{HEAD ~ The respective loci} of {TAIL ~ the matched map objects} are processed to determine the requested map location 
of
{ HEAD ~ The respective loci } of { TAIL ~ the matched map objects } are processed to determine the requested map location
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH