基于栅格DEM自动划分微观地貌形态的研究

Research on the Automated Classification of Micro Landform Based on Grid DEM

系统分析了微观地貌形态的划分标准体系和方法,认为微观地貌形态的划分是宏观地貌形态划分的延续。基于栅格DEM和DTA技术实现微观地貌形态分类的关键在于提取地形地貌因子和制定合理的分类决策方案,以土壤侵蚀研究中的临界坡度值为参考,改进了DRAGUT提出的山体部位划分的分类决策方案;并采用黄土高原的局部DEM,进行了微观地貌形态分类的实验研究。

The automatic classification of micro morphological landform has different systems and standards in different research fields. The micro morphologic landform classification is considered the extension of macro landform morphologic classification. The key to the classification of micro morphologic landform based on DEM and DTA lies in that they extract landform factors and make reasonable decisions. The focus of this investigation is on Dragut＇s research about the hill classification. The slope threshold in soil erosion research was referenced and Dragut＇s hill classification decision was improved. The experiment based on the improved hill classification decision was carried out using local grid DEM of Loess Plateau.