title: google geochart marker size and color
body: <p>This is a two part question.</p>
  
  <p>First, is there a way to change the size of the markers on google's Geochart when the points being plotted are only cities and don't have a population or size tied to them? I'm just listing cities with no value attached to it and all of Google's examples have some sort of population attached to it.</p>
  
  <p>For example, Google uses this bit of code which the size of the marker is reflected by the population.</p>
  
  <pre><code>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]
    ]);
  </code></pre>
  
  <p>Is there any way to change the marker size without having it set by some sort of area or population?</p>
  
  <p>Secondly, since I don't have a number for the marker size (only city name), how can I change the color of the markers? From what I understand, colorAxis is based off of the number tied to the city being plotted.</p>
  
  <pre><code>colorAxis: {colors: ['green', 'blue']}
  </code></pre>
  
  <p>Here's a link to the API's documentation <a href="https://developers.google.com/chart/interactive/docs/gallery/geochart" rel="nofollow">https://developers.google.com/chart/interactive/docs/gallery/geochart</a></p>