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Comparative analysis of multispectral bands acquired by UAV for the construction of a digital bathymetric model in the shallow waters

Łącka Małgorzata, Łubczonek Jacek

Zeszyty Naukowe Politechniki Morskiej w Szczecinie

2025

nr 83 (155)

98--107

This article presents a comparative analysis of the creation of digital bathymetric models using multispectral bands. The case analyzed involves images acquired from low altitude using an unmanned aerial vehicle in an area of shallow inland waters. The use of an underwater photogrammetric network enables georeferencing of the datasets at a level no worse than 0.013 m (mean RMSE). The green and red bands make it possible to generate a dense point cloud in the full bottom area and create DBMs, the accuracy of which is examined on the basis of 22 bottom check points and the obtained accuracies for the RMS error are no worse than 0.24 m. The results of this study indicate that the green and red bands can be used for bathymetry acquisition in shallow and very shallow waters, which can be applied to work that requires accurate bathymetry reconstruction in these types of water bodies.