[GRASS-dev] r.in.gdal to group automatically imported multi-bands image

Hello list,

When dealing with multi-band satellite data, it is generally easier to
group them, and generally we import this data from, say a GeoTiff that
is already a multi-band.

Could we consider trying to make a group directly on import in
r.in.gdal by the name of the image? Imagine people that deal with
temporal/hyperspectral data, it could be beneficial.

Following this idea, 2 things:
1-GIS.M to load groups directly (i am not familiar to know if this is
already there)
2-Attach a default group display command to choose from greyscale or RGB

I believe this could help some "image processing" people to use GRASS.

Yann

Yann Chemin wrote:

When dealing with multi-band satellite data, it is generally easier to
group them, and generally we import this data from, say a GeoTiff that
is already a multi-band.

Could we consider trying to make a group directly on import in
r.in.gdal by the name of the image? Imagine people that deal with
temporal/hyperspectral data, it could be beneficial.

I was under the impression that r.in.gdal DID do this already (GRASS 6.1
anyway). e.g. r.in.onearth (r.in.wms) creates the group.

Following this idea, 2 things:
1-GIS.M to load groups directly (i am not familiar to know if this is
already there)
2-Attach a default group display command to choose from greyscale or
RGB

I believe this could help some "image processing" people to use GRASS.

d.rgb group=groupname

could work if the was a consistant naming for bands, and the extension
could be predicted.

scan.r
scan.b
scan.c

but "r.in.onearth -l tmband=visual" creates:
satimage.1
satimage.2
satimage.3

for r,g,b?

Hamish

Could it be possible to automatically get the list of images from the
group and take the 3 first bands as RGB, get these into a d.rgb string
and attach that to a display button inside each group by default, or
something similar...?

I do know really, just trying to get some improvement on the usability
feeling for image processing in GRASS GIS...

thanks
yann

On 10/07/06, Hamish <hamish_nospam@yahoo.com> wrote:

Yann Chemin wrote:

> When dealing with multi-band satellite data, it is generally easier to
> group them, and generally we import this data from, say a GeoTiff that
> is already a multi-band.
>
> Could we consider trying to make a group directly on import in
> r.in.gdal by the name of the image? Imagine people that deal with
> temporal/hyperspectral data, it could be beneficial.

I was under the impression that r.in.gdal DID do this already (GRASS 6.1
anyway). e.g. r.in.onearth (r.in.wms) creates the group.

> Following this idea, 2 things:
> 1-GIS.M to load groups directly (i am not familiar to know if this is
> already there)
> 2-Attach a default group display command to choose from greyscale or
> RGB
>
> I believe this could help some "image processing" people to use GRASS.

d.rgb group=groupname

could work if the was a consistant naming for bands, and the extension
could be predicted.

scan.r
scan.b
scan.c

but "r.in.onearth -l tmband=visual" creates:
satimage.1
satimage.2
satimage.3

for r,g,b?

Hamish