Abstract: A technique for plotting the provenience of an archaeological artifact with respect to a fixed reference point is disclosed herein. This technique utilizes an apparatus including a base assembly positionable at the fixed reference point, means movable to the location of the artifact from a given starting point, and means connected with the base assembly and the movable means and responsive to movement of the latter to the artifact location from its given starting point for indicating the position of the artifact location within a particular coordinate system, specifically a spherical coordinate system including coordinates .phi., .theta. and .rho..