I’ve seen a few comments questioning why the G1 has a compass built in to it. I guess its main use is pretty obvious and is demonstrated nicely with the streetview application (below).

Coming from the UK, where most of the time you can’t see where the sun is during the day, I’d find it very useful to know which way I’m facing. A number of times when trying to find an address on Google maps I’ve arrived at a tube station, stepped out on the street and then waited for a few minutes for GPS to kick in on my device. I then know where I am but not necessarily which way I am facing. So my next choice is to either look at the intersecting street names, identify a landmark or just walk for a bit and see which way the dot moves. A compass would obviously do away with that.

We don’t have Streetview in the UK yet but I’ve seen their cars in Oxford and in Slough (why Slough!) so it must be coming soon. However, maybe for day to day use ‘Enkin’ or a similar app may be more use. Enkin makes use of a 2D or 3D map or even ‘augmented reality’ to overlay labels (or anything really) on top what your device sees through the camera. To do this it seems they need a compass as well as GPS and an accelerometer (see pdf here ).

I’d guess you’d also need a reasonable accurate list of locations – something which I can’t honestly say that Google Maps has having got lost looking for a hotel in Dublin last week.

(btw- Enkin haven’t updated their blog for a while. I’m hoping that’s because they are busy coding and not because they’ve taken the developer challenge money and spent it all on crack… they seem like sensible chaps so I’m sure they haven’t.)