# Position (geometry)

In geometry, a **position** or **position vector**, also known as **location vector** or **radius vector**, is a Euclidean vector that represents the position of a point *P* in space in relation to an arbitrary reference origin *O*. Usually denoted **x**, **r**, or **s**, it corresponds to the straight line segment from *O* to *P*.
In other words, it is the displacement or translation that maps the origin to *P*:[1]

The term **position vector** is used mostly in the fields of differential geometry, mechanics and occasionally vector calculus.

Frequently this is used in two-dimensional or three-dimensional space, but can be easily generalized to Euclidean spaces and affine spaces of any dimension.[2]