Gjennomsnittlig GPS-koordinater for postnummer 28988: 31.083, -107.1
Notering byer:
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Campestre 28988,
Colima, Villa de Alvarez, Villa de Alvarez, GPS-koordinater: 31.7167,-106.3833
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El Llano 28988,
Colima, Villa de Alvarez, Villa de Alvarez, GPS-koordinater: 30.45,-107.8167