Template:Time zone/coord
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Info about tz database data storage in Wikipedia can be found at {{Time zone/doc#tz database}}.
This template stores data that might be usable by {{coord}}. (It's unclear what this means - the coord template needs separate params (i.e. '|'-separated). Not sure why the original author chose this '/'-separated format. TBD). Used by {{Infobox IANA time zone}}.
Template:Time zone/coordinates contains the coordinates in the original format.