地形描绘方法在黄土丘陵沟壑地区的应用

本文探讨了地形描绘方法在地学中的应用效果。通过在山西黄土丘陵沟壑地区描绘河流沟网分布的多种比较计算可知,利用数字高程模型,用离散余弦变换进行小分面拟合以及导数分析,并注意选择适当小的拟合分面和在可能条件下提高信息源的分辨率,就可以得到较好的结果。这项工作对于产生地理信息系统数字地形模型的派生数据源是有意义的。

The Use of Topographic Sketch Method in the Region of Loess Hilly Ravine Land

This paper describes experiments of the use of topographic sketch method in the region of Sanchuan river basin, Shanxi province, this basin is a region of loess hilly ravine land. Better results can be obtained when following choices are employed: using the discrete cosine transformation facet; smaller window size; DEM from better resolution data.The experiment shows that the topographic sketch method is practicable for extraction of ravine network or basin network from DEM and able to use it for geographic information system.