Working in partnership with LandScope Engineering, we recently carried out a visual inspection and survey of a dam in mid-Wales. The client needed  a high-definition model of the entire dam face for condition monitoring and defect inspection.

Our UAV is ideally suited to track back and forth across the dam face, from just above water level to the top of the dam, taking one image per second for the duration of the flight. During three flights, totalling 25 minutes, we captured more than 900 high-definition images from a distance of around 5 metres with an average sampling distance of 1.1mm. From this, we constructed a 3D pointcloud representation covering the entire dam to a resolution of around 1.5mm. We also created a set of high-resolution orthophotomosaics of selected areas of the dam face.