FINE-SCALE RESOLUTION COASTAL TOPOGRAPHIC AND BATHMETRIC MAPPING

To predict and prevent natural disaster such as inundation at the coastal area, the offer of precise forecast and hazard map is necessary. The accuracy of inundation prediction and hazard map is preliminarily determined by the coastal geospatial information's accuracy among other factors. Considering the characteristic of coastal area as an intertidal zone, it has always changed following by the tide and wave having the coexistence of connection sea and land. Thus, there are not exist sufficient geospatial information in the established topographic and bathymetric data. Therefore, we have measured topography and surveyed bathymetry using terrestrial LiDAR and MBES to make precise and fine-scale resolution coastal map. For the geo-referencing of these two kinds of data, we have done Network-RTK and tide measurement. After unify x, y, z coordinate system, we have constructed accurate fine-scale resolution coastal mapped DEM and DSM through the integration of LiDAR and MBES data with registering other supplementary data. Now it has used to input data for the numerical inundation model and hazard map. It can also possible to use monitoring and analysis of beach process such as an erosion/deposition through cyclic long-term measurement considering with the artificial beach transition based on GIS-based 3D spatial analysis.