Google maps API рисование Эллипса

var citymap = {};
citymap['chicago'] = {
  center: new google.maps.LatLng(41.878113, -87.629798),
  population: 2714856
};
 
var cityCircle;
 
function initialize() {
  // Create the map.
  var mapOptions = {
    zoom: 4,
    center: new google.maps.LatLng(37.09024, -95.712891),
    mapTypeId: google.maps.MapTypeId.TERRAIN
  };
 
  var map = new google.maps.Map(document.getElementById('map-canvas'),
      mapOptions);
 
  // Construct the circle for each value in citymap.
  // Note: We scale the area of the circle based on the population.
  for (var city in citymap) {
    var populationOptions = {
      strokeColor: '#FF0000',
      strokeOpacity: 0.8,
      strokeWeight: 2,
      fillColor: '#FF0000',
      fillOpacity: 0.35,
      map: map,
      center: citymap[city].center,
      radius: Math.sqrt(citymap[city].population) * 100
    };
    // Add the circle for this city to the map.
    cityCircle = new google.maps.Circle(populationOptions);
  }
}
 
google.maps.event.addDomListener(window, 'load', initialize);