lon,lat to timezone

Question

Does anyone know if there is any existing solution for determining a timezone from a point (lon, lat)?

i could hard code the few i need for this project but it'd be better to use a pre-built solution.

thanks.

Answer 1

Use a webservice such as the one provided by geonames.

Example:

http://api.geonames.org/timezone?lat=47.01&lng=10.2&username=demo

Returns:

...
<timezoneId>Europe/Vienna</timezoneId>
...