<HTML dir=ltr><HEAD><TITLE>Re: [Proj] Gauss-Schreiber: the continuing story</TITLE>
<META http-equiv=Content-Type content="text/html; charset=unicode">
<META content="MSHTML 6.00.6000.16674" name=GENERATOR></HEAD>
<BODY>
<DIV id=idOWAReplyText63168 dir=ltr>
<DIV dir=ltr><FONT face="Times New Roman" color=#000000 size=2>Some other person, and a different century. The projection was cooked up by Laborde, a French Army Officer that later retired and taught mathematical cartography and geodesy in Paris. When he retired, he was a General officer. <EM>Traite des Projections</EM> was co-authored by him and Driencourt in 1934 or 1936 in two volumes published in Paris. Long out of print, it was only one edition and in French only.</FONT></DIV>
<DIV dir=ltr><FONT size=2></FONT> </DIV>
<DIV dir=ltr><FONT size=2>I have no idea if they were related ... curious coincidence if not. </FONT></DIV>
<DIV dir=ltr><FONT size=2></FONT> </DIV>
<DIV dir=ltr><FONT size=2>Cliff Mugnier</FONT></DIV>
<DIV dir=ltr><FONT size=2>LSU</FONT></DIV></DIV>
<DIV dir=ltr><BR>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> proj-bounces@lists.maptools.org on behalf of support.mn@elisanet.fi<BR><B>Sent:</B> Thu 26-Jun-08 13:47<BR><B>To:</B> PROJ.4 and general Projections Discussions; geraldi.evenden@gmail.com<BR><B>Subject:</B> Re: [Proj] Gauss-Schreiber: the continuing story<BR></FONT><BR></DIV>
<DIV>
<P><FONT size=2>Hello,<BR><BR>Just noticed that:<BR><BR>> Laborde's Madegascar efforts were circa 1929<BR><BR>Wikipedia is telling that Jean Laborde lived (16 October 1805 in Auch -<BR>27 December 1878 in Madagascar).<BR><BR><A href="http://en.wikipedia.org/wiki/Jean_Laborde">http://en.wikipedia.org/wiki/Jean_Laborde</A><BR><BR>But is this some other person?<BR><BR>Regards: Janne<BR><BR>-------------------<BR><BR>> "The Gauss-Schreider projection was developed about 1880 and used for the<BR>> Prussian land survey. It consists of a double conformal transformation of<BR>> the ellipse onto the sphere and then of the sphere onto the plane using the<BR>> spherical transverse Mercator projection. The central merdian varies in<BR>> scale."<BR>><BR>> And, of course, we have the IGN claim with Laborde in NT/G 73. I am not sure<BR>> what the timing was but because Laborde's Madegascar efforts were circa 1929<BR>> then the best he can probably claim is rediscovering the projection. The<BR>> Madagascar should not be confused with the NT/G 73 and I am only using it as<BR>> a reference to one period where we know he was active as I do not have his<BR>> birth-death dates.<BR><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></FONT></P></DIV></BODY></HTML>