Definition of Imagery Imagery means to use figurative language to represent objects, actions, and ideas in such a way that it appeals to our physical senses. Usually it is thought that imagery makes use of particular words that create visual representation of ideas in our minds.
A velocity vector is an arrow that shows direction and speed of motion of a GPS site. The velocity vector for each site shown in Figure 2 is calculated from data like those shown in Figure 1. A vector is a mathematical construct that has a magnitude and a direction.
We can think of the vector as an arrow pointing in the direction of motion with a length proportional to the speed. We refer to this vector as the velocity. If we want a simpler description of the motion, we use the magnitude of the vector, which is just the length of the arrow, and we call it speed.