[GRASS-user] Problems Running r.flow

[Markus Neteler]

On Thu, Jan 28, 2010 at 2:46 AM, Rich Shepard <rshepard at appl-ecosys.com> wrote:
> On Thu, 28 Jan 2010, Markus Neteler wrote:
>
>> If you add -a to g.region, you obtain the desired resolution by
>> (automatically) a slightly enlarged region which make the pixels fit into
>> it properly.
>
> Markus,
>
>  Thank you. I'm still learning about the -a option and when to use it.
>
>  Perhaps this is why some output maps fail.

You have to set to the raster map first. If that has been generated without -a
then perhaps consider to re-do it. I personally dislike odd resolution values
like 4.99982001 which may introduce artifacts later (so, I am g.region -p
maniac to always keep an eye on these things).

Markus