《Proceedings of 5th Asian Symposium on Geographic Information System from Computer Science & Engineering View》 2007年
Study on extracting method of single slope surface shape based on DEM:taking Wanzhou district of three gorges reservoir area as example
【摘要】：正This paper focused on the extracting method of single slope shape.Applying the software of ARCGIS 9. 0,DEM(digital elevation model)was established.From the DEM,topographic characters,including valleys and ridges were extracted.Some valley lines were extended in order to intersect with the ridges nearby.All slope were divided into different slope surface,which enclosed by valleys and ridges.And the slope surface shapes were defined three types,Line Slope,Upper-concave and lower-convex slope,Upper-convex and lower-concave slope,according to their functions.And the judge formula of single slope surface shape was brought forward.Taking Wanzhou Dis- trict as test area,it indicates that auto-extracting method of single slope surface shape has high precision relatively. This study can provide references to the studies of region geological disasters prevention and cure.