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    Captain Cook and plane table
    From: Richard M Pisko
    Date: 2009 Jan 30, 23:52 -0700

    On Wed, 28 Jan 2009 00:46:20 -0700, Nicol�s de Hilster  
    > For what I understood Cook charted New Zealand using a plane table from
    > a ship and still did quite a proper job. He must have used similar
    > techniques to get his positions right.
    I liked that recent CBC-TV hour on Cook, at least the part that included  
    the very good survey of Newfoundland.  It did show him doing the work from  
    the beach with a simple vane alidade, but I believe reading angles with a  
    sextant and plotting them with a station pointer would let him do good  
    work from the deck of an anchored ship.
    The charts he made of the coastline of NL were shown on the program (I  
    hope they were the real ones) and a little "photoshopping" was done to  
    superimpose Cook's on the older charts, and then on the most modern  
    version.  He did what looked to be excellent work.  I wonder if he had a  
    way to keep the sextant level, so as to avoid taking the "slanted" angle,  
    while still being able to align his chosen reference stations.
    Were your shore stations in Nigeria set up to be more or less at the level  
    of your chart room on the ship?  It wouldn't make very much difference, I  
    suppose, but I do wonder if the effort was thought worth-while.
    Richard . . .
    Using Opera 9.2.4 after the "Dog" died
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