[GRASS-user] r.denoise segfaults on a raster of 1166468401 cells

GRASS GRASS user
1

2012/12/21 <grass-user-request@lists.osgeo.org>

Hi Nikos. In my experience, utility works well with raster sizes
no more than 2000x2000 (regardless of RAM size). That’s why the only way to
denoise the large rasters ? using of tiles and patching of final results.

Of course! Yet, what about differently smoothed tile borders? Any additional
hints?

In my work, patching smoothed tiles (separate rasters) not cause any serious distortions in result raster. Anyway, it needs some more investigations :slight_smile:

Best regards,
Alexander.

2

Alexander Muriy:

> > Hi Nikos. In my experience, <mdenoise> utility works well with raster
> > sizes no more than 2000x2000 (regardless of RAM size). That's why the
> > only way to denoise the large rasters ? using of tiles and patching of
> > final results.

Nikos:

> Of course! Yet, what about differently smoothed tile borders? Any
> additional hints?

Alex:

In my work, patching smoothed tiles (separate rasters) not cause any
serious distortions in result raster. Anyway, it needs some more
investigations :slight_smile:

Thanks, this is, I guess, a meaningful piece of info. As you state, however,
further investigation would probably make sense.

Nikos