2024 Volume 80 Issue 17 Article ID: 24-17167
LiDAR employing a green laser, which exhibits high underwater transparency, has been rapidly adopted for the measurement of coastal bathymetry. The green LiDAR scanner has become lighter and can be mounted to UAVs, thus it is anticipated that it will be used for measuring coastal areas in various environments. However, there are currently no technical guidelines for measuring coastal bathymetry using LiDAR from UAVs. Furthermore, there is a lack of clarity regarding the differences with other techniques such as narrow multibeam sonar using boats (NMB) and aerial laser bathymetry using airplanes (ALB). Here we aimed to comprehensive overview of the characteristics of each measurement method in terms of efficiency, depth limit, point cloud density, and footprint. Additionally, we show technical guidelines for coastal bathymetry using UAV-mounted green LiDAR were shown based on actual cases of the measurements. High-accurate and high-density coastal bathymetry data will substantially provide new insights of coastal morphological changes.
