This paper presents a case study about smart scanning with UAV Technologies. The case study was carried out at the Metropolitan Cathedral of Timisoara, which is located near the city center, adjacent to the Bega Canal. The scope of this study was to take part of the cathedral’s renovation by helping pinpoint the optimimum location for placing its new illuminating system. Since the cathedral is also a hystorical monument, by law, we first needed to scan the bulding and compare the new values we have with the old ones in order to determine if some areas needed to be repaired/restored first. Once there, all scannings and surveys were made using: GPS Leica G08, DJI Phantom 4, Leica 3D ScanStation C10. To process all data gathered, we used AgiSoft FotoScan and CloudCompare. The method used was georeferencing using Ground Control Points. A total of 18 GCP were taken, all of which were placed strategically inside the area of survey of 19,1 acres for the drone to easily see them. The total flight time was 4 minutes and it flew to an altitude of 84m with an result of 130 images. Using all data points gathered we obtained our point cloud. In order to execute this project, several criteria must be taken into consideration, for exampleThe Metropolitan Cathedral of Timisoara (Figure.1) is one of the most expensive buildings in the city and one of the most famous architectural monuments in our country. The Catedral impresses by its significant dimensions, by the architectural specificity and by the enameled tiles. The additional work consists in adding illumination of the Cathedral’s façade to highlight the enameled tiles which shine beautifully when light is reflected on them. Due to the growing interest in updating geodata - mainly 3D data and cadastral data as basis for GIS and mapping applications - there is a demand for a fast and efficient surveying method that combines data acquisition with additional information such as images, orthoimages, 3D-models of buildings and infrastructure, and elevation models. One possibility for such a fast and efficient capture of georeferenced data is the use of UAV systems (Unmanned Aerial Vehicles). Second possibility is 3D scanning because it allows detailed analysis of a building no matter how complex the architecture, no matter what form it would have and no matter how unconventional it would be. Using the scanned data, any intervention on the building can be planned. We can perform 3D laser scanning for buildings, monuments, heritage buildings, archaeological sites, civil constructions, industrial constructions and installations, volume monitoring. For the project mentioned above we used both 3D scanning and UAV technology.

UAVs, Surveying, Measurement, Mapping, Planning, Modelling, High Resolution, Sustainable, 3D Scanning

environmental engineering

Presentation: oral