title: Google Maps Region and Countries polygon
body: <p>This must be quite a simple question, but unable to find any answer.</p>
  
  <p>I wish to show regions given a region name, like </p>
  
  <p>if the input is NewYork State, then i wish to show the NewYork state with one colour initially . Then when the user zooms in, show different districts or significant places or regions with other distinct colors and so on. </p>
  
  <p>How can I achieve this?</p>