title: Animate google maps polyline
body: <p>I'd like to draw an animated (geodesic) polyline in google maps, a bit like this: <a href="http://planefinder.net/route/SFO/">http://planefinder.net/route/SFO/</a></p>
  
  <p>I found many tutorials on how to animate a symbol along a polyline, but nothing about animating the polyline itself from the source to the destination.</p>
  
  <p>Any hints ? Where should I start ? </p>
  
  <p>Any help is really appreciated. </p>