What differences are there between Core Location on the iPod Touch and iPhone?

Question

I guess the GPS chip is only there on the iPhone. But for some reason, my iPod Touch seems to know my position anyways even without GPS chip. So what does that mean for Core Location? What do I have to consider when using Core Location both on the iPhone and iPod Touch? What are the differences?

Answer 1

I believe the API is the same. All that differs is the accuracy of the location that gets returned to you via the API.

the iPhone uses the GPS to get a pretty accurate lock on your location, whereas the iPod Touch uses IP-Location or Wifi-Triangulation technology, which is less accurate than the iPhone's GPS.

Answer 2

The iPod touch uses this method for Core Location information

http://en.wikipedia.org/wiki/Skyhook_Wireless

-t