title: Intensity map using GWT
body: <p>Google has a library for GWT gwt-visualization (can be obtained <a href="http://code.google.com/p/gwt-google-apis/wiki/Downloads?tm=2" rel="nofollow noreferrer">HERE</a>). I tried to find an example on how to draw intensity heat (<a href="http://gwt-google-apis.googlecode.com/svn/javadoc/visualization/1.1/com/google/gwt/visualization/client/visualizations/IntensityMap.html" rel="nofollow noreferrer">IntensityMap</a>) map but was not able to find anything.
  What I'm trying to achieve is to create a city map and the intensity circles over the cities. Similar to <a href="https://developers.google.com/chart/interactive/docs/gallery/geochart#markersexample" rel="nofollow noreferrer">example</a> image below.</p>
  
  <p><img src="https://i.stack.imgur.com/wj81f.png" alt="Intensity map"></p>
  
  <p>So, my question is how do I make such a map using GWT using gwt-visualization library.</p>