Same for me as well. I'm being detected all the way in another prefecture.

I find it strange that depending on the device, that I will be detected in different areas (even within the same service).

For example: Google Maps says I'm at a park about a 10 minute drive from my current location. But if I view the mobile version of it on my iPod, it can find me to the room of the building I am in.

Anything that's not google or apple puts me in Hamanako, which is a 2 hour drive on the expressway.

It's off by ~10 miles, but since there are several million people between me and where it thinks I am, that's not particularly disturbing.

For me, it was wrong by about 50 miles.