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A DEM upscaling method with integrating valley lines based on HASM

文献类型：期刊论文

作者Zhao, Mingwei2,3,4,7; Ju, Xiaoxiao5; Zhao, Na1,6; Wang, Chun2,3,4,7; Xu, Yan2,3,4,7; Wu, Xiaoran1,6; Li, Weitao2,3,4,7
刊名FRONTIERS OF EARTH SCIENCE
出版日期2024-07-04
卷号N/A
关键词DEM upscaling HASM flow accumulation threshold surface complexity index
DOI10.1007/s11707-022-1068-0
产权排序3
文献子类Article ; Early Access
英文摘要A new digital elevation model (DEM) upscaling method based on high accuracy surface modeling (HASM) is proposed by combining the elevation information of DEM and the valley lines extracted from DEM with different flow accumulation thresholds. The proposed method has several advantages over traditional DEM upscaling methods. First, the HASM ensures the smoothness of the upscaled DEM. Secondly, several DEMs with different topographic details can be obtained using the same DEM grid size by incorporating the valley lines with different flow accumulation thresholds. The Jiuyuangou watershed in China's Loess Plateau was used as a case study. A DEM with a grid size of 5 m obtained from the local surveying and mapping department was used to verify the proposed DEM upscaling method. We established the surface complexity index to describe the complexity of the topographic surface and quantified the differences in the topographic features obtained from different upscaling results. The results show that topography becomes more generalized as grid size and flow accumulation threshold increase. At a large DEM grid size, an increase in the flow accumulation threshold increases the difference in elevation values in different grids, increasing the surface complexity index. This study provides a new DEM upscaling method suitable for quantifying topography.
WOS关键词DIGITAL ELEVATION MODELS ; DRAINAGE NETWORKS ; EXTRACTION ; ACCURACY ; RESOLUTION ; LIDAR
WOS研究方向Geology
WOS记录号WOS:001263103100006
源URL[http://ir.igsnrr.ac.cn/handle/311030/206067]  
专题资源与环境信息系统国家重点实验室_外文论文
通讯作者Zhao, Na
作者单位1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100101, Peoples R China
2.Anhui Ctr Collaborat Innovat Geog Informat Integra, Chuzhou 239000, Peoples R China
3.Chuzhou Univ, Sch Geog Informat & Tourism, Chuzhou 239000, Peoples R China
4.Chuzhou Univ, Geog Informat & Tourism Coll, Chuzhou 239000, Peoples R China
5.Capital Normal Univ, Coll Resource Environm & Tourism, Beijing 100048, Peoples R China
6.Chinese Acad Sci, State Key Lab Resources & Environm Informat Syst, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
7.Anhui Engn Lab Geoinformat Smart Sensing & Serv, Chuzhou 239000, Peoples R China
推荐引用方式
GB/T 7714		 Zhao, Mingwei,Ju, Xiaoxiao,Zhao, Na,et al. A DEM upscaling method with integrating valley lines based on HASM[J]. FRONTIERS OF EARTH SCIENCE,2024,N/A.
APA Zhao, Mingwei.,Ju, Xiaoxiao.,Zhao, Na.,Wang, Chun.,Xu, Yan.,...&Li, Weitao.(2024).A DEM upscaling method with integrating valley lines based on HASM.FRONTIERS OF EARTH SCIENCE,N/A.
MLA Zhao, Mingwei,et al."A DEM upscaling method with integrating valley lines based on HASM".FRONTIERS OF EARTH SCIENCE N/A(2024).

入库方式： OAI收割

来源：地理科学与资源研究所

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