Gjennomsnittlig GPS-koordinater for postnummer 289-21: 50.189, 14.889

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Notering byer:
>> Doubrava 289-21, Nymburk, GPS-koordinater: 50.1667,14.9667
>> Hronětice 289-21, Nymburk, GPS-koordinater: 50.2,14.95
>> Kostomlátky 289-21, Nymburk, GPS-koordinater: 50.1667,14.6
>> Kostomlaty nad Labem 289-21, Nymburk, GPS-koordinater: 50.1889,14.8889
>> Lány 289-21, Nymburk, GPS-koordinater: 50.2,14.95
>> Rozkoš 289-21, Nymburk, GPS-koordinater: 50.1833,14.9333
>> Vápensko 289-21, Nymburk, GPS-koordinater: 50.2167,14.9333