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This paper deals with a test lead by Geomatics laboratory (DICEAM, Mediterranea University of Reggio Calabria), concerning the\udapplication of UAV photogrammetry for survey, monitoring and checking. The study case relies with the surroundings of the\udDepartment of Agriculture Sciences. In the last years, such area was interested by landslides and survey activities carried out to take\udthe phenomenon under control. For this purpose, a set of digital images were acquired through a UAV equipped with a digital camera\udand GPS. Successively, the processing for the production of a 3D georeferenced model was performed by using the commercial\udsoftware Agisoft PhotoScan. Similarly, the use of a terrestrial laser scanning technique allowed to product dense cloud and 3D models\udof the same area. To assess the accuracy of the UAV-derived 3D models, a comparison between image and range-based methods was\udperformed

3D MODELING WITH PHOTOGRAMMETRY BY UAVS AND MODEL QUALITY VERIFICATION