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	A method of DEM construction and related error analysis
	Chen C. F. ; Yue T. X.
	2010
关键词	DEM Error Surface modelling Terrain representation digital elevation models interpolation techniques terrain models grid dems accuracy slope uncertainty microscale resolution systems
英文摘要	The concept and the computation of terrain representation error (ETR) are investigated and total DEM error is presented as an accuracy index for DEM evaluation at a global level. A promising method of surface modelling based on the theorem of surfaces (SMTS) has been developed. A numerical test and a real-world example are employed to comparatively analyze the simulation accuracy of SMTS and the classical interpolation methods, including IDW, SPLINE and KRIGING performed in ARCGIS 9.1 in terms of sampling and interpolation errors and of total DEM error. The numerical test shows that SMTS is much more accurate than the classical interpolation methods and ETR has a worse influence on the accuracy of SMTS than those of the classical interpolation methods. In a real-world example, DEMs are constructed with SMTS as well as the three classical interpolation methods. The results indicate that, although SMTS is more accurate than the classical interpolation methods, a real-world test indicates that there is a large accuracy loss. Total DEM error composed of, not only sampling and interpolation errors, but also ETRs can be considered as a good accuracy measure for DEM evaluation at a global level. SMTS is an alternative method for DEM construction. (C) 2010 Elsevier Ltd. All rights reserved.
出处	Computers & Geosciences
卷	36
期	6
页	717-725
收录类别	SCI
语种	英语
ISSN号	0098-3004
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/24263]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Chen C. F.,Yue T. X.. A method of DEM construction and related error analysis. 2010.

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