[Proj] Little sphere projection

Carlo A. Bertelli (Charta s.r.l.) carlo.bertelli at gmail.com
Mon Aug 8 03:06:09 EST 2011

Thank you for the idea of the radar, that's the image I have in my
mind. But I'm not able to find the proper parameters for proj.
That projection seems to be the same that Snyder calls "Oblique
Azimuthal Equidistant", but I cannot find any
non-cylindrical/non-conic Equidistant projection in proj. Could the
spherical be a special case of conic projection? Should the "ob_tran"
(General Oblique Transformation) be used in this case?
I think this could make things even more difficult to handle.

-- Clifford J Mugnier cjmce at lsu.edu  on Sun Aug 7 21:49:59 EST 2011 wrote:

> For any individual Abbey, the azimuthal equidistant projection (originally
> invented by the monk, Postel) might do in either a spherical or an
> ellipsoidal case.  This projection is identical to what is viewed on a
> radar screen.  The French Hatt projection is one variant used for
> hydrographic projections of harbor surveys in the 19th and early 20th
> centuries.
> Clifford J. Mugnier, C.P., C.M.S.
> Chief of Geodesy,
> Center for GeoInformatics
> Department of Civil Engineering
> Patrick F. Taylor Hall 3531
> Baton Rouge, LA  70803

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