A modified HASM algorithm and its application in DEM construction

doi:10.1007/s12145-018-0341-y

	A modified HASM algorithm and its application in DEM construction
	Jiang, Ling 1; Zhao, Mingwei 1; Yue, Tianxiang 2; Zhao, Na 2; Wang, Chun 1; Sun, Jinglu 3
刊名	EARTH SCIENCE INFORMATICS
	2018-09-01
卷号	11 期号:3 页码:423-431
关键词	HASM Flow direction DEM Accuracy
ISSN号	1865-0473
DOI	10.1007/s12145-018-0341-y
通讯作者	Zhao, Mingwei(zhaomw@lreis.ac.cn)
英文摘要	In many spatial interpolation fields, high accuracy surface modeling (HASM) has yielded better accuracy than classical interpolation methods. The Gaussian equation is the core of the HASM algorithm; The current version of the HASM method builds the Gaussian equation in Cartesian coordinates and, computes the two partial derivatives of the surface in the horizontal and vertical directions for each grid. In this paper, a modified HASM method is proposed that integrates flow paths to improve the original HASM methodology. The modified HASM approach involves two steps. The first step generates an initial DEM, which is used to compute the flow path. Then, the second step is conducted based on scatter points and the flow direction. The output from this step is better than the initial DEM. First, we used a theoretical mathematical surface to validate the correctness of the modified model. Then, we chose a small study area where the topography is affected by hydrological erosion for analysis. The test results showed that the modified HASM method constructed a DEM with low MAE and RMSE values compared to those of traditional methods, and it more accurately characterized topographic features. Finally, a relatively gently sloping area was selected to validate that the applicability of the new method in other areas.
资助项目	Natural Science Foundation of China[41701450] ; Natural Science Foundation of China[41571398] ; Natural Science Foundation of China[41501445] ; Key Project of Natural Science Research of Anhui Provincial Department of Education[KJ2016A536] ; Research project on the application of public welfare Technology in Anhui Province[1704f0704064] ; Anhui Provincial Natural Science Foundation of China[1608085QD77]
WOS关键词	DIGITAL ELEVATION MODELS ; HIGH-ACCURACY ; SPATIAL INTERPOLATION ; VERIFICATION ; UNCERTAINTY ; DENSITY
WOS研究方向	Computer Science ; Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000441233500008
资助机构	Natural Science Foundation of China ; Key Project of Natural Science Research of Anhui Provincial Department of Education ; Research project on the application of public welfare Technology in Anhui Province ; Anhui Provincial Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/54540]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhao, Mingwei
作者单位	1.Chuzhou Univ, Anhui Ctr Collaborat Innovat Geog Informat Integr, Chuzhou 239000, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 3.Anhui Inst Econ, Hefei 230051, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Ling,Zhao, Mingwei,Yue, Tianxiang,et al. A modified HASM algorithm and its application in DEM construction[J]. EARTH SCIENCE INFORMATICS,2018,11(3):423-431.
APA	Jiang, Ling,Zhao, Mingwei,Yue, Tianxiang,Zhao, Na,Wang, Chun,&Sun, Jinglu.(2018).A modified HASM algorithm and its application in DEM construction.EARTH SCIENCE INFORMATICS,11(3),423-431.
MLA	Jiang, Ling,et al."A modified HASM algorithm and its application in DEM construction".EARTH SCIENCE INFORMATICS 11.3(2018):423-431.