2MOORE I D, GRAYSON R B, LADSON A R. Digital Terrain Modelling: A Review of Hydrological, Geomorphological, and Biological Applications [C]// Terrain Analysis and Distrituted Modelling in Hydrology. Chi Chester, UK: John Wiley& Sons, 1994:7-34.
3O'CALLAGHAN J F, MARK D M. The Extraction of Drainage Networks from Digital Elevation Data[J].Computer Vision, Graphics, and Image Processing,1984,28(4):323-344.
4JENSON S K, DOMINGUE J O. Extraction Topographic Structure from Digital Elevation Data for Geographic Information System Analysis [J]. Photogrammetric Engineering and Remote Sensing, 1988, 54(11):1593-1600.
5TARBOTON D G, BRAS R L, RODRIQUEZ I I. On the Extraction of Channel Networks from Digital Elevation Data [J]. Hydrologic Processes, 1991, 5(1):81-100.
9IIJIMA T. Basic Theory of Pattern Normalization (for the Case of a Typical One Dimensional Pattern) [J]. Bulletin of the Electrotechnical Laboratory. 1962(26):368-388.
10WITKIN A P. Scale Space Filtering [C]//International Joint Conference on Artificial Intelligence. Karlsruhe:[s.n.],1983:1019-1021.
3HARALICK R M.Ridge and valley on digital images[J].Computer Vision,Graphics and image processing,1983,22 (1):28-38.
4CHANG Y C,SONG G S,HSU S K.Automatic extraction of ridge and valley axes using the profile recognition and polygonbreaking algorithm[J].Computers and Geosciences,1998,24 (1):83-93.
