[OSRS-PROJ] Roussilhe Oblique Stereographic
gerald.evenden at verizon.net
Wed Mar 10 14:20:10 EST 2004
Obscurity is a matter of perception. Because I cannot walk down to my
library and find the reference or expect them to come up with a copy in
weeks, then it is obscure in my books. I suspect I would have trouble
a copy of the work in Boston. As a minor side issue, I would rather
an article in French rather than Polish (no offense to the Poles,
please). It is
just that the language has no superficial resemblance to the germanic
based languages I am used to. Reminds me of the Chinese article I
For printed references readily available there is: 1) Bugayevskiy,
Snyder p. 169,
and two versions in 2) Yang, Snyder and Tobler pp. 19--21, 3)pp
1 and 2 my be similar but 3 is based on a transfer through Gauss-Kruger.
Interestingly, the Polish web paper I picked up gave a version that
similar to 3. With the Polish paper I think I could do a complete
(forward-inverse). The book sources mostly ignore inverse projections.
Lastly, we still do not have a concrete bibliographic reference to
Roussilhe's original work---I can't take " It is published in the open
Hydrographique" journals of the early 1900s." to my reference desk and
expect anything but a blank look.
On Mar 9, 2004, at 10:51 PM, Clifford J Mugnier wrote:
> Roussilhe once was the Hydrographer of the French Navy. His oblique
> stereographic projection is discussed by me in my September 2000
> column on
> the Grids and Datums of Poland. (www.ASPRS.org/resources.html)
> this is a double projection similar to what the late John P. Snyder
> presented, John chose not to present the complete direct and inverse
> formulae (that he asked for and that I mailed to him in the middle to
> 1980s) since it was not a specific math model used by the United States
> Geological Survey.
> Roussilhe's work is not obscure. It is published in the open "Annals
> Hydrographique" journals of the early 1900s. However, you DO have to
Jerry and the low riders: Daisy Mae and Joshua
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