DaWorm wrote:
On Mon, Jul 25, 2011 at 11:53 AM, Mark Morgan Lloyd
<markmll.fpc-pas...@telemetry.co.uk> wrote:
Link below looks directly relevant: it contains polygon data for each
timezone, subject to knowing the current location.
http://efele.net/maps/tz/world/
I've confirmed that files are accessible (i.e. not subscription-only) but
not investigated the format of the content.
Location may be off too. All of the online location reporting tool
lists my work machine as being in TX, even though I'm in TN, since all
our networks are routed back to the home office before hitting the
cloud.
Yes, I noticed several ways of getting timezone info knowing a named
location (I'm reluctant to use the terms "city" or "town" here, since
they mean different things in different countries) and they obviously
depend on the apparent location being relevant.
The files I found were the only source of raw geographical data which
could be used with e.g. a GPS receiver or manual lat/long entry (on or
over land). Since they appear to contain timezones in the form
Europe/London they should be compatible with e.g. Postgres's internal
tables that describe named timezones, although I haven't investigated
whether there's a one-to-one mapping. I assume that the Postgres files
are GPL, so could be extracted for other use.
--
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk
[Opinions above are the author's, not those of his employers or colleagues]
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