Utilization of an Unmanned Aerial Vehicle and Echo-Sounder for Shoreline Surveying

Park, J.K. and Jung, K.Y., 2021. Utilization of an Unmanned Aerial Vehicle and echo-sounder for shoreline surveying. In: Lee, J.L.; Suh, K.-S.; Lee, B.; Shin, S., and Lee, J. (eds.), Crisis and Integrated Management for Coastal and Marine Safety. Journal of Coastal Research, Special Issue No. 114, pp. 410–414. Coconut Creek (Florida), ISSN 0749-0208. The shoreline is a baseline that defines the shape of the national territory or defines the borders of the seas between countries, and it is important geospatial information to be managed by the nation for international and legal responses. In addition, importance is increasing day by day as a guideline for various laws that determine the spatial scope of the land, coast, and ocean, and closely related to people's lives. In this study, geospatial information was constructed using UAV (Unmanned Aerial Vehicle) and echo-sounder to investigate shoreline changes. UAV was used to survey the coastal area during ebb tide, and echo-sounder was used to measure areas where UAV is not applicable and to integrate with UAV data. The data surveyed by UAV was processed to create a DSM(Digital Surface Model) and ortho image. And echo-sounder was used for depth measurement during high tide, and was used to construct geospatial information for coastal areas by integrating with UAV data. As a result of the study, geospatial information about the study area could be constructed. The UAV results showed X, Y, and H deviations within 5.5 cm compared to the check point survey results using GNSS and it suggesting the possibility of using the results. The shoreline variation survey should be conducted from the existing “line concept” survey to the “plane concept” survey. In this regard, the result of integrating UAV and echo-sounder will be a way to effectively build plane data through data processing. Shoreline change survey using UAV and echo-sounder can be used to establish and manage standardized shoreline data and establish predictable mid- and long-term national maritime policies through continuous shoreline survey. In addition, it will help effective business execution as data for the execution of major marine policies such as coastal management and marine safety.