Google Charts Map Customizing markers

Google Charts Map Customizing markers

<html>
   <head>
      <title>Google Charts Tutorial</title>
      <script type = "text/javascript" src = "https://www.gstatic.com/charts/loader.js"></script>
      <script type = "text/javascript" src = "https://www.google.com/jsapi"></script>
      <script type = "text/javascript">
         google.charts.load('current', {packages: ['map']});     
      </script>
   </head>

   <body>
      <div id = "container" style = "width: 550px; height: 400px; margin: 0 auto">
      </div>
      <script language = "JavaScript">
         function drawChart() {
            // Define the chart to be drawn.
            var data = google.visualization.arrayToDataTable([
               ['Lat', 'Long', 'Name'],
               [37.4232, -122.0853, 'Work'],
               [37.4289, -122.1697, 'University'],
               [37.6153, -122.3900, 'Airport'],
               [37.4422, -122.1731, 'Shopping']
            ]);

            // Set chart options
            var options = {
               showTip: true,
               icons: {
                  default: {
                     normal: 'http://icons.iconarchive.com/icons/icons-land/vista-map-markers/48/Map-Marker-Ball-Azure-icon.png',
                     selected: 'http://icons.iconarchive.com/icons/icons-land/vista-map-markers/48/Map-Marker-Ball-Right-Azure-icon.png'
                  }
               }      
            };          

            // Instantiate and draw the chart.
            var chart = new google.visualization.Map(document.getElementById('container'));
            chart.draw(data, options);
         }
         google.charts.setOnLoadCallback(drawChart);
      </script>
   </body>
</html>