In this thesis, we analyzed the accuracy and usability of the Urban Atlas data layers produced within the Copernicus program. For the study area, we selected the functional urban area of Ljubljana. The research was based on two comparisons: the Urban Atlas land cover layer for the reference year 2018 with the reference land use data of Ministry of Agriculture, Forestry and Food for 2017, and the Urban Atlas building height layer for 2012 with height data obtained from airborne laser scanning. The results based on spatial analyses have shown that the land cover layer is very accurate in urban areas, while it is less reliable in agricultural areas. The results of the classification are presented in an error matrix, showing an overall accuracy of 65 %. The second comparison gave us an insight of the height accuracy of structures in Ljubljana and showed that the tallest structure in Ljubljana is the chimney of the Ljubljana Power Plant, with a height of 150 m. This structure is not captured in the Urban Atlas building height layer, as the horizontal accuracy of the layer is 5 m, while the upper diameter of the chimney is 4.3 m. For a more detailed analysis, we examined quadrant 461_101, which covers the old city center. The results show that the layer correctly detects most of the buildings, and the difference between the Urban Atlas building height data and the laser scanning building height data for the tallest building in the quadrant is only 1 m. With this research, we confirmed that the Copernicus program layers are useful and reliable for further spatial research and processing, especially in urban areas, where they achieve high accuracy.
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