Belenok V, Velikodsky Y, Nikolaienko O, Rul N, Kryachok S, Malik T. Comparative analysis for methods of building digital elevation models from topographic maps using geoinformation technologies. GAC [Internet]. 2021Dec.13 [cited 2024Nov.8];47(4):191-9. Available from: https://gc.vgtu.lt/index.php/GAC/article/view/13208