title: Google Maps iOS SDK: How do I get accurate latitude and longitude coordinates from a camera's visibleRegion?
body: <p>EDIT: This is now a confirmed bug with <a href="https://code.google.com/p/gmaps-api-issues/issues/detail?id=5107" rel="nofollow noreferrer">this</a> SDK</p>
  
  <p>I'm using version 1.1.1.2311 of the Google Maps for iOS SDK, and I'm looking to find the bounding latitude and longitude coordinates for the visible map on screen.</p>
  
  <p>I'm using the following code to tell me what the current projection is:</p>
  
  <pre><code>NSLog(@"\n%@,%@\n%@,%@\n%@,%@\n%@,%@\n",
      [NSNumber numberWithDouble:mapView.projection.visibleRegion.farLeft.latitude],
      [NSNumber numberWithDouble:mapView.projection.visibleRegion.farLeft.longitude],
      [NSNumber numberWithDouble:mapView.projection.visibleRegion.farRight.latitude],
      [NSNumber numberWithDouble:mapView.projection.visibleRegion.farRight.longitude],
      [NSNumber numberWithDouble:mapView.projection.visibleRegion.nearLeft.latitude],
      [NSNumber numberWithDouble:mapView.projection.visibleRegion.nearLeft.longitude],
      [NSNumber numberWithDouble:mapView.projection.visibleRegion.nearRight.latitude],
      [NSNumber numberWithDouble:mapView.projection.visibleRegion.nearRight.longitude]);
  </code></pre>
  
  <p>From reading the headers, it seems that it may not be updated when the camera moves. Fair enough...</p>
  
  <pre><code>/**
   * The GMSProjection currently used by this GMSMapView. This is a snapshot of
   * the current projection, and will not automatically update when the camera
   * moves. The projection may be nil while the render is not running (if the map
   * is not yet part of your UI, or is part of a hidden UIViewController, or you
   * have called stopRendering).
   */
  </code></pre>
  
  <p>But, it appears to update each time the delegate method is called, so I attempted to plot the coordinates to test them...</p>
  
  <p>For the following on my phone:</p>
  
  <p><img src="https://i.stack.imgur.com/sxoFI.png" alt="my app&#39;s current projection"></p>
  
  <p>The output of the NSLog from above gives me the following:</p>
  
  <pre><code>37.34209003645947,-122.0382353290915
  37.34209003645947,-122.010769508779
  37.30332095984257,-122.0382353290915
  37.30332095984257,-122.010769508779
  </code></pre>
  
  <p>When plotting those coordinates using <a href="http://www.darrinward.com/lat-long/" rel="nofollow noreferrer">this</a> I get a projection that seems off:</p>
  
  <p><img src="https://i.stack.imgur.com/R5rMX.png" alt="actual projection"></p>
  
  <p>These coordinates are consistent across app launches which leads me to believe that I'm either consistently doing something wrong, I'm misunderstanding what visibleRegion is, or I've discovered a bug. Anyone care to help me figure out which one it is?</p>