ASSESSMENT METHOD OF BUILDING DAMAGE IN LUSHAN 7.0 EARTHQUAKE SICHUAN USING HIGH RESOLUTION AERIAL IMAGERY

摘要

A catastrophe earthquake with M=7.0 occurred on April 20, 2013 in Lushan, Sichuan Province, China. The buildings were seriously damaged, roads were broken and transportation was traffic disruption. After the earthquake happened, a lot of remote sensing images with the high resolution up to 0.2 meter were acquired at the same day. Data preprocessed were shared with the institutes in relatively short time for emergency rescue, disaster assessment, post-earthquake restoration and reconstruction. Based on these images, we carried out the group and single buildings damage degree identification, remote sensing damage index quick determination, earthquake losing assessment, thematic mapping, and so on. The paper begins with a brief discussion of the emergency response mechanism in Lushan earthquake about remote sensing data acquiring and sharing. The disaster characteristics of building in the aerial images are analyzed and summarized in the city, town or village, which distribute in the different earthquake intensity region, then the performance identification such as spectral, shape, texture and shadow was established. Furthermore, the paper presents a methodologies and results of losing assessment building based on the remote sensing.