Hodograph

It appears to have been used by James Bradley, but its practical development is mainly from Sir William Rowan Hamilton, who published an account of it in the Proceedings of the Royal Irish Academy in 1846.

[2] It is used in physics, astronomy, solid and fluid mechanics to plot deformation of material, motion of planets or any other data that involves the velocities of different parts of a body.

With the hodograph and thermodynamic diagrams like the tephigram, meteorologists can calculate: It is a method of presenting the velocity field of a point in planar motion.

[4] The study of the hodograph, as a method of investigating the motion of a body, was introduced by Sir W. R. Hamilton.

The hodograph may be defined as the path traced out by the extremity of a vector which continually represents, in direction and magnitude, the velocity of a moving body.