Re: Is there timezone data for any Indian cities such as Mumbai, Dehli, &c.?

On Fri, Aug 17, 2012 at 11:10 PM, Jim Monty <[email protected]> wrote:

Thanks again Jim,

Ted wrote:
> > Jim wrote:
> > > For a convenient list of all the time zones in the tz database, see
> > > http://en.wikipedia.org/wiki/List_of_tz_database_time_zones.
> >
> > Given that it seems the entries are generaly 'continent/city', is there
> > something in DateTime that will take any city or state and lookup the
> entry
> > for the closest city? Or is that something I'll have to write, based on
> > lat/lon data for cities (I am pretty sure I saw a database with lat/lon
> > data for cities somewhere, but ... if it already exists, I don't have to
> > write it)?
>
> There aren't any geocoding modules in the Perl DateTime suite (why would
> there be?), but there *are* plenty of geocoding Perl CPAN modules. Check
> out
> the Geo::Coder::* modules, for example.
>
> The most obvious reason is that there are a great many more cities in this
world than are named in the basic timezone.  Such a service is essential if
you want to support determination of the proper timezone from, e.g., a
mailing address.  Given that is seems so obvious to me, it is a wonder that
someone hasn't alreay written a package that bridges the gap between
geo-coding and the timezone database; but maybe one wouldn't be too hard
built on something like the geonames database.


> If you want to roll your own simple time zone aliases, check out
> DateTime::TimeZone::Alias:
>
>
>     http://search.cpan.org/dist/DateTime-TimeZone-Alias/
>
> The simplest DIY solution is a lookup table using a hash.
>
> If you want to do something more elaborate, there are oodles of
> geocoding resources for programmers on the web:
>
>
>     http://en.wikipedia.org/wiki/Geocoding
>     http://askgeo.com/
>     http://askgeo.com/database/TimeZone
>
>     http://www.geonames.org/export/web-services.html#timezone
>     http://stackoverflow.com/questions/262264/
>     http://stackoverflow.com/questions/237023/
>     http://stackoverflow.com/questions/55901/
>     http://stackoverflow.com/questions/41504/
>
>
> Jim Monty
>
>
I have begun to study the geonames database, but I hadn't happened up their
web services.

Thanks again

Ted