[GRASS-dev] Re: [GRASSGUI] Adding a Raster Group as layer

[Yann]

Yes Michael, that would be nice/useful.

I'd like to start, but my level is so close to NULL in that regard...
Maybe a miracle will make me speak wxPythonic.

Yann


On Wednesday 23 May 2007 22:06, Michael Barton wrote:
> Yann,
>
>
> It sounds like what you are suggesting is to create a GUI module that would
> open a group and use various GRASS commands to do something with
> it--display it, PCA, colors, etc. Kind of a comprehensive imaging module.
> This is a nice idea. Once we have the main functionality done in wxgrass,
> it would be worth considering how to build (or someone else can start on it
> now).
>
> Michael
>
> On 5/23/07 12:04 AM, "Yann" <yann.chemin at gmail.com> wrote:
> > Hello Michael,
> >
> > I cannot confirm now, but some times back i was told so about the
> > automatic creation of a group when importing a multi-band image file with
> > r.in.gdal.
> >
> > But this is not the main issue here, once we do have a group it would be
> > nice to load it and
> > 1-select any layer or any three layers and press display, it could
> > understand load a single layer or a d.rgb triplet.
> > 2-various color enhancements could be synchronized/automatized indeed
> > (i.e. auto: grey all layers in this group, auto: transparency 30% for all
> > layers, auto: r.null setnull value=0 for all layers, ...).
> >
> > there are few other things that can be simplified/synchronized through
> > that menu (pca and other functions that input a large number of files,
> > this could be simplified if they are already selected).
> >
> > Yann
> >
> > On Wednesday 23 May 2007 13:36, you wrote:
> >> Evening Yann,
> >>
> >> On 5/22/07 10:40 PM, "Yann" <yann.chemin at gmail.com> wrote:
> >>> After importing a multispectral image with r.in.gdal, a group is
> >>> created holding all these layers.
> >>
> >> I don't follow you on this. What kind of group? AFAIK, r.in.gdal just
> >> creates a set of separate raster files with identical prefixed names.
> >> Does it build an image group?
> >>
> >>> Could we have a button that would show/select/load any existing group
> >>> in the GUI (it could have a tree inside for all the bands available).
> >>>
> >>> Once loaded we could select one or any combination of 3 bands for
> >>> display.
> >>
> >> Putting the maps in separate layers would simply overlay one on top of
> >> the other, not recombine them into an RGB image again. This would have
> >> to take place within d.rgb.
> >>
> >> Following your idea, an enhanced d.rgb would be able to load a group, in
> >> addtion to just any individual layer, making layer selection more
> >> convenient for bands of a multiband image. I'd add that it should also
> >> have a couple of options for doing automatic equalization stretches
> >> (linear, log, and gaussian if I want to imagine a really nice module) on
> >> the bands before it displays them.
> >>
> >> Michael
> >>
> >> __________________________________________
> >> Michael Barton, Professor of Anthropology
> >> School of Human Evolution & Social Change
> >> Center for Social Dynamics & Complexity
> >> Arizona State University
> >>
> >> phone: 480-965-6213
> >> fax: 480-965-7671
> >> www: http://www.public.asu.edu/~cmbarton
>
> __________________________________________
> Michael Barton, Professor of Anthropology
> School of Human Evolution & Social Change
> Center for Social Dynamics & Complexity
> Arizona State University
>
> phone: 480-965-6213
> fax: 480-965-7671
> www: http://www.public.asu.edu/~cmbarton

-- 
Yann Chemin
Sainte-Anne d'Auray, France