The use of UAV for expedited procedures in architectural survey

The use of drone photogrammetry can today be considered among the faster procedures for detecting spaces and architectural objects. Possibility offered by aerial shots and consequent image processing, within threedimensional model return programs, through automatic photogrammetry SfM (Structure from Motion), speeds up operations that until a few years ago required a much more complex acquisition process. Also, in this process, as in all techniques for detecting and/or organizing data on an object, multiple procedural steps must be taken into consideration, aimed at perfecting the “level of accuracy” and the “level of reliability” of the derived model. These activities must be very clear in the drafting of the project, upstream of the image recording phase, thus realizing a careful planning of the operations to be carried out in the survey campaign. Equally clear should be selective activities of data collected by the drone and integrated with data from other technologies, which generally always complement such data (total station, laser scan, etc.).