MEASUREMENT OF MICRO GROUND SURFACE ELEVATION BY A 3D CAMERA/SCANNER AND ITS APPLICATION TO FLOOD SIMULATION

Abstract

 The paper proposed a framework to mitigate the automobile damages due to flooding at large-scale carparking yard. First of all, the micro elevation of the car parking is measured using both 3D backpack type camera and 3D scanner; then processed to 1m resolution elevation data. Two prepared 1m resolution elevation data by camera and scanner were compared each other and with 5m resolution data by Geospatial Authorty of Japan (GSI). Then, two 1m resolution elevation data were merged to the 1m resolution data resampled from GSI 5m resolution data. Finally, the inundation simulation by a nesting method was applied to the two 1m resolution elevation data. As a result, inundation depth with the elevation data by 3D scanner showed relatively better performance than that by 3D camera. Likewise, the inundation depth can be reduced if the cars are placed on the high elevation area idenfitied by the 3D scanner.