[Proj] proj4 specifications for a rotated latlon grid on a sphere?

[Martin Ivanov]

Thank you all very much for your replies. I tried the suggestion of 
Herman Peifer and it worked perfectly.
The only thing is, as Herman has already noted, that to get get the 
coordinates in the rotated grid one has to use
invproj, and to get the coordinates back to longlat one has to use proj.

Best regards

-- 
Dr. Martin Ivanov
Eberhard-Karls-Universität Tübingen
Mathematisch-Naturwissenschaftliche Fakultät
Fachbereich Geowissenschaften
Water & Earth System Science (WESS)
Hölderlinstraße 12, 72074 Tübingen, Deutschland
Tel. +4970712974213