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The paper presents an innovative approach of combining the methods of close-range photogrammetry and remote sensing in the analysis of the efficiency of photovoltaic parks. A UAV was used to capture the site and close-range photogrammetry technology was used to create orthoimages in the thermal and visible zone. Orthoimages obtained from close-range photogrammetry imagery were combined, and the resulting multichannel image was analysed with remote sensing methods. Spatially overlapping RGB and thermal orthoimages are collocated and a multispectral image was created. Cluster analysis of the multispectral image was performed. Using remote sensing methods, a four-channel multichannel image was created and classified through supervised classification approach with predefined masks. The training data for the classifier represents the types of defects found on the photovoltaic panels. The obtained results were analysed and an assessment of the classification was made.

The following paper aims to test and evaluate the accuracy of UAV data for volumetric measurements to the conventional GNSS techniques. For this purpose, an appropriate open pit quarry has been chosen. Two sets of measurements were performed. Firstly, a stockpile was measured by GNSS technologies and later other terrestrial GNSS measurements for modelling the berms of the quarry were taken. Secondly, the area of the whole quarry including the stockpile site was mapped by a UAV flight. Having considered how dynamic our world is, new techniques and methods should be presented in numerous fields. For instance, the management of an open pit quarry requires gaining, processing and storing a large amount of information which is constantly changing with time. Fast and precise acquisition of measurements regarding the process taking place in a quarry is the key to an effective and stable maintenance. In other words, this means getting an objective evaluations of the processes, using up-to-date technologies and reliable accuracy of the results. Often legislations concerning mine engineering state that the volumetric calculations are to present ±3% accuracy of the whole amount. On one hand, extremely precise measurements could be performed by GNSS technologies, however, it could be really time consuming. On the other hand, UAV photogrammetry presents a fast, accurate method for mapping large areas and calculating stockpiles volumes. The study case was performed as a part of a master thesis.