Estimation of Ground Movement Using Multi-temporal Data from Airborne LiDAR

By image matching method using multi temporal LiDAR-DEM, we measured the movement of landslide in two districts where the translational landslides had occurred in different conditions of topography and vegetation. The results of applying this method were consistent with the motion vector from the GPS measurement results of the current position. The horizontal displacement of 10 cm or more is detectable when using one meter grid size DEM. A classification due to the characteristics of the slope deformation can be performed based on the displacement vectors of the ground surface. The occurrence of ground fissures is able to foresee from the large difference of displacement, and the area classification of stress field is able to determine based on displacement vectors. This new method is effective to analysis of slope movement and for planning disaster mitigation. By repeated investigation by airborne laser scanner, it is possible to monitor the slope movement in large area.