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    Re: On the integration of location and data
    From: Peter Fogg
    Date: 2009 Nov 3, 16:45 +1100


    Lu wrote:

    While a "traditional" GPS doesn't necessarily have or need a built-in
    compass, if one thinks about it for a moment one realizes that
    automotive navigational systems DO need a built-in compass.   Else if
    you punch in an address while parked, how would they know whether or not
    to make the first instruction "make a U-turn?"
    Isn't it via reference to the location of the place you want to get to, and the track between them?

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