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	A high speed method of SMTS
	Chen C. F. ; Yue T. X. ; Li Y. Y.
	2012
关键词	DEM Interpolation method Resolution Accuracy digital elevation models interpolation methods dem construction terrain analysis accuracy error quality splines systems scale
英文摘要	In order to improve the computational speed of the method of surface modeling based on the theorem of surfaces (SMTS), a modified Gauss-Seidel (GS) method (MGS) was introduced and a MGS of SMTS (SMTS-MGS) has been developed. Numerical tests show that SMTS-MGS is more than twice as fast as SMTS-GS and much faster than the classical iterative methods provided by MATLAB 7.0. The computing time of SMTS-MGS is proportional to the first power of the total number of grid cells in the computational domain, whereas the classical SMTS computing time is proportional to the third power of the total number of grid cells. A real-world example of constructing a series of DEMs of Dongzhi tableland was employed to comparatively analyze the simulation accuracies of the two versions of SMTS including SMTS-MGS and the classical SMTS, and the well parameterized classical interpolation methods including the inverse distance weighted technique (IDW), kriging, thin plate spline (TPS), regularized TPS, TPS with tension, and ANUDEM Version 4.6.3, at spatial resolutions of 5, 12, 20, and 25 m. The real-world example demonstrates that SMTS-MGS with the same accuracy as SMTS is approximately as accurate as the third-order TPS and much better than other classical interpolation methods at almost all spatial resolutions, except for ANUDEM at a spatial resolution of 5 m. On average, SMTS-MGS provides the best results with a minimum of computing time. (C) 2011 Elsevier Ltd. All rights reserved.
出处	Computers & Geosciences
卷	41
页	64-71
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/311030/26960]
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.,Li Y. Y.. A high speed method of SMTS. 2012.

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