Determining changes in building tilts based on UAV photogrammetry
Katarzyna Strząbała, Paweł Ćwiąkała, Wojciech Gruszczyński, Edyta Puniach, Wojciech Matwij
Abstract
This paper presents the results of a study to determine the accuracy of changes in building tilts based on photogrammetry from unmanned aerial vehicles. The changes in building tilts are calculated from the relative horizontal displacements (HzDiff method) and from the changes in heights of selected points (VDiff). For both methods, the accuracy is analyzed using reference data collected by terrestrial laser scanning. The root mean square error of the estimated total changes in building tilts is 2.7 mm/m for the HzDiff method and 3.3 mm/m for the VDiff method. Both methods provide a rather general view of the scale of tilt changes caused by mining, but do not allow for a detailed analysis of the tilt changes of individual objects.