[GRASS-user] combining tiles

[Moritz Lennert]

On Mon, February 5, 2007 22:59, Tyler Smith wrote:
> Hi,
>
> I'm a brand-new Grass user. I'm working on an ecological niche
> modelling project, for which I'm using the WorldClim bioclimatic
> tiles. They are distributed as .bil files, which I've figure out how
> to get into Grass. I need to convert them to ESRI ascii grid formats,
> which I can also do.
>
> My problem is that I need the data from parts of four separate
> tiles. I've set up my location so that it will clip the appropriate
> section as I export the grids into ascii format, but the only way I
> can figure out to get the data into a single grid is to export each of
> the four tiles separately, manually cut off the headers, import the
> matrices into R, cbind() or rbind() them together, write.table them back
> to a file, and then put the header back on. This works, but it's
> tedious!
>
> There must be some Grass function to do this all in one step?

r.patch ?

Moritz