Prosečne GPS koordinate za poštanski broj 811-09: 40.992, 22.573
Spisak gradova:
>> Πέτρα/Petra 811-09, Βόρειο Αιγαίο/North Aegean, Νομός Λέσβου/Lesbos, GPS koordinate: 40.99214, 22.57290
Spisak gradova:
>> Πέτρα/Petra 811-09, Βόρειο Αιγαίο/North Aegean, Νομός Λέσβου/Lesbos, GPS koordinate: 40.99214, 22.57290