The research presented in this paper took place in Resita City, Caras-Severin County, on an area of approximately 80 hectares for the realization of the graphic updating documentation in the Land Book. To accomplish this, a DJI Phantom 4 Pro UAV device was used together with a Leica Viva GS16 GNSS equipment. If initially the drones (UAV - Unmanned Aerial Vehicle) were manufactured and used exclusively in the field of defense, their cost amounting to several millions of dollars, today there are many variants on the market, including small and cheap drones, which can be controlled with the smartphone and can be successfully used in photogrammetry. In the last decade, the use of unmanned aerial vehicles has become increasingly popular for a wide range of disciplines and scientific applications, given that drones can be technical means for: surveillance of high-speed areas; monitoring of forests and natural phenomena that occur in them; damage assessment after certain natural disasters; observing and alerting the authorities about the victims of unfortunate events; observing and evaluating the growth and harvesting of agricultural products in the field of agriculture; filming and observing certain races and artistic or sporting events, etc. Currently, many photogrammetric mapping methods have used drones to retrieve and record data about objects on earth. This is because the drone use the Global Navigation Satellite System (GNSS) and Inertial Measurement Unit (IMU) for air metering and is more efficient and cheaper compared to the chartering of a plane, it also allows flying over difficult areas and significantly reduces the execution time of the work. From a technical and technological point of view, in the cadastral domain, in the last decades, there has been a remarkable progress. From theodolite, used to measure horizontal and vertical angular directions, to the total station, at present, the ground surface can be "scanned" and measured with non-pilot aircraft, commonly referred to as drones. The use of UAV in geospatial science is currently in high demand due to its relatively easy operation and relatively affordable cost compared to satellite systems, especially high resolution images. One of the benefits of using drones is to take aerial photos that are then processed for mapping so that they can be used to support spatial data acquisition.

UAV, GNSS, Photogrammetry, Land Book, Caras-Severin County

environmental engineering

Presentation: poster