Code.flickr.com: The Code Behind Geofences(code.flickr.com)
code.flickr.com
Code.flickr.com: The Code Behind Geofences
http://code.flickr.com/blog/2011/09/01/the-code-behind-geofences/
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http://code.flickr.com/blog/2011/09/01/the-code-behind-geofences/
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