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    Re: On the integration of location and data
    From: Greg R_
    Date: 2009 Nov 2, 23:19 -0800

    Peter Fogg  wrote:
    
    > Isn't it via reference to the location of the
    > place you want to get to, and the track between
    > them?
    
    What Peter said... Once the vehicle starts moving the GPS (at least all of the 
    ones that I've ever used) knows both where it is and its current 
    direction/speed - from that it's easy enough to figure out how to get to the 
    next waypoint.
    
    --
    GregR
    
    --- On Mon, 11/2/09, Peter Fogg  wrote:
    
    > From: Peter Fogg 
    > Subject: [NavList 10402] Re: On the integration of location and data
    > To: navlist@fer3.com
    > Date: Monday, November 2, 2009, 9:45 PM
    > 
    > 
    > 
    > 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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