How Does the Wilderness Downtown Google Map Work?

I was just watching the Wilderness Downtown video - http://www.thewildernessdowntown.com/ - and I couldn't quite work out how the folks behind开发者_开发技巧 it did the Google Map which scrolls along and rotates, all on an HTML5 canvas.

I've looked through the Google Maps Javascript API - http://code.google.com/apis/maps/documentation/javascript/ - and nowhere in it can I see any pointers on how to embed a Google Map into a canvas tag (which can then be transformed as in the video).

Any help on this would be very appreciated,

DLiKS

Ricardo Cabello, Mr.doob in the credits, has a blog post titled Making of The Wilderness Downtown.