Technology: general issues 11 History of engineering & technology 5 Structure from motion 5 photogrammetry 5 Research & information: general 4 History of engineering and technology 3 Research and information: general 3 3D modeling 2 Biology, life sciences 2 Computer vision 2 Photogrammetry 2 Remote sensing 2 Structure-from-Motion (SfM) 2 Structure-from-motion 2 UAS flight parameters 2 Unmanned Aerial System (UAS) 2 first-floor elevation (FFE) 2 flood risk reduction 2 3-D displacement 1 3D reconstruction 1 Accurate measurement 1 Aerial vehicle 1 Airborne imaging 1 Airborne laser scanning 1 Airborne laser scanning (ALS) 1 Aircraft detection 1 Antennas 1 Biodiversity 1 Calibration 1 Calibration procedure 1