I am a big fan of Yahoo weather app. I prefer this app more than the default iOS weather app. One of the core reasons for my attraction to this app is the beautiful location based background pictures.
After some research, I was excited to know that those photographs are from real users, selected from a Flickr group and everyone have a chance to publish their photographs.
The challenge ?
Till this point every thing sounds simple right? Here is a minor challenge : The photograph should have location information for Yahoo to associate it with a particular location, In other words photograph should be geotagged.
At present, photos can be geo tagged in Flickr itself using Organizr.
Here are the complete sets of guidelines: https://www.flickr.com/groups/projectweather/
Good luck to reach millions of smartphones :)