title: How to color countries using google maps?
body: <p>I need to color different countries in the world based on a Range (eg: population)</p>
  
  <pre><code> Red  :   &gt; 100 million
   Green:   50 - 99 million
   Ash  :   &lt; 50 million
  </code></pre>
  
  <p>How can this be done.
  My development environment is Rails3. Please help</p>
  
  <p>I will attach a sample image how the map should look</p>
  
  <p><img src="https://i.stack.imgur.com/U72jh.png" alt="enter image description here"></p>