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    Re: Location Center of Responses thus Far
    From: R.H. van Gent
    Date: 2001 Jul 24, 4:46 PM

    Herbert Prinz wrote:
    
    > The implementation Robert van Gent suggests does not work in the general case.
    > This throughs some light on the adequance of  George Huxtable's beach ball model.
    
    True, my method and anyone else's method will not work if the locations
    are spread nearly evenly across the globe. Then the resulting vectors
    will nearly cancel each other out.
    
    My method was originally developed, I believe, by people who study
    ancient geomagnetic poles and want to determine a sort of average pole
    from a set of individually determined poles located near to each other.
    
    The method does has the advantage that it can be easily programmed and
    from the 18 lat-long pairs mentioned in the recent NAVIGATION-L
    postings, I have obtained the following position for the centre of
    gravity (projected onto the Earth's surface)
    
      Lat = 57.8 degrees   Long = 87.0 West
    
    On the atlas, this corresponds with a watery spot in the Hudson Bay, not
    far from Fort Severn. Of course, this is only interesting as a
    mathematical exercise and one can justly argue whether this is the best
    method.
    
    I agree that it would be far more practical to organize such a meeting
    somewhere on the North American east coast, preferably at a location
    with a maritime tradition.
    
    ========================================================
    * Robert H. van Gent * Tel/Fax:  00-31-30-2720269      *
    * Zaagmolenkade 50   *                                 *
    * 3515 AE Utrecht    * E-mail: r.h.vangent{at}astro.uu.nl *
    * The Netherlands    *                                 *
    ********************************************************
    * Home page: http://www.phys.uu.nl/~vgent/homepage.htm *
    ========================================================
    

       
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