연안해역 수로측량을 위한 드론 수심 라이다 정확도 연구

This study investigates the accuracy of drone-based bathymetric LiDAR (Light Detection And Ranging) technology for hydrographic surveying in coastal waters. The research was conducted in Wonpyeong Beach, Samcheok, Gangwon Province. Various depths and environmental conditions of the coastal area were measured using a drone to collect data, which was then compared with checkpoint survey results and electronic navigational charts to verify the quality. The comparison with checkpoint survey results showed a maximum error of 0.08m and an RMSE (Root Mean Squared Error) of 0.04m, meeting the RMSE standard of 0.25m stipulated by the guidelines for the construction and management of digital elevation models. The comparison with electronic navigational chart depths revealed an average depth difference of 0.05m in shallow waters and 0.14m in deeper waters. These results demonstrate that drone-based bathymetric LiDAR technology can be a valuable alternative for hydrographic surveying in shallow coastal areas. However, considering the decrease in accuracy in deeper waters, further research is needed to address the limitations and potential improvements of the technology at greater depths.