Photo geotagging without wifi or Internet?

[GUCCIMAN]

Hey all, so before I exchanged my wifi iPad for the 4g, I took some road shots and intersection pictures on the wifi model.

Checked those pics after and it accurately geotagged them!? Can anyone explain this or the tech behind it?

I was connected to wifi at home.. But i must have driven a good 20 mins from my house before taking pics. I know it couldn'tve taken on someone else's Internet cause there wasn't any signal around nor was I shown as connected.

 

[LJ50]

I believe it doesn't need to be "connected" to a Wifi access point in order to use it to determine location.

IIRC Apple used to use a system called "Skyhook", but now use their own proprietry system.