[GRASS-user] [GRASSLIST:1183] how to rotate raster in GRASS ?

[Pierluigi De Rosa]

Thanks Jarek for your answer!!

Yes I have to rotate a DEM, so I wont to lose the orientation North South...
I would to rotate a DEM of a specific angle.

R can do it?
After importing DEM in R which is the R command to rotate a spatial data 
frame??

Pierluigi

Alle 18:16, mercoledì 30 agosto 2006, Jarek Jasiewicz ha scritto:
> Pierluigi De Rosa napisa?(a):
> > Dear GRASS users,
> > I have a strange problem to solve, I'm using a program called CAESAR
> > (GNU Project) to model river processes (http://www.coulthard.org.uk/).
> > This program nedds an ASCII input elevation file where the main
> > direction of floe is from left to right, so the catchment exit point
> > has to be in the right hand of the DEM.
> > Does Anyone know how is possible to rotate a raster in GRASS?
> > Thanks
> > Pierluigi
> > ------------------------------------------------------------------------
> >
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>
> I don' understand rotate or rather flip
>
> If you useing R, it can be simply done after transferring elevation dem
> to R and simply use trasforming matrix function t() Next it can be
> trennsfered back to grass or exported strictly from R. Unfortunatly I
> can't give you exact formula because I don'n know what you have and what
> you need
>
>
> Regards
> Jarek