Abstract
Use of UAVs (Unmanned Aerial Vehicles) during disasters and normal times has become widespread. They are utilized in diverse cases, for example, to grasp the situations of sediment disasters or for bridge inspection. In i-Construction, active application of UAVs to construction management is expected using aerial photo-grammetry by UAV. Regulations on i-Construction prescribe the required degree of precision for the results acquired by aerial photogrammetry made by UAVs based on the existing trial results. However, since the measurement conditions vary from site to site, it is necessary to achieve the similar degree of precision under different conditions. In this paper, we investigate the influence degrees of error factors and their occurrence conditions in aerial photogrammetry, and propose a measurement method for the purpose of construction man-agement. Then we verify the measurement precision attained with this method at the actual sites.
