[GRASS-user] Multiple, adjacent raster maps was (Re: Resample DEM to larger cells)

[Rich Shepard]

On Tue, 1 Oct 2019, Rich Shepard wrote:

> However, I have a question (for anyone to answer) about working with this
> basin topography.
>
> There are 70 individual raster maps within the mask of the basin's watershed
> boundary. Am I correct that speed-issues aside, I need to run r.buildvrt so
> I have a single map as input to modules such as r.info (to identify the
> highest elevation), r.slope, and others? While I understand that a mask
> limits analyses to its area that is based on a single map extending beyond
> the mask and not a collection of 70 'tiles'. Am I correct?

No, I'm not correct. I had thought r.patch only filled holes in one raster
map with values from a second raster map. Re-reading the manual page I
learned that when there are no holes it will glue adjacent maps together to
form one large one.

Regards,

Rich