[GRASS-user] combining tiles

[Tyler Smith]

On Tue, Feb 06, 2007 at 12:37:00AM -0600, Gerald Nelson wrote:

> Why not use r.patch in grass to combine them, use g.region to set a
> smaller region and export, or create a mask of the smaller region
> and have the mask set when you use r.patch?
> 
> Jerry

Yes, r.patch is the function I need, as several people have pointed
out off-list. I read the man page for r.patch before but didn't
understand it. I didn't realize that the tiles I imported were
automatically filled out with -9999 values such that they actually
covered the whole region, and not just that portion of the region that
they have data for. Now that I understand this, r.patch is obviously
what I need, and what I was in fact duplicating with my complicated
GRASS-Emacs-R-Emacs-GRASS translation.

Thanks!

-- 
Regards,

Tyler Smith