Accuracy assessment of the ASTER GDEM and SRTM3 DEM：an example in the Loess Plateau and North China Plain of China

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	Accuracy assessment of the ASTER GDEM and SRTM3 DEM：an example in the Loess Plateau and North China Plain of China
	Zhao, SM ; Cheng, WM ; Zhou, CH ; Chen, X ; Zhang, SF ; Zhou, ZP ; Liu, HJ ; Chai, HX
刊名	INTERNATIONAL JOURNAL OF REMOTE SENSING
	2011
卷号	32 期号:23 页码:8081-8093
通讯作者	Zhou, CH
英文摘要	The digital elevation model (DEM) produced by the Shuttle Radar Topographic Mission (SRTM) has provided important fundamental data for topographic analysis in many fields. The recently released global digital elevation model (GDEM) produced by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) has higher spatial resolution and wider coverage than the SRTM3 DEM, and thus may be of more value to researchers. Taking two typical study areas-the Loess Plateau and the North China Plain of China-as an example, this article assesses the accuracy of the SRTM3 DEM and ASTER GDEM by collecting ground control points from topographical maps. It is found that both the SRTM3 DEM and the ASTER GDEM are far more accurate for the North China Plain than for the Loess Plateau. For the Loess Plateau, the accuracy of the ASTER GDEM is similar to that of the SRTM3 DEM; whereas for the North China Plain, it is much worse than that of the SRTM3 DEM. Considering the negative bias of the ASTER GDEM for flat or gentle regions, we improve its accuracy by adding the difference of the mean value between the SRTM3 DEM and ASTER GDEM for the North China Plain; then, the root mean square error (RMSE) of +/- 7.95 m from the original ASTER GDEM is improved to +/- 5.26 m, which demonstrates that it is a simple but useful way to improve the accuracy of the ASTER GDEM in flat or gentle regions.
收录类别	SCI
资助信息	Chinese National Natural Science Fund 40871177 40830529
公开日期	2012-10-26
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/26975]
专题	地理科学与资源研究所_研究生部
推荐引用方式 GB/T 7714	Zhao, SM,Cheng, WM,Zhou, CH,等. Accuracy assessment of the ASTER GDEM and SRTM3 DEM：an example in the Loess Plateau and North China Plain of China[J]. INTERNATIONAL JOURNAL OF REMOTE SENSING,2011,32(23):8081-8093.
APA	Zhao, SM.,Cheng, WM.,Zhou, CH.,Chen, X.,Zhang, SF.,...&Chai, HX.(2011).Accuracy assessment of the ASTER GDEM and SRTM3 DEM：an example in the Loess Plateau and North China Plain of China.INTERNATIONAL JOURNAL OF REMOTE SENSING,32(23),8081-8093.
MLA	Zhao, SM,et al."Accuracy assessment of the ASTER GDEM and SRTM3 DEM：an example in the Loess Plateau and North China Plain of China".INTERNATIONAL JOURNAL OF REMOTE SENSING 32.23(2011):8081-8093.