I remember hearing this on reddit but the post is mirrored at http://www.volnation.com/forum/pub/127425-iphone-bug-2.html#post4924534 http://www.volnation.com/f

I remember hearing this on reddit but the post is mirrored at http://www.volnation.com/forum/pub/127425-iphone-bug-2.html#post4924534 http://www.volnation.com/forum/pub/127425-iphone-bug-2.html#... 'Look at the video for session 115, "Using Core Location in iOS". Skip to around 13:45 for the discussion of "Course Cell Positioning" where they discuss the cache in detail.'