Environmental Risk monitoring by Satellite, Lidar, Topographic and UAV photogrammetric survey techniques

In this work, several survey techniques and methodologies applied in a limestone quarry have been compared in order to describe the obtained accuracies, precisions, taken precautions, operative difficulties and costs. According to the Apulia regional mining and quarrying planning rules (Piano Regionale Attività Estrattive, PRAE) every year the quarries owners have to update the Quarry Cadastre Geographic Information System. To do this, some statistical schedules and topographic surveys are required for the PRAE Control and Management Office. Several surveys techniques have been applied using low cost instruments (Total Station and GNSS receiver) and other less cheaper ones that are a LiDAR and UAV photogrammetric surveys. For each method different algorithms have been used in order to build the Digital Terrain Models (DTM) which eventually have been compared. This analysis shows that these DTM obtained are almost perfectly comparable.