Wyrysowanie koła w Gmap - Kody, triki, sztuczki

Rysowanie koła. Należy odpowiednio wypełnić właściwości obiektu google.maps.CircleOptions

<html>
<head>
  <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
  <meta charset="UTF-8">
  <title>Koło</title>
  <script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
  <script type="text/javascript">
    var map; var position = new google.maps.LatLng(52.217283, 20.972372);
    function initialize() {
      var mapOptions = {
        center: position,
        zoom: 8,
        mapTypeId: google.maps.MapTypeId.ROADMAP
      };
      map = new google.maps.Map(document.getElementById('map_canvas'), mapOptions);
      var circleOptions =
      {
        strokeColor: '#FF0000',
        strokeOpacity: 0.8,
        strokeWeight: 2,
        fillColor: '#FF0000',
        fillOpacity: 0.35,
        map: map,
        center: position,
        radius: 25000
      };
      var cityCircle = new google.maps.Circle(circleOptions);
    }
    google.maps.event.addDomListener(window, 'load', initialize);
  </script>
</head>
<body>
  <div id="map_canvas" style="width:800px; height:500px"></div>
</body>
</html>