Study on Interpretation of Rain-Induced Group Shallow Landslides Based on Multi-Period SPOT-5 Remote Sensing Images
LI Tiefeng2) XU Yueren3) PAN Mao3),4) CONG Weiqing3) WEN Mingsheng2) LIAN Jianfa2) (2)China Institute of Geo-environmental Monitoring, Beijing,100081; 3)School of Earth and Space Sciences, Peking University, Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, Beijing,100871 )
During time from June 17-23 in 2005, an extraordinary storm event happened in Jian’ou city, Fujian province; it induced lots of small and medium scale shallow landslides. This paper describes the treating process to getting fusion SPOT-5 images using geometric correction, spatial calibration, image enhancement, data fusion and other processing methods based on panchromatic and multi-spectral SPOT-5 images before and after the event, takes the method of comparative analysis using the fusion images and field survey to gain the key interpretation to getting the total information of 2 186 landslides. The paper also gets the 92 percent of field affirming exactness using field validation method by choosing 300 interpreted landslides randomly from the all of 2186 ones at last. According to the research, using fusion SPOT-5 images in the application of abstraction of small and medium scale landslide information is available.