Using Unmanned Laser Scanning and Aerial Photogrammetry for Potential Large-Scale Landslide Area Monitoring

Using drone aerial photogrammetry and LiDAR technology, we produced the geographic data layer for multiple potential large-scale landslide areas located in Taiwan. The mobility and flexibility of aerial mapping using drones have become an efficient method for modern topographic surveying and mapping. The advantage of using Unmanned Laser Scanning (ULS, UAV LiDAR) in building high-accuracy and high-detailed digital elevation models (DEM) is based on the use of laser pulses to pass through vegetation pores. The orthophoto produced by aerial photogrammetry allows for the identification of topographic surface features. Hence, the displacement and deformation data of the potential large-scale landslide can be determined.