[tz] Reason for removal of several TZ abbreviations
guy at alum.mit.edu
Wed Dec 6 17:58:04 UTC 2017
On Dec 6, 2017, at 8:50 AM, Brian Inglis <Brian.Inglis at systematicsw.ab.ca> wrote:
> On 2017-12-05 14:29, Guy Harris wrote:
>> So, for doing a script to do the equivalent of what macOS and iOS do, you'd
>> want more like "get your external IP address, geolocate it, and hand it to a
>> program with a set of shapefiles for tzdb regions". See, for example
>> (to which
>> now refers people).
> More likely query the underlying geodatabase for the time zone region, often
> indexed by the minimum bounding rectangle [min x, min y[ - [max x, max y]
> surrounding the possibly non-convex hull, then resolve muiltiple hits by
> checking the interior convex polygons contain the coordinate, or equivalent tests.
That's what I meant by "hand it to a program with a set of shapefiles for tzdb regions".
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