title: Best way to request tiles from client?
body: <p>I'm trying to implement method of storing markers in database where markers has lat/lon and </p>
  
  <p>also id of tile that contain this marker. You can see what i'm talking about here:</p>
  
  <p><a href="http://msdn.microsoft.com/en-us/library/bb259689.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/bb259689.aspx</a></p>
  
  <p>My question is what is the best way to make requests to the server depending on what tiles are</p>
  
  <p>currently in viewport of user?</p>
  
  <p>I'm not really good in js &amp; google maps. But maybe someone already tried to solve this </p>
  
  <p>problem. All i need is a sample of js script that will determine tiles in viewport of user </p>
  
  <p>and request only tiles that wasn't requested yet. </p>