The researchers analyze the slopes derived by different algorithms and conclude that the reasonable algorithms are those of three - order inverse distance square weight difference and three - order inverse distance weight difference 摘要分析了不同算法所提取坡度的最大值、标准差、坡度的分级面积数据、坡度提取所耗费的机器时间，提出在黄土丘陵沟壑区选用三阶反距离平方权差分和三阶反距离权差分算法较为合理。
