Borowiec, Natalia
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inżynieria lądowa, geodezja i transport
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Item type:Article, Access status: Open Access , An analysis of the spatial and temporal changes on the Jakobshavn Glacier (Greenland) using remote sensing data(Wydawnictwa AGH, 2021) Olszewska, Katarzyna; Borowiec, NataliaThis article presents the problem of climate warming and the effect of melting ice caps. The problem of climate warming is discussed in two stages. In the first stage, the factors affecting global warming are discussed in detail and the effects and risks of ablation extensively described. Analyses were conducted on data available online from NASA and Carbon Dioxide Information Analysis Center. The Greenland area (Jakobshavn Glacier) was selected to visualize glacier calving front changes. The analysis of changes was performed on the selected satellite images covering the summer period (June to September) provided by the Landsat program. Then, the changes in the position of the calving front of the Jakobshavn Glacier were visualized for the period 1985–2020, with a repeatability of every 5 years. Thus, our results addressed the challenges of environmental changes to remote sensing data processing. In addition to the visualization, a surface summary of these changes was presented in the study. The results were discussed in the context of climate change data processed by means of the GIS method. Furthermore, an analysis of the effects of greenhouse gases on glacier surface changes was performed. In summary, the results reveal that satellite imagery is an excellent source of data on which to visualize glacier calving rates, comparing individual layers showing the position of the glacier calving front and calculating the area of calved ice.Item type:Article, Access status: Open Access , An empirical analysis of changes in the Błędów Desert using machine learning methods(Wydawnictwa AGH, 2025) Czernik, Anna; Borowiec, Natalia; Marmol, UrszulaThe aim of the study was to determine changes in the land cover of the Błędów Desert, which is a habitat for rare flora and fauna species protected under the Natura 2000 program. Invasive plants, which pose a threat to protected species, are present in this area. Additionally, human activities can have negative impacts on the desert ecosystem. Therefore, the land manager is obligated to carry out actions aimed at maintaining the appropriate size and character of the desert. The analysis was conducted using satellite imagery from the Sentinel-2 mission, which provides images with high temporal and spatial resolution. The study covered the years 2015–2022 and took into account seasonal variability due to the presence of green vegetation. Change detection methods based on data integration, including photointerpretation and machine learning classification, were used for land cover analysis. Five representative land cover classes were defined, enabling a quantitative presentation of changes in the Błędów Desert and a qualitative assessment of the classification performed. The results of the study indicate variability in land cover depending on the season, with an increasing number of protected plant species, including grasslands. Simultaneously, a slight increase in the desert area was noted, manifesting as an increase in sand in forested areas. The results obtained demonstrate the effective implementation of the Natura 2000 program objectives.Item type:Article, Access status: Open Access , Korekcja geometryczna wysokorozdzielczych obrazów satelitarnych(Wydawnictwa AGH, 2006) Borowiec, NataliaThis paper is a comparative study of the geometrical correction of high-resolution satellite imagery. In the last few years, the dynamic development system of satellites has made the registration of high resolution imagery below 1m. possible. However, these low accuracy images require geometrical correction. Geometrical correction is basically a mathematical relationship between object point coordinates and image pixel coordinates. Initially, corrections used to be made using 2D polynomial models. These models were defected as they required a large number of ground control points, sensitivity onto irregular distribution of these points and numerical instability. In addition, in last time appear solution problems of geometrical correction with utilization of rational function model. This article introduces the theoretical basis of the rational function model. It gives a detailed description of methods used to specify polynomial coefficients as well as the practical results obtained when correcting satellite images using the two methods of correction - the direct and indirect method. Analysis of empirical results indicate that the geometrical correction method of the rational function model is much more accurate.Item type:Article, Access status: Open Access , Ortofotomapa w terenach miejskich(Wydawnictwa AGH, 2006) Borowiec, Natalia; Zabrzeska-Gąsiorek, BarbaraOrthophotomap is a very beneficial layer in a GIS - it provides accurate base map with advantages of the photograph. In urban areas the conventional orthorectification based on a Digital Terrain Model has encountered many difficulties, because do not consider the surface of buildings, bridges, etc. Such objects remain in perspective view and have radial distortion on the resulting orthophotomaps. If buildings and other elements higher then ground describes a Digital Surface Model, the displacement can also be corrected, and results are called »true orthophotomap« - imagery without building lean. This paper presents the problems of the generation digital »true orthophotomap« in urban areas with acquisition of laser scanner data.