The positional accuracy of photogrammetric block is influenced by a number of ground control points used in the adjustment. In the thesis we checked if it was possible to achieve comparable accuracy of the photogrammetric block with fewer ground control points between an unmanned aerial vehicle (UAV) equipped by GNSS RTK receiver and IMU (Inertial measurement unit) and an aircraft without such equipment. The area where we made measurements was established by a geodetic network of points, which represent the ground control points and check points in the adjustment of the photogrammetric block. The selected photogrammetric block was examined twice. Firstly we considered the RTK measurements, yet the second time we did not take those into consideration. During the adjustment of the photogrammetric block we considered different numbers of ground control points. The accuracy of the photogrammetric block in which we considered RTK measurements was later compared with the accuracy of the photogrammetric block where the RTK measurements were not considered. In each case of the adjustment we used a different number of ground control points. In the analysis, we compared the accuracy of the photogrammetric block using different numbers of ground control points.
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