A system and method for geo-referencing a main measuring instrument which operates in an Instrument Coordinate System. The method includes the steps of deploying the main measuring instrument on a deployment surface. An auxiliary measuring instrument is used to measure the position of a plurality of external reference points in a Master Coordinate System as well as a plurality of local reference points on the main measuring instrument in the Master Coordinate System. An inclinometer associated with the main measuring instrument, obtains an orientation reading for the deployed main measuring instrument. A processor then uses the orientation reading and the measured positions of the external reference points and the local reference points on the main measuring instrument, to geo-reference the main measuring instrument so that measurements made therewith are automatically output in the Master Coordinate System.
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