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A 'reference point' is a tool used for the purpose of striking systematic comparisons of states relative to a controlled state.
Through its use, a reference point offers all observers a common frame through which to judge change and from which to establish its significance.
Reference points are also employed when giving directions. A reference point is the location from which the directions start, or the position from which other objects' distances are measured. For example, if Building B was to the left of Building A, then one would use Building A as a reference point, and say go to the left of Building A in order to reach Building B. Intermediate reference points – commonly known as "waypoints" or "control points", are positions along a path of travel used to verify how accurately the path has been navigated.

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See also

See also

★ Frame of reference

★ Geometry

★ Navigation

★ Orienteering