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Discuss turn-by-turn GPS on iPhone 3G, whats the story? at the iPhone 3G - Hackint0sh.org; I did a google on the subject and found a whole pile of conflicting information. ...
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    Default turn-by-turn GPS on iPhone 3G, whats the story?

    I did a google on the subject and found a whole pile of conflicting information.
    Can someone tell me:
    1.Is there a turn-by-turn GPS navigation app for the iPhone 3G available yet? (app store, jailbroken or whatever)?
    2.Is there any technical reason (e.g. hardware not capable enough, apples location APIs not good/fast enough, whatever) why a turn-by-turn navigation app could not be written as things stand?
    3.Has anyone heard any official position from apple as to why their SDK license prohibits turn-by-turn navigation apps?
    and 4.Is anyone working on an iPhone turn-by-turn GPS navigation app? (if someone wrote a turn-by-turn GPS navigation app for jailbroken iPhones that used google maps maps or something it would give a lot of people a BIG reason to jailbreak their 3G)



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    The maps app on your phone can route your trip, and give you the steps to when to turn and all, but it does not update the steps automatically or talk to you. There is a company (Garmin or someone) that's working on software for this, but rather than that I don't know.
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    this is something i would be interested to, it really easy the ONLY thing the Almost GPS in the phone is missing

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    I heard the GPS reception is weak too. I'm gonna get one next week so that I can form a first hand review.

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    i was just wondering why the gps doesnt work on other countries, i am in brazil and the gps just load loads but doesnt find my position, even if I am at a open space with wifi it doesnt work, it should work all over the world right: ?


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    J to the T. Shaken, not Stirred Array thecompkid's Avatar

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    Most dedicated GPS's supplement traditional GPS technology with a land-based tracking system, such as WAAS. There is nothing in the iPhone 3G GPS Chipset's data sheet to indicate that it utilizes such a system. That being said, one could easily make the argument that cell tower triangulation more than makes up for the absence of WAAS when combined with actual GPS.

    Either way, you don't need an incredibly accurate GPS fix to do turn-by-turn navigation. If you've ever closely watched a car GPS as it's routing you, you'll notice that it has many software compensation algorithms. It will, most of the time, 'snap' you to a road that is within your circle of accuracy rather than assert that you are driving through buildings or a field at 70 MPH. It will also assume that you made the right turn for a brief moment, even if you missed it, because it needs to wait until the correct path is out of that circle of accuracy. The list goes on.

    The iPhone 3G doesn't currently employ any of these tactics to the best of my knowledge, so it appears to be weak and inaccurate in the shadow of more refined software. Just give it time, once the real turn by turn software comes out, we'll get the final verdict.

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    WAAS is for airplane navigation, not for the automotive GPS.

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    lots of rumours and lots of confusion.
    rumours that tomtom already have a version working, rumours that telenav are creating a version. rumours that the gps device isnt good enough, rumours that apple wont allow it on the app store. lots of confusing rumours.
    basically only thing we can do is wait and see, if thers nothing released by january ill start to worry.

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    Quote Originally Posted by vidra View Post
    WAAS is for airplane navigation, not for the automotive GPS.
    Not true, sorry. Most Garmin auto GPS units use WAAS or EGNOS for precise location these days. So do almost all bluetooth GPS "mice". It's getting to be an almost standard feature now outside aero applications

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    J to the T. Shaken, not Stirred Array thecompkid's Avatar

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    Quote Originally Posted by vidra View Post
    WAAS is for airplane navigation, not for the automotive GPS.
    Yes, it began as an aeronautical technology, but it has since trickled down into the consumer's hands.

    Unfortunately for you, the wikipedia article doesn't mention the broader applications.


 

 
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