Gjennomsnittlig GPS-koordinater for postnummer 289-31: 50.211, 15.067
Notering byer:
>>
Bobnice 289-31,
Nymburk, GPS-koordinater: 50.2167,15.05
>>
Chleby 289-31,
Nymburk, GPS-koordinater: 50.2167,15.0833
>>
Kovansko 289-31,
Nymburk, GPS-koordinater: 50.2,15.0667