Damage Assessment and Recovery Monitoring of Atsuma Town from the 2018 Hokkaido-Eastern-Iburi Earthquake Using Multi-Temporal Airborne LiDAR Data

Abstract

This study demonstrates the use of multi-temporal LiDAR data to observe damage situations and to monitor recovery process in Atsuma Town, Hokkaido, Japan, after the 2018 Hokkaido-Eastern-Iburi earthquake. By taking the difference of the Digital Surface Models (DSMs) acquired from the LiDAR data in pre- and post-event times, landslides and damage to buildings and infrastructures were extracted and the results were compared with aerial optical images and the collapsed and accumulated soil areas from visual inspection. From the DSM difference between the post-event times, the recovery activities from the earthquake damage were also recognized in the 3D form.