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Landform classification based on landform geospatial structure-a case study on Loess Plateau of China

International Journal of Digital Earth 2022年第1期15卷 1125-1148页

作者： Siwei Lin Jing Xie Jiayin Deng Meng Qi Nan Chen Key Laboratory of Spatial Data Mining & Information Sharing Ministry of EducationFuzhou UniversityFuzhouPeople’s Republic of China The Academy of Digital China (Fujian) Fuzhou UniversityFuzhouPeople’s Republic of China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingPeople’s Republic of China University of Chinese Academy of Sciences BeijingPeople’s Republic of China

Landform classification,which is a key topic of geography,is of great significance to a wide range of fields including human construction,geological structure research,environmental governance,*** studies of landform classification generally paid attention to the topographic or texture information,whilst the watershed spatial structure has not been *** study developed a new landform classification method based on watershed geospatial *** abstracting the landform into the internal and marginal structure,we adopted the gully weighted complex network(GWCN)and watershed boundary profile(WBP)to simulate the watershed geospatial *** various indices to quantitatively depict the watershed geospatial structure,we conducted the landform classification on the Northern Shaanxi of Loess Plateau with a watershed-based strategy and established the classification *** classified landform distribution has significant spatial aggregation and clear regional *** accuracy reached 89%and the kappa coefficient reached 0.87%.Besides,the proposed method has a positive response to some similar and complex *** general,the present study first utilized the watershed geospatial structure to conduct landform classification and is an efficient landform classification method with well accuracy and universality,offering additional insights for landform classification and mapping.

关键词： DEM landform classification geomorphological mapping watershed geospatial structure complex network

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