title: Convert MKMapRect to CGRect
body: <p>I'm trying to find out the size of an MKMapRect in points (i.e. 320x568 points for iPhone).</p>
  
  <p>Is there something similar to converting co-ordinates to points? i.e.</p>
  
  <pre><code>[self.mapView convertCoordinate:coordinate1 toPointToView:self.view];
  </code></pre>