GPS accuracy in Maps

Discussion in 'iPhone' started by vbman213, Aug 3, 2010.

  1. vbman213 macrumors 6502

    Joined:
    Apr 13, 2010
    #1
    Driving home today, I decided to whip out my iPhone 4 to test out the GPS accuracy... It found me very quickly, but the blue dot was on the side of the road I was currently driving on... :/ The dot was not exactly on the road. Is there a problem with my GPS chip?
     
  2. futbalguy macrumors 6502

    Joined:
    May 16, 2007
    #2
    i am going to say its probably fine since we are talking about gps in a cellphone. how far of a distance would it have been off by (50 feet?) and for what amount of time was it doing this?
     
  3. vbman213 thread starter macrumors 6502

    Joined:
    Apr 13, 2010
    #3
    Probably. Not sure how long. Not too long. Also my compass was acting a little strange too while in the car. Apparently something was causing interference. I had to recalibrate it. The compass direction \ / was very very wide. Wider than I'd ever seen it before.


    How can I test to make sure my GPS chip is not damaged. I did drop my iPhone onto soft carpet from about 2 feet. With a case btw. Just worried that I'm now finding issues that were caused by the fall. And fwiw, I have ZERO cosmetic damage from the drop. Externally, you would have no idea it feel. No cracks/scraps/dents/etc.
     
  4. kaelell macrumors 6502

    Joined:
    Nov 16, 2009
    #4
    I think as a result of the drop you are more sensitive to finding flaws, its normal to do that. I wouldnt worry, the gps can sometimes be off like that, especialy in built up areas.
     
  5. TruckdriverSean macrumors 6502a

    Joined:
    Feb 28, 2009
    Location:
    Texas, US
    #5
    Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0_1 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A306 Safari/6531.22.7)

    Not uncommon for a GPS device to be off by a little bit sometimes. Also consider that mapping isn't perfect either. Plus your in a vehicle.

    If you want to test it, walk outside into your yard (clear view if the sky) and sit tight for a few minutes. It may fluctuate a tiny bit. (one or two meters left... Back again. One or two meters up... then back again)

    Almost forgot, there was one of those sunspot plasma thingies a few days ago. That can make radio and sat. stuff act a little weird.
     
  6. Techlover90 macrumors member

    Joined:
    Jul 5, 2010
    #6
    I find gps is working quite accurately. Even navigating at 35mph, the location bubble refreshes every few seconds. I'm quite happy.
     
  7. Ward macrumors newbie

    Ward

    Joined:
    Jul 5, 2009
    Location:
    Piloting a miniature submarine in your brain.
    #7
    GPS is generally accurate to witin a few metres at best for commercial devices. If your position is within that after a while with a clear view of the sky, then there is nothing wrong. Your GPS is fine.

    Your compass will not work well in most cars since there is a lot of magnetic interference from the dash and the engine.
     
  8. huskerchad macrumors regular

    Joined:
    Jul 17, 2002
    #8
    This. If you have a good old-fashioned analog compass, try it out in your car. I haven't had one work in a car for many years (luckily they tend to be installed in newer cars along with driver's consoles or nav systems).
     

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