[GRASS-dev] Re: [GRASSGUI] Adding a Raster Group as layer
michael.barton at asu.edu
Wed May 23 17:06:07 CEST 2007
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).
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).
> 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
>> 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 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
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