[GRASS-user] g.region question

[Nikos Alexandris]

Annekatrien:
> I have a simple question on the g.region module in Grass GIS. How does
> it work when you change the resolution of the current region? For
> example, I have with Landsat images with a 30 m resolution, but I'm
> doing the analysis at a resolution of 1 km. So are the pixel values
> aggregated in some kind of way? Or is for instance only the value of
> the middle cell selected? It might be a stupid question, but I can't
> seem to find the answer anywhere.

Hi Annekatrien!

As far as I understand, your raster maps will be resampled to 1000m
using the (default?) nearest neighbor method.

Indeed, the only direct reference to this in g.region's manual is the
sentence "Raster data will be resampled, if necessary, to meet the cell
resolutions of the current geographic region setting." without any
reference about the resampling method.

Maybe update the manual (given it's the way I thought it is all this
time using g.region).

Kind regards, Nikos