Oh yes there is! Well in the iPhone and the 3G & 4G iPads there is an accurate real GPS chip set True & as Scott mentioned, the WiFi only versions of the iPad don't have a real GPS and use phone masts and the internet to give a virtual position and require a stand alone device for autonomous and or accurate position fixing, but still work very well once one of these is utilised. I only bought the 4G version of the iPad3 for this reason & this reason alone as I didn't want another bit of kit to have to worry about interfacing. Although I'd expect that it would just work first time and always if it were an Apple approved deviceGary Stockton said:Just don't rely too much on your iDevice for nav work - it uses 'assisted GPS' which triangulates off cell towers and uses other tech to work out where you are - so elevation is often way out, and in poor-signal areas you're pretty stuffed. Or so I'm told. Don't think there is actually a GPS receiver in the iPhone or iPad?
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sae70 said:I took delivery of a new iPad3 in the last two weeks I ended up getting the 64Gb 4G one but you can run MM on both the 16Gb wifi version as well as the 16Gb 4G, if you get any of the wifi versions of the iPad you will need an additional BlueTooth GPS aerial. Not a concern with any of the 3G or 4G iPads as these all have a real GPS chip set built in. I also bought MemoryMap last week that is now staggeringly only £99 It's all loaded onto the iPad now from off of my normal PC through iTunes and works as sweet as a nut I did a 230miles journey on Wednesday with it running in the car mapping & tracking my route with no trouble, except for needing to be plugged in to charge as when the GPS is running it uses power a little quicker. The new Retina screen on my iPad3 is better than HD quality and has to be seen to be believed and with the brightness turned up was easy to read. I Will update with photos and more detail but I'm away from home at this moment in time and 'am short of time.
Hope that this has helped