[Proj] Gauss-Schreiber: the continuing story

support.mn at elisanet.fi support.mn at elisanet.fi
Thu Jun 26 14:47:55 EDT 2008


Just noticed that:

> Laborde's Madegascar efforts were circa 1929 

Wikipedia is telling that  Jean Laborde lived (16 October 1805 in Auch -
27 December 1878 in Madagascar).


But is this some other person?

Regards: Janne


> "The Gauss-Schreider projection was developed about 1880 and used for the 
> Prussian land survey.  It consists of a double conformal transformation of 
> the  ellipse onto the sphere and then of the sphere onto the plane using the 
> spherical transverse Mercator projection.  The central merdian varies in 
> scale."
> And, of course, we have the IGN claim with Laborde in NT/G 73.  I am not sure 
> what the timing was but because Laborde's Madegascar efforts were circa 1929 
> then the best he can probably claim is rediscovering the projection.  The 
> Madagascar should not be confused with the NT/G 73 and I am only  using it as 
> a reference to one period where we know he was active as I do not have his 
> birth-death dates.

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