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    Re: Wobbly Prime Meridian
    From: Gary LaPook
    Date: 2010 Nov 23, 01:23 -0800

    To be really exact about this discussion, one minute of longitude at the equator is equal to the one "geographical mile" of 6,087 feet, 1,855 meters. Multiplying this by the cosine of the latitude of Greenwich makes one minute of longitude at that location 3791 feet (1155.5 meters) long. The GPS discrepancy of .088' makes it 333.6 feet, 101.7 meters.

    gl
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