N-tuple formed by numbers, letters, or both that is used to determine the position of a point in the coordinate system in a plane, such as a table or Cartesian graph, or in space, such as a polar coordinate system.
In a Cartesian coordinate system of a plane where the coordinates are formed by pairs of numbers, the first element refers to the horizontal position and the second element refers to the vertical position.
In a coordinate system in a plane like the one used on a geographical map or road map; or a game of chess, checkers, or battleship; the coordinates of a square are composed of a letter and a number. In this case, the first coordinate can represent either the vertical position or the horizontal position, and the other coordinate indicates the other position.
Examples
In this illustration, the Montreal airport is located at E-1:
