title: MKMapView zoom to highest zoom level
body: <p>Ive seen a lot of examples for centering an annotation and setting the zoom.  This all works, but nothing I try sets the zoom of the map to the closest you can possibly be.  No matter what method I use, you can still pinch zoom closer after the code runs, and I need the zoom to be as close as possible after the zoom finishes.</p>
  
  <p>Ive tried two methods, one works partially better than the other.</p>
  
  <p>The first, the one that zooms a tad closer is this method</p>
  
  <pre><code>// get the annotation's point and center the map to fit it
  MKMapPoint annotationPoint = MKMapPointForCoordinate(annotation.coordinate);
  MKMapRect pointRect = MKMapRectMake(annotationPoint.x, annotationPoint.y, 0.1, 0.1);
  [self setVisibleMapRect:pointRect animated:animated];
  </code></pre>
  
  <p>adjusting the .01 values to smaller numbers has an effect to a point, but I can't reach the highest zoom.</p>
  
  <p>The other method I have tried is this...</p>
  
  <pre><code>MKCoordinateRegion adjustedRegion = [self regionThatFits:MKCoordinateRegionMakeWithDistance(annotation.coordinate, .005, .005)];
  adjustedRegion.span.longitudeDelta  = 0.001;
  adjustedRegion.span.latitudeDelta  = 0.001;
  [self setRegion:adjustedRegion animated:YES];
  </code></pre>
  
  <p>Ive attempted values all the way up to .000000001 and there is no visible change in either method to get any closer at a certain point.  How can I set the maximum zoom from code?</p>