Use of Multi-Temporal LiDAR Data to Extract Collapsed Buildings and to Monitor Their Removal Process after the 2016 Kumamoto Earthquake

Autor:	Fumio Yamazaki, Wen Liu, Kei Horie
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	the 2016 Kumamoto earthquake collapsed building DSM difference building footprint building removal damage classification Science
Zdroj:	Remote Sensing, Vol 14, Iss 23, p 5970 (2022)
Druh dokumentu:	article
ISSN:	2072-4292
DOI:	10.3390/rs14235970
Popis:	This study demonstrates the use of multi-temporal LiDAR data to extract collapsed buildings and to monitor their removal process in Minami-Aso village, Kumamoto prefecture, Japan, after the April 2016 Kumamoto earthquake. By taking the difference in digital surface models (DSMs) acquired at pre- and post-event times, collapsed buildings were extracted and the results were compared with damage survey data by the municipal government and aerial optical images. Approximately 40% of severely damaged buildings showed a reduction in the average height within a reduced building footprint between the pre- and post-event DSMs. Comparing the removal process of buildings in the post-event periods with the damage classification result from the municipal government, the damage level was found to affect judgements by the owners regarding demolition and removal.
Databáze:	Directory of Open Access Journals
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