TY JOUR TI Identification of a number of hazardous processes threatening railway infrastructure on the Baikal-Amur Mainline based on data from unmanned aerial systems KW unmanned aerial systems KW railway KW permafrost KW digital elevation model KW orthomosaic JO Izvestia Vuzov. Geodesy and Aerophotosurveying AU Shcheglov, M.S. AU Pavlovskiy, A.A. AU Karelov, A.I. AU Mil'shteyn, S.I. PY 2025 IS 69 PB MIIGAiK