对于数据中的误差点（高程异常点），现有的算法中大多采用空间范围内计算是否发生高程的突变现象，以此来作为高程异常点的判断。关于图像中的粗差点进行剔除，主要包含四种方法便于选择。-For errors in the data point (elevation outliers), the existing algorithms they use to calculate whether a mutation within the spatial extent of the occurrence of the phenomenon of elevation, in order to determine elevation as outliers. About image blunders were removed, mainly contains four methods facilitate the selection.