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Article

Evaluating the Vertical Accuracy of DEM Generated from ZiYuan-3 Stereo Images in Understanding the Tectonic Morphology of the Qianhe Basin, China

1
College of Geological Engineering and Geomatics, Chang’an University, Xi’an 710064, China
2
College of Land Engineering, Chang’an University, Xi’an 710064, China
3
Shaanxi Key Laboratory of Land Consolidation and Rehabilitation, Xi’an 710064, China
4
School of Geography, Geomatics and Planning, Jiangsu Normal University, Xuzhou 221116, China
5
School of Electrical and Information Engineering, Tianjin University, Tianjin 300072, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Tomaž Podobnikar
Remote Sens. 2021, 13(6), 1203; https://doi.org/10.3390/rs13061203
Received: 14 February 2021 / Revised: 12 March 2021 / Accepted: 18 March 2021 / Published: 22 March 2021
(This article belongs to the Special Issue Advances in Global Digital Elevation Model Processing)
Currently available high-resolution digital elevation model (DEM) is not particularly useful to geologists for understanding the long-term changes in fluvial landforms induced by tectonic uplift, although DEMs that are generated from satellite stereo images such as the ZiYuan-3 (ZY3) satellite include characteristics with significant coverage and rapid acquisition. Since an ongoing analysis of fluvial systems is lacking, the ZY3 DEM was generated from block adjustment to describe the mountainous area of the Qianhe Basin that have been induced by tectonic uplift. Moreover, we evaluated the overall elevation difference in ZY3 DEM, Shuttle Radar Topography Mission (1″ × 1″) (SRTM1), and Reflection Radiometer Global Digital Elevation Model (ASTER GDEM) by using the Ice Cloud and Land Elevation Satellite/Geoscience Laser Altimeter (ICESat/GLAH14) point cloud and a DEM of 1:50,000 scale. The values of the root mean square error (RMSE) of the elevation difference for ZY3 DEM were 9.31 and 9.71 m, respectively, and are in good agreement with SRTM1. The river long profiles and terrace heights were also extracted to compare the differences in channel steepness and the incision rates with SRTM1 and ASTER GDEM. Our results prove that ZY3 DEM would be a good alternative to SRTM1 in achieving the 1:50,000 scale for DEM products in China, while ASTER GDEM is unsuitable for extracting river longitudinal profiles. In addition, the northern and southern river incision rates were estimated using the ages and heights of river terraces, demonstrating a range from 0.12–0.45 to 0.10–0.33 m/kyr, respectively. Collectively, these findings suggest that ZY3 DEM is capable of estimating tectonic geomorphological features and has the potential for analyzing the continuous evolutionary response of a landscape to changes in climate and tectonics. View Full-Text
Keywords: Qianhe Basin; ZY3 stereo imagery; DEM; active tectonic Qianhe Basin; ZY3 stereo imagery; DEM; active tectonic
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MDPI and ACS Style

Liu, Z.; Han, L.; Yang, Z.; Cao, H.; Guo, F.; Guo, J.; Ji, Y. Evaluating the Vertical Accuracy of DEM Generated from ZiYuan-3 Stereo Images in Understanding the Tectonic Morphology of the Qianhe Basin, China. Remote Sens. 2021, 13, 1203. https://doi.org/10.3390/rs13061203

AMA Style

Liu Z, Han L, Yang Z, Cao H, Guo F, Guo J, Ji Y. Evaluating the Vertical Accuracy of DEM Generated from ZiYuan-3 Stereo Images in Understanding the Tectonic Morphology of the Qianhe Basin, China. Remote Sensing. 2021; 13(6):1203. https://doi.org/10.3390/rs13061203

Chicago/Turabian Style

Liu, Zhiheng, Ling Han, Zhaohui Yang, Hongye Cao, Fengcheng Guo, Jianhua Guo, and Yiqi Ji. 2021. "Evaluating the Vertical Accuracy of DEM Generated from ZiYuan-3 Stereo Images in Understanding the Tectonic Morphology of the Qianhe Basin, China" Remote Sensing 13, no. 6: 1203. https://doi.org/10.3390/rs13061203

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