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