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    Re: Where is the Prime Meridian?
    From: David C
    Date: 2021 Dec 10, 22:53 -0800

    The preface to the 1983 edition of Nories Tables includes the following comment about the Ports of the World section:

    "Over 6,000 entries were needed for the 4,000 ports, the position of each being checked on the chart."

     In the pre-gnss era  the questions 'what chart' and 'what datum' probably did not arise. Norie gives the lat and long to  one moa which I assume is adequate to locate an unknown port any where in the world. Raper (1906)  has a list of maritime positions rather than Ports of the World. That probably explains why Raper includes Elephant Island, South Georgia and Castle Point but Norie does not.

       
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