A Study on Unmanned Aerial Vehicle Applied to Acquire Terrain Information of Landslide

摘要

This research studied the application of UAV on collecting on-site environmental spatial data after the occurrence of disasters. Data of different time frames for a location was collected in this study, and the analysis of environmental change had been conducted. The data collected was used to compare the site environmental before and after a natural hazard. Terrain simulation was also generated to obtain additional understanding. The study results have shown that the application of camera-ready UAV (helicopter-type) and GPS can provide high-resolution images, which can be used to quickly produce 3D spatial image by stereographing. The image post-processing in this study used the site's feature points (obtained from previous site investigation) as control points, saving the time and labor of on-site investigation. This procedure is suitable for post-disaster response when quick response is needed. The images generated by the proposed method have average 5 meter error when targeting a landslide area, which is considerably acceptable and useful for estimating the hazard extent under emergency. The images can also be applied for 3D and flight simulation. The proposed method of processing 3D images can be done within one day after the disaster, when spatial data is available. The generated images can be used to assist the local government on the hazard impacts, and to provide the emergency response units information of status update and rescue use.