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Solution for: #47: finding a time zone give lat/lon coordinates

use the flickr API

1

- 148c663fd665c53518538e093ce3c2ab_small kueda on May 22, 2009, 09:06 PM UTC

The Flickr API is amazing. using the places.findByLatLon method, you can not only reverse geocode your coordinates, but each place response comes with a a TZ time zone identifier! TZ is the database used by the Rails time zone stuff, so it's perfect for use in rails. Here's a trivial example using the excellent flickraw gem:

   1  
   2  o = Observation.first
   3  places = flickr.places.findByLatLon(:lat => o.latitude, :lon => o.longitude)
   4  o.time_zone = ActiveSupport::TimeZone::MAPPING.invert[places.first.timezone]


Also, it's Flickr, so pretty robust and open.
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