title: MKPolylineRenderer produces jagged, unequal paths
body: <p>I am using the iOS 7 MapKit APIs to produce 3D camera movements on a map that displays an MKDirectionsRequest-produced path. The path is rendered by MKOverlayRenderer like so:</p>
  
  <pre><code>-(void)showRoute:(MKDirectionsResponse *)response
  {
  for (MKRoute *route in response.routes)
   {
      [self.map
       addOverlay:route.polyline level:MKOverlayLevelAboveRoads];
   }
  }
  
  - (MKOverlayRenderer *)mapView:(MKMapView *)mapView rendererForOverlay:(id &lt; MKOverlay &gt;)overlay
  {
   MKPolylineRenderer *renderer =
   [[MKPolylineRenderer alloc] initWithOverlay:overlay];
  UIColor *mapOverlayColor = [UIColor colorWithRed:((float)22 / 255.0f) green:((float)126 / 255.0f) blue:((float)251 / 255.0f) alpha:0.8];
   renderer.strokeColor = mapOverlayColor;
   renderer.lineWidth = 13.0;
   return renderer;
  }
  </code></pre>
  
  <p>It's working well except for one issue. When I zoom or pan around the path with MKMapCameras (and without them, if I simply do so as the user), the path is jagged as shown in this screenshot:</p>
  
  <p><img src="https://i.stack.imgur.com/haLLc.jpg" alt="screen shot"></p>
  
  <p>I tested to see if switching to MKOverlayLevelAboveLabels makes a difference but sadly the outcome was the same.</p>
  
  <p>Does anyone have suggestions as to how to improve the rendering? Does switching to a geodesic path make a difference and if so, how would I implement this here?</p>