geo chart marker mode

A Geochart is a map of a country, a continent, or a region. The marker mode marks designated regions using bubbles that are scaled according to a value that you specify.

function drawMarkersMap() {
  var data = google.visualization.arrayToDataTable([
    [\'City\',   \'Population\', \'Area\'],
    [\'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],
    [\'Fiumicino\', 67370,      213.44],
    [\'Anzio\',     52192,      43.43],
    [\'Ciampino\',  38262,      11]
  ]);

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

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