Abstract
In recent years, falling rock accidents have occurred frequently, and the momentum to tackle the rock fall prevention measures is increasing. However, in lots of the falling rock prevention measures, low resolution drawings are used. Therefore, the investigating falling rocks in the field and the accuracy of the position of the falling rock generation source are poor. There is a problem of missing a place where there is a danger of falling rocks.
In this paper, we utilize high density laser point cloud data using aircraft and create a map that emphasizes micro topography. This map is a transparent composition of the inclination amount map, the wavelet analysis diagram and the contour map together. We propose a method for extracting the falling rock origin with a high accuracy by using it. As a result of verifying the laser point cloud data in summer and winter, we could extract the falling rock generation source “cliff” by using measurement data of the longitudinal direction of the road in winter. This clarified that the proposed method is useful.
