[GRASS-dev] [GRASS GIS] #2032: r.mapcalc does not always respect MASK

[Glynn Clements]

Paulo van Breugel wrote:

> The reason I think such a reminder might be helpful is that modules like
> r.neighbors always require an existing map as input and therefore the MASK
> will normally be respected.

"Respected" in the sense that the input will be masked. But
r.neighbors computes the aggregate over the non-null neighbours, so it
will typically write non-null values to some of the cells which are
masked (more specifically, the masked regions will tend to shrink by
the neighbourhood radius).

-- 
Glynn Clements <glynn at gclements.plus.com>