This invention relates to surveying and to {HEAD ~ the use} of {TAIL ~ Satellite Positioning System information} to improve the accuracy and productivity of such surveying 
This invention relates to surveying and to { HEAD ~ the use } of { TAIL ~ Satellite Positioning System information } to improve the accuracy and productivity of such surveying
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH