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[D5-04] Another approach to terrain mapping method utilizing Unmanned Surface Vehicle and Light Detection and Ranging at shallow water area: A case study at Budai Port’s expansion sand filling project site.

*Amrico Hanafie¹, Kuan-Tsung Chang², Sheng-Yu Yu³ (1. Master student, Dept. of Civil Eng. and Environmental Informatics, Minghsin Uni. of Science and Technology, 2. Corresponding author, Professor, Dept. of Civil Eng. and Environmental Informatics, Minghsin Uni. of Science and Technology, 3. Company, Manager, Strong Engineering Consulting Co.)

Keywords:3D Terrain Models, LiDAR, USV, Shallow water scanning

LiDAR is a great tool to capture the terrain map in a wide range in a short time, however there is one problem ground Light Detection and Ranging or known as LiDAR has, it cannot penetrate below surface of water. Especially in the shoreline, lake, swamp, shallow water area. LiDAR most definitely feasible to scan the area however not under the water, thus where Unmanned Surface Vehicle, USV for short aiding the terrain mapping process. A small boat, small enough to be able to collect data close enough to surface up to 15cm of depth water while carrying a single beam. By taking a look at data that gathered at Budai Port’s expansion sand filling project site both by USV and LiDAR, the data taken at the same time with a 3 different set of time period. This utilization of two tools will be explained in detail, combining together to create new terrain mapping method that is more efficient and viable in rough terrain.