What is defined as a location?

Answer 1

A location is the position which is usually measure in terms of a fixed point of reference, which is called the origin. In n-dimensional space the location may be defined in terms of distances from origin along orthogonal axes (n axes), or in terms of distance and direction (one measure of distance and n-1 angles).

Location on the surface of a sphere, for example the earth, can be defined by only two angles (the latitude and longitude) and no distance because the distance is implied (radius of the earth).