I am aware that only iPads with cellular offer GPS, but there is also the possibility of localization through WiFi. But I don't know whether this option is available for iPads with WiFi only. So, is this possible with current generation iPads? I realize, if possible, the localization quality will be much worse compared to localization with GPS. But let's say I am in a really big city (New York or Tokyo, for example), how are my chances to actually get a rough localization with WiFi only - and how rough would it be? Basically, I am currently pondering whether I have to buy a cellular model (don't need the cellular only the GPS), or whether I can get along with WiFi localization. I would only need it to get a rough position when I am completely lost in an unknown city.