Prosečne GPS koordinate za poštanski broj 77900: 18.528, -88.372

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Spisak gradova:
>> Calderitas 77900, Quintana Roo, Othon P Blanco, GPS koordinate: 18.55,-88.25
>> Lopez Subteniente 77900, Quintana Roo, Othon P Blanco, GPS koordinate: 18.4833,-88.4
>> Xul-ha 77900, Quintana Roo, Othon P Blanco, GPS koordinate: 18.55,-88.4667