What is the meaning of Air craft

An aircraft is an electromechanical body built and controlled using special gadgets to be able to move on air with or without a pilot in it

rosevelt. 1973. "slaves everywhere"

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.