[GRASSLIST:4311] Re: more gdal help!

[Markus Neteler]

On Sun, Aug 18, 2002 at 06:01:49PM +0100, Glynn Clements wrote:
> 
> Markus Neteler wrote:
> 
> > > > I am not sure, of course, what the usefullness of the r.composite tool.  It
> > > > fails to correctly display the image I was shooting for.  I know in other
> > > > programs (manifold) that you use a composite type function to piece together
> > > > the rgb values.
> > > 
> > > The purpose of r.composite was to counter the complaints which arose
> > > when I removed the composite map generation functionality from several
> > > programs (e.g. d.his, r.in.*).
> > > 
> > > Some people seemed to want that functionality, although I still
> > > haven't discovered why.
> > 
> > ... eg. to put RGB composed images onto the web:
> > MODIS/TERRA remote sensing
> > http://mpa.itc.it/rs/
> > (work in progress)
> 
> If you just want colour images, use r.out.ppm3 then convert the PPM to
> your preferred image format with an image processing tool. 
Yes, a possible way. But when I want to overlay some other maps (vector)
I need it within GRASS. OK, there is the PNG driver...
But to drape it over DTM (NVIZ) you really need the composite inside
GRASS.


Markus