[GRASS-user] Rotate a map display

[Markus Neteler]

On Wed, Apr 15, 2009 at 7:28 PM, Vincent Bain <bain at toraval.fr> wrote:
> Jérôme,
>
> If you need to warp a map for a strict display purpose, IMHO it's not to
> be performed from within grass given that this operation makes no sense
> "geographically". Don't know what the context is, but if you just have
> to rotate an image output of a map maybe you'd better look towards image
> manipulation tools (e.g. imagemagick and the -rotate option, which can
> easily be integrated in a script process).

Perhaps you can use the CAIRO driver.
In CAIRO, I see cairo.Matrix.rotate()
http://cairographics.org/documentation/cairomm/reference/classCairo_1_1Matrix.html

Just an untested idea, I am not familiar with the CAIRO driver in GRASS.

Markus