A survey system and {HEAD ~ method} for determining {TAIL ~ the best source} of position data for a particular application 
for determining
A survey system and { HEAD ~ method } for determining { TAIL ~ the best source } of position data for a particular application
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH