title: How to create polygon which shape are area that input by user using google map v3?
body: <p>I would like to create polygon which shape are area that input by user. For example, user input Chicago. Then map will show polygon like below image :</p>
  
  <p><img src="https://i.stack.imgur.com/uGXZt.png" alt="http://i.stack.imgur.com/bArsU.png"></p>
  
  <p>I cant show image because i dont have enough reputation</p>
  
  <p>Is anybody know how to do it? I don't know to get latitude and longitude of edge the area that needed to draw polygon?</p>
  
  <p>Thanks</p>