(Great news. I've just found I have a GPS in my iPad) -WRONG!

Discussion in 'iPad' started by ammcfc, Apr 13, 2010.

  1. ammcfc macrumors member

    Aug 23, 2008
    Great news. I've just found I have a GPS in my iPad.
    I 'm always wondering how iPad find my location on Maps Apps.
    So... I installed iGo My Way..and guess what...I have a gps chip!!!!
    My model is 16GB - 499$

    It's all about Skyhook technology... I've never supposed that Skyhook is so accurate in urban area. Better than GPS at some locations.
    The case is closed ;)
    Cheers for my stupidity

  2. stridemat Moderator


    Staff Member

    Apr 2, 2008
    Does it not use WiFi to find your approximate position?
  3. ammcfc thread starter macrumors member

    Aug 23, 2008
    No. there is no signal in my room. Just outdoor.
  4. nStyle macrumors 65816

    Dec 6, 2009
    Yeah but there has to be Wifi outside of your home.

    Pretty sure stridemat's signature covers it.
  5. ammcfc thread starter macrumors member

    Aug 23, 2008
    Do you see wi-fi icon at the screenshot? Look at the gps signal on the right....
    I guess Apple doesn't have enough mainboards for the launch day and start assembling iPads with gps chip.
  6. aduteau macrumors 6502a

    Oct 14, 2007
    oh my god ... from what I was reading all over the forums .. was that the Wi-fi version of the iPad needed a Wi-fi connection to get the assisted GPS on ...

    Are you saying that you are not Wi-fi connected when using GPS ?
    If so does that mean that the Wi-Fi version of the iPad has a GPS chip.???

    Oh boy ... I was waiting for the 3G version just to get a GPS chip in my iPad ... did I go wrong ??
  7. JonboyDC macrumors regular

    Jul 19, 2004
    No GPS. It's just using the Skyhook system to approximate your location based on the strength of the wi-fi signals from known hot spots. It's the same tech that allows the original iPhone and the iPod Touch to determine your general location (along with triangulation from cell phone towers, for the iPhone). Because there's not cell chip and no GPS chip in your iPad, the location services will only work if it can locate some known hot spots.

    Also, for the record, this is not assisted GPS. Assisted GPS uses triangulation from cell-phone towers to supplement an actual GPS chip. Things like Skyhook and cell tower triangulation are work-around replacements for GPS, but they're not GPS (assisted or otherwise).
  8. nStyle macrumors 65816

    Dec 6, 2009
    I call bs. Have you actually drove in your car with it?
  9. Julien macrumors G4


    Jun 30, 2007
    There are no 3G's out yet so you don't have it. You just have standard WiFi triangulation.
  10. Zethca macrumors regular

    Mar 12, 2007
    No. There is no GPS. You are mistaking WiFi location services for GPS.
  11. ammcfc thread starter macrumors member

    Aug 23, 2008
    Igo My Way works only with valid GPS signal. Tomorrow I will make a movie showing navigation in action ;)
  12. 4DThinker macrumors 68020

    Mar 15, 2008
    Hey OP. Turn off your Wifi and try again. Don't let the app turn it on again if it asks to. Also please take a screen shot of your setting menu showing the GPS toggle.
  13. jtara macrumors 65816

    Mar 23, 2009
    You are misunderstanding the "GPS signal strength" indicator in the app. If the app claims to have such, it is misrepresenting what it means.

    There is NO WAY to determine GPS signal strength on an iPhone or iPad. An app can only determine the estimated accuracy of the location system. The location system determines your location based on GPS, WiFi signals registered with Skyhook, tower triangulation (if you have a cell radio, so no go for iPad WiFi or iPod Touch), or IP address.

    Unfortunately, the location system doesn't tell the app what method it is using. The app can guess based on the hardware model and reported accuracy, but it is just a guess.

