4[2]Davis J C.Statistics and Data Analysis in Geology[M].3rd Edition.New York:John Wiley ＆ Sons,2002.
5[8]陈健飞.地理信息系统导论[M].北京:科学出版社,2004
6[10]Gandner T.W.,Sasowsky K.C.,Day R.L.Automated ex-traction of geomorphometric properties from digital eleva-tion data[J].Zeitschrift fur Geomorphologie Suppl,1990,v80:57-68.
7汤国安，刘学军．DEM及其在地学中的应用[M]．北京：科学出版社，2005．
8Davis J C. Statistics and data analysis in geology, 3rd edition [M]. New York: John Wiley & Sons, 2002.
9Band. Topographic partition of watershed with digital elevation models [J]. Water Resources Research, 1986,22(1):15-24.
