title: How to display a circle in GMSMapView
body: <p>I need to display a circle (as with MKCircle) on a GMSMapView. This is easy when using a MKMapView and MKCircle, but can't use MKCircle with GMSMapView.
  Any ideas? </p>
  
  <p>Update:<br>
  This are the current(18.03.2013) options:<br>
   1. A ground marker containing a circle image.<br>
   2. A a circle made with several segments (polyline).  </p>
  
  <p><strong>Edit:</strong><br>
   <strong>3. Google added a GMSCircle (23.04.2013)</strong></p>
  
  <pre><code> GMSGroundOverlayOptions *overlayOptions = [GMSGroundOverlayOptions options];
      overlayOptions.icon = [UIImage imageNamed:@"circle"];
      overlayOptions.position = touchMapCoordinate;
      overlayOptions.bearing = 0;
      overlayOptions.zoomLevel = 14.3;
   [mapView addGroundOverlayWithOptions:overlayOptions];
  </code></pre>
  
  <p>For a circle image 40x40 pixels it looks ok. (radius is approximately 100 m)</p>
  
  <p>Small segmented path solution:</p>
  
  <pre><code>    GMSPolylineOptions *circle = [GMSPolylineOptions options];
      CGPoint touchPoint = [mapView.projection pointForCoordinate:touchMapCoordinate];
      GMSMutablePath *path = [GMSMutablePath path];
  
      CGPoint circlePoint;
  
      for (int i = 0; i &lt; 360; i++)
      { 
          circlePoint.x = touchPoint.x + radius * cos(i*M_PI/180);
          circlePoint.y = touchPoint.y + radius * sin(i*M_PI/180);
  
          CLLocationCoordinate2D aux = [mapView.projection coordinateForPoint:circlePoint];
          [path addCoordinate:aux];
      }
  
      circle.path = path;
      circle.width = 1;
  
      [mapView addPolylineWithOptions:circle];
  </code></pre>
  
  <p>EDIT : 08.05.2013</p>
  
  <p><strong>GMSCircle solution:</strong></p>
  
  <pre><code>     CLLocationCoordinate2D circleCenter = CLLocationCoordinate2DMake(latitude, longitude);
       GMSCircle *circ = [GMSCircle circleWithPosition:circleCenter
                                       radius:1000];
  
       circ.fillColor = [UIColor blueColor];
       circ.strokeColor = [UIColor redColor];
       circ.strokeWidth = 5;
       circ.map = mapView;
  </code></pre>