W. T. Adi, A. aghastya, N. . Ahda Imron, N. . Fitria Apriliani, I. . Anwer, and P. . Puangprakhon, “Comparison of UAV Drone and Online Terrain Model for Railway Route Planning”, jrtt, vol. 1, no. 1, pp. 20–27, May 2022.