[Qgis-user] Raster Color Map

[Goyo]

El mié, 02-09-2009 a las 18:13 +0200, Agustin Lobo escribió:
> Goyo wrote:
> > El mié, 02-09-2009 a las 10:55 +0200, Agustin Lobo escribió:
> >   
> >> Hi!
> >>
> >> (using 2.1.0 on ubuntu jaunty)
> >>
> >> I'm confused by the Colormap tab in Raster Properties: no matter
> >> which extreme colors  and options  I select, when I select
> >> Classify always get the same color ramp. My understanding was
> >> that if I were selecting i.e. white for 0 and black for 255, and 10 classes
> >> I would get a greyscale. In other words, that the colors
> >> entered by the user would guide the interpolation and the
> >> final color table. Am I doing something wrong?
> >>
> >> Agus
> >>     
> >
> > You can add just two entries (or more) for black and white (or whatever)
> > and then select linear interpolation. 
> That's what I'm doing, but at some point you must click on Classify
> for any action to take place, and then you get a blue to red
> color ramp whatever you have entered.
> In your case, after selecting Linear interpolation, which button
> are you clicking? Actually, I recall being able to do what
> you say with previous versions, but was too long ago.
> (I'm using unstable 1.2.0 on ubuntu jaunty now)
> 
> Agus

*Do not* press Classify if you do not want the standard blue-to-red ramp
again. Just provide some values and colors, select linear interpolation
and click Apply or OK. Every pixel is given an interpolated color based
on the values and colors you provided in the colormap.

Goyo

> > That's not exactly the same, you
> > don't get 10 clases but a continuous ramp. That's the way I do it with
> > DEMs, for example, using three or four colors.
> >
> > Goyo
> >
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> >
> >   
>