va lleys is advanced. The

abov e algorithm has been imp lem ented by VB6. 0+ MO, and ach ieved the better effic iency.