Data Collection System for a Rapid Recovery Work: Using Digital Photogrammetry and a Small Unmanned Aerial Vehicle (UAV)

Photog-CAD® is software to aid prompt operations from conducting surveys to making designs and estimated expense for recovery in the collapsed area of slopes and river revetments caused by natural disaster. This software is intended to make a design and an estimate based on the 3D models created by processing pictures of the collapsed site from three directions using a close-photogrammetric technique. However, when taking pictures from the ground, there are many restrictions which often make the use of this software difficult. This research paper proves that it is efficient to use an unmanned aerial vehicle (UAV) which can take photographs from the sky above and reports a case study in which we efficiently conducted a survey using Photog-CAD® with the UAV, and made a design, estimate, and documents for the budget request.