无控制DEM匹配与地表差异探测

摘要

Due to difficulties in building and maintaining control points,terrain change detection is difficult in the inundated area of debris-flow.Considering terrain feature,a new Digital Elevation Model (DEM) matching and deformation detecting method without control points is proposed.The experimental results based on real data sets,the multi-temporal DEMs of PUWAIGOU, validate the proposed method is practical for monitoring the terrain changes in the debris-flow area.%泥石流爆发地区控制点布设和维护困难,使得精确探测该类区域泥石流造成的地表变化非常困难.基于规则格网DEM(Digital Elevation Model),分析泥石流灾害的特点,提出了顾及地形特征的无控制DEM匹配与差异探测方法.根据不同时相DEM数据,利用该方法成功探测出普歪沟泥石流爆发区的地表水土流失变化.