I'd love to know the long and lat of the magnetic pole, it would explain this even better. Love it as a topic of discussion though.
I have an interesting web toy relating to this, here - http://hoh.me.uk/geo BobH. ----- Original Message ----- From: "Sieghard Weitzel" <siegh...@live.ca> To: <viphone@googlegroups.com> Sent: Thursday, June 02, 2016 3:47 PM Subject: RE: The Compass geo graphical north button As Rob explained, there is a difference between "true" or "geographical" north and "magnetic" north. The world is on a slight elliptical path hence the magnetic north pole moves around a bit although I believe it is not moving like 10 Km from one months to another. In any case, you would have to Google what the so-called "declination" is for where you live to find out how much the true and magnetic north differ. The further north you live the more is the difference. Here where I live in northern British Columbia, Canada, the difference is about 22 degrees. Best regards, Sieghard -----Original Message----- From: 'RobH.' via VIPhone [mailto:viphone@googlegroups.com] Sent: Thursday, June 2, 2016 12:48 AM To: viphone@googlegroups.com Subject: Re: The Compass geo graphical north button The only differences I know of are megnetic and "True" north, with maybe 3deg or so difference. 3Deg or so on or off target might be important. "Geographic" north might be a new name for "True" north, the pole around which our planet rotates. so the magnetic pole is off, but no idea on what longtitude. So the difference on the compass would vary depending where you are in the world. E.g: if you were on that longtitude, or itsopposite, then magnetic would indeed be true! ----- Original Message ----- From: "Terje Strømberg" <terjestrmb...@gmail.com> To: <viphone@googlegroups.com> Cc: "Terje Strømberg" <terjestrmb...@gmail.com> Sent: Thursday, June 02, 2016 7:57 AM Subject: The Compass geo graphical north button Hi, The Compass geo graphical north button in IOS 9. Settings, compass. What is the benefit of turning it on or off? What is it, compared to normal compass north? Take care -- The following information is important for all members of the V iPhone list. If you have any questions or concerns about the running of this list, or if you feel that a member's post is inappropriate, please contact the owners or moderators directly rather than posting on the list itself. 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