title: Drawing elements on an MKMapView of a specified size in meters
body: <p>I'm attempting to draw a circle around a point on a mapview, which I have successfully done, but not quite the way I wanted to.  The CG methods are always going to be drawing relative to the screen size, and basically I want to draw things in meters, not pixels.</p>
  
  <p>Anyone have experience doing this?</p>