A computer implemented {HEAD ~ method} for determining a requested map location includes providing {TAIL ~ a database} holding a plurality of map objects having respective descriptors and loci 
includes providing
A computer implemented { HEAD ~ method } for determining a requested map location includes providing { TAIL ~ a database } holding a plurality of map objects having respective descriptors and loci
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH