-- You should never blindly follow consumer-level GPS. Full stop.
Especially in remote areas/national parks/widerness areas. Hate to say this is "common sense", but really it should be. It really has nothing to do with Apple, the iPhone, or iOS. Its quite the opposite, there are errors on all sorts of digitized maps. Most people are not aware or the vintage of the underlying mapping data (pre-digitization) and the variances of map-set data even amonst variant databases of "real maps".
-- You should never blindly follow consumer-level GPS. Full stop.
Especially in remote areas/national parks/widerness areas. Hate to say this is "common sense", but really it should be. It really has nothing to do with Apple, the iPhone, or iOS. Its quite the opposite, there are errors on all sorts of digitized maps. Most people are not aware or the vintage of the underlying mapping data (pre-digitization) and the variances of map-set data even amonst variant databases of "real maps".