Railways Traditional methods of manual ground surveys are slow, long, dangerous and interfere with train schedules, causing delays and unpleasant travelers, and are also costly in the long run. Another geo data collection technology that does not interfere with rail operations is aerial surveillance using UAVs How drones can be used? The applications of drones in railways include preparing contour maps of the area where new rail lines are proposed, 3D models of stations for visualization, and 3D models of the terrain to draw accurate plans. GIS mapped data can be used to calculate the length of track laid and create 3D models to help project managers map potential risks to construction. Drones can also be used for periodic assessment of assets, inspect hard-to-reach areas such as bridges and tunnels, monitor electrical works along the length of railway tracks as well as inspect them for corrosion and cracks or fractures. Drones can be used as ﬁrst responders in case of natural calamities by quickly assessing damages in the railway network and providing crucial insights to emergency personnel.