You can define a Drone as ” an aircraft with the ability to fly , semi or fully autonomous , thanks to a computer and sensors on board.
Drones have been associated largely with military use. However, each day more affordable, they are ideal for a wide range of applied research. They are now common tool for building techniques , photogrammetry , transport, agriculture , safety , rescue, environmental research and many other applications . In different circumstances , the only way to see what happened on the ground are satellite images and remote sensing analysis , but conventional platforms for the acquisition of these data, such as pilotless aircraft and satellites are expensive. The use of aerial robots can be beneficial to complete tasks with time requirements or precise position they are complex , or they have to be carried out in harsh environments.