Subject: RE: special to ron & dave<br/>
Date: Sep 13, 2004 @ 13:53<br/>
Author: Ron McConnell (&quot;Ron McConnell&quot; &lt;rcmcc@...&gt;)<br/>
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<div id="ygrps-yiv-422448639">&quot;aletheiak&quot; says,<br/>
&quot;...the length of a minute of latitude at<br/>
the 49th parallel as 1853meters plus 508mm<br/>
& borrowing directly ...<br/>
  &lt;<a rel="nofollow" target="_blank" href="http://home.online.no/~sigurdhu/Grid_1deg.htm">http://home.online.no/~sigurdhu/Grid_1deg.htm</a>&gt;<br/>
i have it as 1853meters plus 500mm<br/>
so which is truer <br/>
& how many digits are reliable in any case?&quot;<br/>
<br/>
Vincenty & Sodano =  1853.496  m<br/>
USCG POSAID2      =  1853.5016 m<br/>
Both round to 1853.50m<br/>
<br/>
We just returned home.  I&#39;ll try to study<br/>
the rest of the message later after<br/>
taking care of chores.<br/>
<br/>
Cheers, <br/>
<br/>
Ron McC.<br/>
<a rel="nofollow" target="_blank" href="mailto:w2iol@...">w2iol@...</a><br/>
<br/>
Ronald C. McConnell, PhD<br/>
<br/>
 WGS-84: N 40º 46&#39; 57.6&quot;  +/-0.1&quot;<br/>
         W 74º 41&#39; 22.1&quot;  +/-0.1&quot;<br/>
         FN20ps.77GU31 +/-<br/>
         V +5058.3438  H +1504.2531<br/>
<br/>
 <a rel="nofollow" target="_blank" href="http://home.earthlink.net/~rcmcc">http://home.earthlink.net/~rcmcc</a></div>