Template:Tz/coordinates

Info about tz database data storage in Wikipedia at Template:Tz/doc.

zone.tab
 * 1) 2.  Latitude and longitude of the zone's principal location
 * 2)     in ISO 6709 sign-degrees-minutes-seconds format,
 * 3)     either +-DDMM+-DDDMM or +-DDMMSS+-DDDMMSS,
 * 4)     first latitude (+ is north), then longitude (+ is east).