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Detecting Large-Scale Landslides Using Lidar Data and Aerial Photos in the Namasha-Liuoguey Area, Taiwan
Department of Civil Engineering, National Taiwan University, No. 1, Sec. 4, Rooservelt Road, Taipei 10617, Taiwan
Department of Earth Science, National Cheng Kung University, No.1, University Road, Tainan 701, Taiwan
Soil and Water Conservation Bureau, Council of Agriculture, Nantou 54044, Taiwan
* Author to whom correspondence should be addressed.
Received: 30 October 2013; in revised form: 21 November 2013 / Accepted: 9 December 2013 / Published: 19 December 2013
Abstract: Large-scale landslides often cause severe damage to lives and properties; therefore, their identification is essential in order to adopt proper mitigation measures. The objective of this study was to set up a methodological approach to help identify large-scale landslides using Lidar data, aerial photos and field investigation. The selected study areas were the Namasha and Liuoguey Areas in Kaohsiung City, Taiwan, both of which were severely hit by the Typhoon Morakot in 2009. The identification of large-scale landslides was performed based on Lidar high-resolution topographic information. The linear structures were mapped according to the shading map, with aspect in different azimuth to show good details of the structures. The scarps of the landslides were also identified. Validation of the results was done using both aerial photos and field investigations. In addition, stability analyses were performed on designated cases to further validate the results of Lidar identification.
Keywords: large-scale landslide; Lidar technique; shading map; scarps; stability analysis
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MDPI and ACS Style
Lin, M.-L.; Chen, T.-W.; Lin, C.-W.; Ho, D.-J.; Cheng, K.-P.; Yin, H.-Y.; Chen, M.-C. Detecting Large-Scale Landslides Using Lidar Data and Aerial Photos in the Namasha-Liuoguey Area, Taiwan. Remote Sens. 2014, 6, 42-63.
Lin M-L, Chen T-W, Lin C-W, Ho D-J, Cheng K-P, Yin H-Y, Chen M-C. Detecting Large-Scale Landslides Using Lidar Data and Aerial Photos in the Namasha-Liuoguey Area, Taiwan. Remote Sensing. 2014; 6(1):42-63.
Lin, Meei-Ling; Chen, Te-Wei; Lin, Ching-Weei; Ho, Dia-Jie; Cheng, Keng-Ping; Yin, Hsiao-Yuan; Chen, Mei-Chen. 2014. "Detecting Large-Scale Landslides Using Lidar Data and Aerial Photos in the Namasha-Liuoguey Area, Taiwan." Remote Sens. 6, no. 1: 42-63.