How accurate is the iPhone 3G GPS for measuring Distances between two CLLocation? -

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In my application the user will keep the iPhone and will run in a straight line, the iPhone will alert the user to make the Lux every 2 meters. And record them. Is there enough GPS for this kind of work on the iPhone? (Given that this place is the airport runway and should have a clear reception of GPS satellite signals ...)

No, you will not get that good about the 2 meter range of GPS, and usually requires no growing time 10 M thinks what you should get, though I get worse and (from above Clearly wet) Has heard better.


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