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http://dx.doi.org/10.7780/kjrs.2021.37.5.1.17

The Relative Height Error Analysis of Digital Elevation Model on South Korea to Determine the TargetVertical Accuracy of CAS500-4  

Baek, Won-Kyung (Department of Geoinformatics, University of Seoul)
Yu, Jin-Woo (Department of Geoinformatics, University of Seoul)
Yoon, Young-Woong (Department of Geoinformatics, University of Seoul)
Jung, Hyung-Sup (Department of Geoinformatics, University of Seoul)
Lim, Joongbin (Forest ICT Research Center, National Institute of Forest Science)
Publication Information
Korean Journal of Remote Sensing / v.37, no.5_1, 2021 , pp. 1043-1059 More about this Journal
Abstract
Forest and agricultural land are very important factors in the environmental ecosystem and securing food resources. Forest and agricultural land should be monitored regularly. CAS500-4 data are expected to be effectively used as a supplement of monitoring forest and agricultural land. Prior to the launch of the CAS500-4, the relative canopy height error analysis of the digital elevation model on South Korea was performed to determine the vertical target accuracy. Especially, by considering area of interest of the CAS500-4 (mountainous or agricultural area), it is conducted that vertical error analysis according to the slope and canopy. For Gongju, Jeju, and Samcheok, the average root mean squared differences were calculated compared to the drone LiDAR digitalsurface models, which were filmed in autumn and winter and the 5 m digital elevation model from the National Geographic Information Institute. As a result, the Shuttle radar topography mission digital elevation model showed a root mean squared differences of about 8.35, 8.19, and 7.49 m, respectively, while the Copernicus digital elevation model showed a root mean squared differences of about 5.65, 6.73, and 7.39 m, respectively. In addition, the root mean squared difference of shuttle radar topography mission digital elevation model and the Copernicus digital elevation model according to the slope angle were estimated on South Korea compared to the 5 m digital elevation model from the National Geographic Information Institute. At the slope angle of between 0° to 5°, root mean squared differences of the Shuttle radar topography mission digital elevation model and the Copernicus digital elevation model showed 3.62 and 2.52 m, respectively. On the other hands root mean squared differences of the Shuttle radar topography mission digital elevation model and the Copernicus digital elevation model respectively showed about 10.16 and 11.62 m at the slope angle of 35° or higher.
Keywords
CAS500-4; radar topography mission; Copernicus digital elevation model;
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Times Cited By KSCI : 2  (Citation Analysis)
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