Enkin augmented reality app

I just spotted Enkin.

As you can see from the video below, it’s an Android application that combines Google Map data with GPS-and-compass positioning info, plus video footage from the phone’s camera.

It’s all very very clever. Three things to note about the cleverness:

1. In map mode, they use camera motion to drive the interface (i.e. no need for an accelerometer)
2. In live mode, they use accelerometer (and compass?) data to keep the camera view steady

3.In live mode, they use compass and GPS data to keep the ‘augmented’ data in the right place

P.S. Also see this bonus interview with the creators.
P.P.S. This is similar to the (defunct?) MARA project by Nokia research. More about that here and here.