Question about the compass

Discussion in 'iPhone' started by kenbrinkman, Jun 19, 2009.

  1. kenbrinkman macrumors regular


    May 20, 2009
    Daytona Beach, FL
    Would the magnetometer display an accurate heading if the iPhone was not parallel to the ground? Say, if it's mounted on the dashboard of a car, perpendicular to the ground and direction of travel, would it still work?

    What do you guys think?
  2. Resist macrumors 68030

    Jan 15, 2008
    Would it work if the iPhone was upside down? Think about it for a minute.

    For it to work correctly it has to have a reference point, which is being parallel to the ground or horizontal, just like a real compass needs to be.
  3. dancavallaro macrumors regular

    Jul 13, 2008
    The compass in the 3GS works whether it's parallel or perpendicular to the ground. Orientation doesn't seem to matter.
  4. PNutts macrumors 601


    Jul 24, 2008
    Pacific Northwest, US
    Magnetic compasses are influenced when inside a car. You should recalibrate in the car to get the best reading.

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