title: Using location based push notifications on iOS
body: <p>I am looking on developing a tourist application for a city, where when the user is near to a "place of interest" he could get a push (local) on his device.</p>
  
  <p>For example, I would add 100 POIs on my app, and a 100 messages for every POI to show when the user is in range, e.g. "You are close to the Cathedral of.."</p>
  
  <p>Is this scenario possible? Is it possible to check the users position e.g. every 10 minutes even when the application is killed, and when in range fire a local push? How much battery would it drain? If the user closes the GPS would it try to use 3G/wifi signal to get the position?</p>
  
  <p>If yes could you guide me the right way on what I should read on the subject maybe some tutorials and articles?</p>