摘要
山脊与沟谷一样具有明显的等级层次结构,但目前对山脊线的层次等级特征描述存在缺失。该文结合现有的沟谷等级划分方案,综合考虑山脊线与沟谷线的耦合关系,提出了一种山脊线等级划分的方法。通过在黄土丘陵沟壑区的实验显示,该方法简单易行,分级结果合理。该研究可望完善现有对地貌形态特征描述的方法,也为等高线及DEM的自动简化与综合提供重要的条件。
Ridge lines have hierarchical structure which is similar to the hierarchical structure of ravine lines, but previous studies ignore researches on this. Based on streamline classifying methods, considering the coupling relationship between ridges and ravines,a convenient grading method has been proposed. This method has been applied to the loess hilly region in Shanxi Province and the results are reasonable. This method is proved to be of high value and improvement in both theory and methodology of terrain simplification based on DEM.
出处
《地理与地理信息科学》
CSSCI
CSCD
北大核心
2011年第2期30-33,F0003,共5页
Geography and Geo-Information Science
基金
国家自然科学基金重点基金项目"基于DEM的黄土高原地貌形态空间格局研究"(40930531)
国家自然科学基金项目"基于DEM的黄土高原流域边界剖面谱研究"(40901185)
关键词
DEM
山脊线
流域分水线
分级
DEM
ridge lines
basin dividing lines
gradation
