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    Re: Wobbly Prime Meridian
    From: Gary LaPook
    Date: 2010 Nov 22, 18:17 -0800

    One minute of longitude is 1852 meters at the equator but progressively smaller as you approach the poles, it varies with the cosine of the latitude. The cosine of 51� 28.674' is .6228 so the error is 1852 meters times .088 times .6228 which comes to 101.50 meters.

    gl
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