Okon, E. et al. 2025. Investigating the Altitude-Dependent Accuracy of Depths Derived by Colour Ratio from Unmanned Aerial System (UAS)-Multispectral Imageries. Journal of Spatial Information Sciences. 2, 2 (Jun. 2025), 50–77. DOI:https://doi.org/10.5281/zenodo.15668026.