    I've written GPS software for the iPhone, and I have to admit I have a "signal strength indicator" kinda thingy (that changes color from black to red to yellow to green) but don't represent it specifically as such. So, I'm pretty familiar with how the location API works.
  14. leomac08 macrumors 68020


    Jul 12, 2009
    Los Angeles, CA
    If the OP would open his iPad up and takes a picture of the GPS chip, I would believe him with no doubt!;)
  15. highdefjunkie macrumors 6502


    Apr 12, 2010
  16. nStyle macrumors 65816

    Dec 6, 2009
    Stop trying to start a ruckus. You don't have true GPS...
  17. jtara macrumors 65816

    Mar 23, 2009
    It's using the last known location, from the last time it was connected to the Internet. This would be based either on WiFi or IP address.

    Yes, you will be able to drive around and your reported location will change. You don't have to actually be connected to a WiFi router for it to use it for location. Any WiFi signals that it sees (and you are going to see plenty driving around in a dense city) it will look-up in the Skyhook database.

    This might actually be useful for navigation in a big city. Take it out to an unpopulated rural area. Fail.
  18. avaloncourt macrumors 65816

    Oct 18, 2007
    I want to see the actual map not a screen shot of a turn instruction.

    Looking forward to your video of it in operation because you're the only person on the planet with a Wi-Fi model that contains GPS.
  19. Sleazy E macrumors 65816

    Sleazy E

    Nov 24, 2009
    would be great news if true but I am thinking it probably isn't.
  20. skubish macrumors 68030


    Feb 2, 2005
    Ann Arbor, Michigan
    Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_1_3 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7E18 Safari/528.16)

    Sorry Charlie. Thanks for playing. You are just using skyhook. Most gps apps will work with the wifi triangulation. Ifixit has already taken apart the ipad and confirmed no gps chip.
  21. ammcfc thread starter macrumors member

    Aug 23, 2008
    A friend of mine will make a movie soon. Be patient. I hope after a hour I will prove my statement ;)
  22. Bodhi395 macrumors 6502a

    Jul 23, 2008
    No way there is GPS, there has been tear downs of the ipad already and none have revealed any secret GPS chip.

    They wouldn't just stick some in WIFI only units, even if they had extras. They would just save them for use in 3G units.
  23. ammcfc thread starter macrumors member

    Aug 23, 2008
    GO My way 2009 depends on the built-in Location Services of the iPhone operating system. You can navigate with iGO My way 2009 as soon as the iPhone receives the GPS signals, calculates the position and makes it available for the applications.

    Please note however, that there are applications that do not require accurate, GPS-based location information. These applications may operate with the far less accurate GSM network-based location information. Unfortunately this location method is not accurate enough for turn-by-turn navigation.

    Furthermore, even the GPS-based location may be (or may become) inaccurate under some conditions. iGO My way 2009 requires a relatively high level of accuracy in order to be able to provide accurate guidance. Other applications may set a lower threshold.

    When your iPhone loses the GPS signals, or when the location becomes inaccurate (due to whatever reason), iGO My way 2009 doesn't immediately announce that the position is lost. Instead, it applies sophisticated algorithms (considering e.g. road geometry*) in trying to predict the most likely position and to continue guidance. However, as the level of uncertainty gets beyond a threshold, it would be too risky to pretend to know the location. Setting this threshold was the result of carefully balancing perceived service quality versus the risk of wrong guidance.

    Tip: Watch for the little brown dot around the vehimarker - that represents the last location data as received from the iPhone OS, and iGO My way 2009 displays that without any delay or filtering. Sometimes that dot lags significantly behind the vehimarker.

    * Tunnels are special cases: in tunnels, iGO My way can safely assume that you are moving along the road and can continue location display and guidance based on the speed at which you entered the tunnel.
  24. Aduntu macrumors 6502a


    Mar 29, 2010

    I have some scars on my palm... I didn't believe it at first, but I think I'm Jesus.
  25. jtara macrumors 65816

    Mar 23, 2009
    LOL, like I said take it to an unpopulated area. Dunno where you live, I can get to the dessert in an hour. That's the only way to prove it.

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