title: distinguishing between indoor and outdoor by the gps provider
body: <p>I would like to distinguish when my user is indoor and when he is outdoor using the gps provider.
  That would be done by the getAccuracy() method of coruse.
  So which value returned from the method would be the limit?</p>
  
  <p><strong>from which value I will be sure that my user is indoor</strong>?</p>