[GRASS5] r.rescale range question
Andreas.Lange at Rhein-Main.de
Fri Nov 9 10:43:29 EST 2001
Markus Neteler schrieb:
> On Fri, Nov 09, 2001 at 02:39:36PM +0000, Glynn Clements wrote:
> > Markus Neteler wrote:
> > > while looking at r.rescale I found
> > >
> > > r.rescale [-q] input=name [from=min,max] output=name [to=min,max]
> > > [title="phrase"]
> > >
> > > [...]
> > > to The output data range
> > > default: 1,255
> > >
> > > This range looks a bit unusual. Shouldn't it be 8bit = 0..255?
> > I would guess that it's a leftover from when zero was null.
> > Personally, I would suggest just making the "to" option mandatory. I
> > can't see why 255 is any more suitable as a default than any other
> > value.
> Thanks for all suggestions. I have updated module and html page
> making the "to" option mandatory.
But that is only true if we do not implement the -z flag which changes
to zero (0) for null values.
Please look in the RT and my other mails on the problems with r.reclass.
I am lost with the problem in r.reclass somehow. Would appreciate any
help with that.
Andreas Lange, 65187 Wiesbaden, Germany, Tel. +49 611 807850
mail: Andreas.Lange_at_Rhein-Main.de - A.C.Lange_at_GMX.net
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