ขอสอบถามเกี่ยวกับการดึงค่า latitude longitude ทั้งหมดของแต่ละ polygon ค่ะ

var map; 
  var markersArray = [];  
  	
function initialize() {   
  var haightAshbury = new google.maps.LatLng(38.891033,-104.941406);   
  var mapOptions = {     
  	zoom: 4,     
	center: haightAshbury,     
	mapTypeId: google.maps.MapTypeId.HYBRID   
  };   
  map =  new google.maps.Map(document.getElementById("map_canvas"), mapOptions);    
		
		
	  	var drawingManager = new google.maps.drawing.DrawingManager({   
	drawingMode: google.maps.drawing.OverlayType.POLYGON,   
	drawingControl: true,   
	drawingControlOptions: {    
	 position: google.maps.ControlPosition.TOP_CENTER,     
	 drawingModes: [              
	 google.maps.drawing.OverlayType.POLYGON,           
	 ]   
	 }
	 }); 
	 
	 drawingManager.setMap(map);
}