fbpa.js

google.load('visualization', '1', {'packages': ['geochart']});
     google.setOnLoadCallback(drawMarkersMap);

      function drawMarkersMap() {
      var data = new google.visualization.DataTable();
      data.addColumn('string', 'City');
      data.addColumn('number', 'Population');
      data.addColumn('number', 'Area');
      data.addRows([
        ['Rome', 2761477, 1285.31],
        ['Milan', 1324110, 181.76],
        ['Naples', 959574, 117.27],
        ['Turin', 907563, 130.17],
        ['Palermo', 655875, 158.9],
        ['Genoa', 607906, 243.60],
        ['Bologna', 380181, 140.7],
        ['Florence', 371282, 102.41]
      ]);

      var options = {
        region: 'IT',
        displayMode: 'markers',
        colorAxis: {colors: ['green', 'blue']}
      };

      var chart = new google.visualization.GeoChart(document.getElementById('chart_div'));
      chart.draw(data, options);
    };