[GRASS-user] integration of sample.c algorithms into r.resample

[Dylan Beaudette]

On Monday 14 August 2006 09:36, Dylan Beaudette wrote:
> On Monday 14 August 2006 08:11, Dylan Beaudette wrote:
> > On 8/14/06, Glynn Clements <glynn at gclements.plus.com> wrote:
> > > Dylan Beaudette wrote:
> > > > How about this:
> > > > 1. keep r.resample and update the documentation accordinly.
> > > > 2. toss r.bilinear, possibly leave a note somewhere in the docs
> > >
> > > Or replace it with a script which calls "r.interpolate
> > > method=bilinear".
> > >
> > > > 3. create a new module 'r.resample.3' (?) for the three methods that
> > > > it would do? or 'r.interpolate' (?)
> > >
> > > I prefer r.interpolate.
> >
> > This works for me.
> >
> > > > Note: the r.interpolate name would make sense for moving from larger
> > > > to smaller grid spacing ( 100m -> 10m), however it wouldn't make as
> > > > much sense for moving from smaller to larger grid spacing (10m ->
> > > > 100m).
> > >
> > > Even in that case, it will normally still perform interpolation. The
> > > only case where no interpolation occurs is when the new resolution is
> > > an exact multiple of the old resolution and the alignment is correct.
> >
> > I am working up a test case for this, cobbling together an
> > 'r.interpolate' via a series of commands to show the differences to
> > r.resample.
>
> ooops, this should have said 'cobbling together a 'r.aggregate' module.

Here is the link to the simple experiment between r.resample and an 
aggrigation solution when converting from small to large cell sizes:

http://casoilresource.lawr.ucdavis.edu/drupal/node/275



-- 
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341