ArcGIS中坡度坡长等地形因子分析过程.doc

ArcGIS中坡度坡长等地形因子分析过程地形因子LS制图过程DEM（1:5万）水文分析中进行填充（fill）填充后生产河流流向图填充后生成坡度图根据上图及公示生成坡度因子图con( Slope 5,10.8 * Sin(Slope) + 0.036,con(Slope 10,16.8 * Sin(Slope) - 0.5,21.9 * Sin(Slope) - 0.96)计算坡度因子过程图con( Slope = 10,21.9 * Sin(Slope * 3.1415926 / 180) - 0.96,16.8 * Sin(Slope * 3.1415926 / 180) - 0.5)求得的S因子图con(Slope 1,0.2,con(Slope 3,0.3,con(Slope 5,0.4,0.5)求得的M值图求得流向图，为了算是否为根二con(flowdir = 2 | flowdir = 8 | flowdir = 32 | flowdir = 128,1.414,1)Pow(90 * xiu / (Cos(Slope * 3.1415926 / 180)* 22.1),mfac)con( slope = 10,21.9 * Sin(slope * 3.1415926 / 180) - 0.96,16.8 * Sin(slope* 3.1415926 / 180) - 0.5)