Aerial Photography is one of the most popular part of Remote Sensing. A machine, especially an aircraft or a drone, i.e., Unmanned Aerial Vehicle (UAV) has the cameras attached. Therefore, it can capture photos from the higher surface. Scale of aerial photographs means the ratio of the distance between two points on an aerial photograph and the actual distance between the same two points on the ground. It is an important describing factors in aerial photogrammetry. It is important to know the scale of the photographs for measurement.
