title: Google Static Maps Move maps with a finger
body: <p>I’m downloading maps using <a href="http://code.google.com/apis/maps/documentation/staticmaps/" rel="nofollow noreferrer">Static Maps V2 API</a> then display map on my mobile device, now I would like to move map using my finger and a touch screen on my device. </p>
  
  <p>How can I calculate a new center for moved map, knowing previous map center, zoom level and how many pixels map has been moved?</p>