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    Re: Haversine- how to derive it?
    From: Hanno Ix
    Date: 2015 May 18, 12:26 -0700
    Geoffry,

    I made a mistake.
    I sent another email right behind this one to retract.

    Nice hearing from you, though!

    H

    On Mon, May 18, 2015 at 9:06 AM, Geoffrey Kolbe <NoReply_GeoffreyKolbe@fer3.com> wrote:



    On Mon, May 18, 2015 at 4:11 AM, John Brown <NoReply_JohnBrown@fer3.com> wrote:

    Hanno

    Your list of virtues of the haversine are IDENTICAL to those of the versine, so why do we need to divide by 2?


    ​From volume 2 of the Admiralty Navigation Manual, 1938, page 246

    "The advantages (as noted by Hanno) also apply to the versine, but the haversine is preferable because its limiting values 0 and 1, make the construction of logearithmic and other tables comparatively simple, whereas the limiting values of the versine, 0 and 2, do not."

    Geoffrey Kolbe​


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