The process begins with aerial triangluation, which allows for a precise georeferenced pixel image, in both altitude and planimetric coordinates, from the UAV flight parameters (position and altitude) and from correlation points between successive images.<br /> The result is a dense point cloud from which is extracted a digital surface model. It first recreates the relief of the area of interest, then an orthoimage of the reference projection system area (Lambert 93) to the desired spatial resolution.
Two operators are present, the first operates the UAV and the second is in charge of associated safety measures. Once the UAV takes off, it automatically travels the area thanks to the pre programming (made upstream during the preparing flight phase). With our UAVs’ performance, we can cover 40 hectares in just 20 minutes.
We determine the fill sector, the redevelopment area, the extraction sector edges and the repair areas. These deliverables are certified by a professional geometer.