[Proj] looking for the right params for RSO

OvV_HN ovv at hetnet.nl
Thu Sep 2 05:25:21 EST 2010

Van: proj-bounces at lists.maptools.org namens Mikael Rittri
Aan: PROJ.4 and general Projections Discussions
CC: Christoph Dohmen
Onderwerp: Re: [Proj] looking for the right params for RSO

I think the gamma parameter for omerc isn't yet supported in Proj.4.


Hermann Peifer gave the solution to use the +rot_conv flag instead.


Indeed, if I'm not mistaken, in PROJ only an alpha parameter is supported. 
But if you use +rot_conv, then the alpha is taken as a gamma.

In Evenden's libproj software both alpha and gamma can be given 

By the way: is Kertau on the Everest 1930 ellipsoid or on the Modified 
Everest 1830 ellipsoid?

More information about the Proj mailing list