[Talk-us] Timezones in USA?

[Bill Ricker]

​
​I see the attraction to including TZ data in the OSM, ​but the timezone
definitions are in flux more than most political boundaries.

Importing a snapshot of such without a committed project to keep it correct
with the latest boundary changes as announced regularly on the
tzdata/zoneinfo list ( moved to tz at iana now ) would make matters worse not
better.

Certainly we would like to support someone providing easy access to current
and preferably  past and future IANA TZ borders as overlays in OSM formats.

Whether core OSM is the right place to store and serve this is one
question;
what team/project commits to maintaining it another;
and how it can be structured to reuse OSM existing political entity border
relations without causing problems.

TZ borders are exterior of a sum-and-difference of other political
entities.  So a meta-relation of relations that need to be processed by
polygon combining algos prior to rendering. (Like computing a county
relation from sum of constituents, with interior sub-unit boundaries erased
by cancellation.)
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