[OSRS-PROJ] Oblique Stereographic

[Clifford J Mugnier]

That mathematical routine only applies to the Oblique Stereographic Double
(per the Canadian Maritime Provinces, such as Prince Edward Island).  I
believe the French Navy Roussilhe Oblique Stereographic is different, and I
know the Bulgarian Hristow Oblique Stereographic is quite different.  A
particular truncation of the Hristow is used for the "Romanian Stereo 70."
Others exist.

See "Zeitschriff fur Vermessungswessen," circa 1930s-1940s.

In regard to the "new" projections, the "double" technique with the
Gaussian (conformal) Sphere is about 100 years old ...

Cliff Mugnier
LOUISIANA STATE UNIVERSITY

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I think I make a statement earlier today that I was on a roll.
Well as of this evening the forward for the alternate
Oblique Stereographic checks with the EPSG bench mark.

After checking with the general description from EPSG and one
of Snyder's books, the projection looked like another variation
on the work I did on Krovak.  So being a good thief I copied
the Krovak over, replaced the conic with the spherical
oblique stereographic from Snyder and ... .

I think there might be a general routine here, like the oblique
stuff in libproj that will do the conformal sphere transform and
then call the spherical projection of your choice.  Hey, you folks
can cook up a bunch of new projections and give them names of
your choice.

Time to pull the switch and get ready for the "Daily Show."

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