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    Re: Lewis and Clark, and River Navigation
    From: George Huxtable
    Date: 2003 Dec 10, 21:28 +0000

    Yesterday, I asked for algorithms for translating, in both directions,
    between UTM (Universal Transverse Mercator) zone 15, and ellipsoidal lat
    and long, to within, say, a quarter-mile.
    For my purposes, more precise definitions of datum, such as WGS84, are
    quite unnecessary, but would do no harm.
    I'm not bothered about altitudes, just the conversion of the x and y coordinates
    Thanks to Mark Bernstein, who has kindly drawn my attention to  a couple of
    web sites which offer to make such a calculation for me. However, these are
    both Microsoft-based and will not be runnable on my old Mac.
    Anyway, what I really need is an algorithm for making such a calculation
    for myself, rather than a website to do it for me. So my request for help
    still stands, if anyone is able to meet it.
    contact George Huxtable by email at george@huxtable.u-net.com, by phone at
    01865 820222 (from outside UK, +44 1865 820222), or by mail at 1 Sandy
    Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.

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