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Omit if unknown (computed at 12:00 with a TIME_UNKNOWN warning)."},"latitude":{"type":"number","minimum":-90,"maximum":90,"description":"Decimal degrees, north positive."},"longitude":{"type":"number","minimum":-180,"maximum":180,"description":"Decimal degrees, east positive."},"timezone":{"type":"string","description":"IANA zone, e.g. 'Asia/Kolkata'. 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