Research on the possibility of using DJI Matrice 300 RTK with a Zenmuse P1 camera and DJI Mavic 3 Enterprise in work related to obtaining geometric data about buildings for the purpose of updating real estate cadaster and topographical database records

In Poland, regulations on technical standards for performing geodetic surveying do not specify any technical conditions for performing UAV flights and surveys. The choice of surveying technology and ensuring the required accuracy is the responsibility of the licensed surveyor. In this article, the Authors presented the results of an experiment on the possibility of using data from a DJI Matrice 300 RTK with a Zenmuse P1 camera and a DJI Mavic 3 Enterprise to carry out work related to obtaining building corners data for the purposes of updating the real estate cadaster and topographical object database. Experiments were carried out in the area of the Chrośla cadastral district (Dębe Wielkie commune, Mińsk Mazowiecki district, Masovian Voivodeship, Poland). The necessary surveying activities included: measurement of GCPs using the GNSS-RTN method in relation to the ASG-EUPOS reference stations network, UAV photogrammetric surveys, field surveys of selected building corners (tachymetric method and points of the surveying control points network established for this task, using the GNSS-RTN technique), and computational and analytical activities. Images acquired from the DJI Mavic 3 Enterprise had a GSD of 2.85 cm, and from the DJI Zenmuse P1– 1.5 cm. Selected building corners were measured in the images using the space intersection method (104 corners covering the test area evenly), and the results were compared with the field measurement (GNSS-RTN + tachymetry). The obtained results indicated the possibility of using UAV technology as a fully alternative to traditional geodetic surveys - meeting the accuracy criteria resulting from applicable legal regulations (under specific conditions).