Hi Raymond, thanks for the reply!

   1. To be honest I don't know... Never thought of that. What I do is I 
   include the API via javascript and then just query the API through the 
   google.maps namespace. Dunno about any quotas, afaik I download the files 
   to the client side and then the JS files modify the map element on the 
   page, so all client-side, right? I'm not using GWT or AppEngine myself. 
   There it might be different. But normal html pages with Maps API included 
   have a quota too?
   2. As before, I don't know exactly. Yes the animation simply changes the 
   position of the marker a var delta amount of degrees, depending on the 
   progress, duration and distance that needs to be covered in that duration 
   of course. If you want to cover a lot of ground in say a second, the steps 
   will be relatively large, limiting the setPosition() calls. The more fluent 
   it should go, the more steps, the more calls.
   3. The class that I wrote now simply moves a marker along a linear path 
   with several animation effects. I wouldn't know how to do it along a 
   returned google directions route, have never looked into that. But if that 
   contains an array with points or Polyline with paths, you can technically 
   animate from path to path. That'll be a lot of animations then, so maybe 
   not the most efficient way to do it and might bring some performance 
   issues. But worth a try...

Hope this helps!

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