<HTML dir=ltr><HEAD><TITLE>Re: [Proj] Terminology: what should I call 60 nautical miles?</TITLE>
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<DIV dir=ltr><FONT face="Times New Roman" color=#000000 size=2>One minute of arc distance at what latitude?</FONT></DIV>
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<DIV dir=ltr><FONT size=2>On a sphere, "longitude varies as the cosine of the latitude" but we're not on a sphere, are we?</FONT></DIV>
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<DIV dir=ltr><FONT size=2>This stuff is not complicated enough for lay people now, so we have to add another esoteric label to shorten "60 nm?"</FONT></DIV>
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<DIV dir=ltr><FONT size=2>C. Mugnier</FONT></DIV>
<DIV dir=ltr><FONT size=2>LSU</FONT></DIV></DIV>
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<FONT face=Tahoma size=2><B>From:</B> proj-bounces@lists.maptools.org on behalf of Gerald I. Evenden<BR><B>Sent:</B> Mon 27-Apr-09 09:05<BR><B>To:</B> PROJ.4 and general Projections Discussions<BR><B>Subject:</B> Re: [Proj] Terminology: what should I call 60 nautical miles?<BR></FONT><BR></DIV>
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<P><FONT size=2>On Monday 27 April 2009 7:12:18 am Mikael Rittri wrote:<BR>> Hello,<BR>> I would like a term for the length unit that is 60 nautical miles.<BR><BR>Dare I ask why?<BR><BR>The "nautical mile" is a rather old fashion term handy in the days of sailing<BR>on a chart with sextant and chronometer.<BR><BR>I thought everyone was supposed to go metric---an underachieved effort on this<BR>side of the pond.<BR><BR>> This length unit would approximate one degree of<BR>> arc distance, in the same way as one nautical mile<BR>> approximates one minute of arc distance.<BR>><BR>> I have thought of the phrase "degree of arc distance"<BR>> (which I think agrees, more or less, with how Snyder uses this phrase)<BR>> but some of my colleagues dislike it.<BR>><BR>> I have also thought of the phrase "exēntanautical mile",<BR>> from Greek "exēnta" = 60, but...<BR>><BR>> --<BR>> Mikael Rittri<BR>> Carmenta AB<BR>> SWEDEN<BR>> www.carmenta.com<BR>> _______________________________________________<BR>> Proj mailing list<BR>> Proj@lists.maptools.org<BR>> <A href="http://lists.maptools.org/mailman/listinfo/proj">http://lists.maptools.org/mailman/listinfo/proj</A><BR><BR><BR><BR>--<BR>The whole religious complexion of the modern world is due<BR>to the absence from Jerusalem of a lunatic asylum.<BR>-- Havelock Ellis (1859-1939) British psychologist<BR>_______________________________________________<BR>Proj mailing list<BR>Proj@lists.maptools.org<BR><A href="http://lists.maptools.org/mailman/listinfo/proj">http://lists.maptools.org/mailman/listinfo/proj</A></FONT> </P></DIV></BODY></HTML>