Coordinates are numeric combinations that are used to describe an object or element position within space. Coordinates can be used to map all sorts of different spatial descriptions. You are likely the most familiar with 2D and 3D space described with X, Y, and Z coordinates. When addressing space in this manner, you are using Cartesian coordinates. Cartesian coordinates can describe 2D and 3D space. A variation of the classic Cartesian coordinates are UV coordinates, described with the U and V labels instead of X and Y. Other spatial mapping methods that do see use from time to time include polar coordinates, spherical coordinates, and coordinates that can be used to describe other dimensions.