The Roussilhe oblique stereographic projection
was a mapping projection
developed by a hydrographer
of the French Navy in the late 19th century, and originally published in Annals Hydrographique
. All ellipsoidal oblique stereographic projections developed and used worldwide before WWI were based on Rousilhe’s work.
The development of the Bulgarian oblique stereographic projection was done for Romania by the Bulgarian geodesist, Hristow, in the late 1930’s. Others in Europe, notably the Dutch, developed oblique stereographic projections for use in mapping their specific countries.
The projection is largely ignored by commercial GIS software packages. But the modern U.S. GS50 map projection was developed from it.
- libproj4 cartographic projection library with Roussilhe oblique stereographic projection support