Aspekty aerotriangulacji zdjęć cyfrowych pozyskanych kamerą niemetryczną zamontowaną na pokładzie bezzałogowego statku latającego

Abstract. This article raises a problem of acquiring digital images form an amateur non metric camera on board an unmanned aerial vehicle. Within the research work on chosen blocks of images, an accuracy analysis of the aerialtriangulation allowing for the influence of additional parameters to increase accuracy adjustment was made. In the course of research, six independent adjustments were made. The first adjustment did not include additional parameters. The other adjustments included five additional parameters’ models: Bauer’s Simple Model, Jacobsen’s Simple Model, Ebner’s Orthogonal Model, Brown’s Physical Model and Lens Distortion Model, respectively.The legitimacy of using these additional parameters was determined by the low flight level in the range of tens of meters. The unfavourable dependence in this case is that the accuracy of the coordinates of the control points is much lower than the ground sampling distance on the images. In the course of research, an assumption was made that in the realization of these studies, in many cases the ground sampling distance is equal to or smaller than the accuracy of the coordinates of control points. On the basis of research concerning the accuracy of aerialtriangulation as well as the influence of additional parameters, it was found that correct adjustment of tested blocks required the use of a larger number of control points, when working with traditional airborne images. Moreover, the use of additional parameters adjustment can visibly increase accuracy of the determined point coordinated. Compared to the results of the alignment performed without taking into account additional parameters alignment using lens distortion model allowed us to increase the accuracy of aerial triangulation by 56% and 31% for the first and second block. However, the use of orthogonal model Ebner’a in the first case, slightly increased the accuracy of the alignment (about 9%), while the second block resulted in reduced accuracy of aerial triangulation (about 2%). This is due to the fact that this model was originally designed for studies images acquired analog cameras.