Abstract
The aim of this paper is to present a comparative analysis of the results obtained by UAV photogrammetry on the calibration polygon "Debeljača", and by using two different software systems: AgiSoft PhotoScan and Trimble INPHO UASMaster. The paper presents the impact analysis and the potential evaluation of errors in the UAV photogrammetric block, obtained by DSLR - Digital Single-Lens Reflex amateur digital camera with unknown internal orientation and unknown distortion values. Blocks were formed using SfM - Structure from Motion approach, implemented in given software systems. A large number of reliable control points on the calibration polygon enabled the analysis of error propagation in the block for different scenarios of distribution of the ground control points, as well as the assessment of the geometric quality of the formed models.
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