IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2017  > Vol14 No.5
Automatic recognition of loess landforms using Random Forest method
ZHAO Wu-fan; XIONG Li-yang; DING Hu; TANG Guo-an
Corresponding AuthorXIONG Li-yang
Source PublicationJournal of Mountain Science
AbstractThe automatic recognition of landforms is regarded as one of the most important procedures to classify landforms and deepen the understanding on the morphology of the earth. However, landform types are rather complex and gradual changes often occur in these landforms, thus increasing the difficulty in automatically recognizing and classifying landforms. In this study, small-scale watersheds, which are regarded as natural geomorphological elements, were extracted and selected as basic analysis and recognition units based on the data of SRTM DEM. In addition, datasets integrated with terrain derivatives (e.g., average slope gradient, and elevation range) and texture derivatives (e.g., slope gradient contrast and elevation variance) were constructed to quantify the topographical characteristics of watersheds. Finally, Random Forest (RF) method was employed to automatically select features and classify landforms based on their topographical characteristics. The proposed method was applied and validated in seven case areas in the Northern Shaanxi Loess Plateau for its complex andgradual changed landforms. Experimental results show that the highest recognition accuracy based on the selected derivations is 92.06%. During the recognition procedure, the contributions of terrain derivations were higher than that of texture derivations within selected derivative datasets. Loess terrace and loess mid-mountain obtained the highest accuracy among the seven typical loess landforms. However, the recognition precision of loess hill, loess hill–ridge, and loess sloping ridge is relatively low. The experiment also showsthat watershed-based strategy could achieve better results than object-based strategy, and the method of RF could effectively extract and recognize the feature of landforms.
KeywordLandform Recognition Random Forest Feature Fusion Dem Loess Landform
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Document Type期刊论文
CollectionJournal of Mountain Science_Journal of Mountain Science-2017_Vol14 No.5
Recommended Citation
GB/T 7714
ZHAO Wu-fan,XIONG Li-yang,DING Hu,et al. Automatic recognition of loess landforms using Random Forest method[J]. Journal of Mountain Science,2017,14(5):885-897.
APA ZHAO Wu-fan,XIONG Li-yang,DING Hu,&TANG Guo-an.(2017).Automatic recognition of loess landforms using Random Forest method.Journal of Mountain Science,14(5),885-897.
MLA ZHAO Wu-fan,et al."Automatic recognition of loess landforms using Random Forest method".Journal of Mountain Science 14.5(2017):885-897.
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