Quantitative study of a generic model of complexity taking into account topographic features
Terrain complexity is an important parameter of digital terrain analysis,lack of unified standards,a universal terrain digital description model thus is proposed.In this paper,15 typical geomorphological test areas are selected,and the DEM is used to calculate the affinity degree of slope topographic factors to screen out the best model parameters.The weights are determined through factor analysis,and then the terrain complexity model is constructed.The model comparison of different terrains and the comprehensive geomorphological visualisation are combined to illustrate the accuracy and universality of the terrain complexity model.The results show a strong relationship between terrain complexity and terrain features:TCI＜0.1 is the plain or basin terrain,0.1 ≤ TCI＜0.8 is the hilly terrain,0.8 ≤ TCI＜1.8 is the highland terrain,and TCI ≥ 1.8 is the mountainous terrain.The experimental validation shows positive correlation between terrain complexity and altitude and mountain scale.In addition,this paper provides practical guidance for topographic and geomorphological research,ecological and environmental impacts and regional development evaluation.
digital elevation modeltopographic complexityslope factortopographic featuresquantitative studyfactor analysis
万方数据
维普
