[GRASS5] testing GRASS5.0.0pre1

[Markus Neteler]

On Fri, Apr 20, 2001 at 10:07:51AM -0400, mberglund wrote:
[...]
> But in the patch I had a 830KB cat file! The color file was also large.
Mhhh, the color/cat patch seems to be poor in r.patch (therefore we
have i.image.mosaik as a workaround). It should become better once...

> > Perhaps above test should be extended with some r.colors stuff to assign
> > more colors (to get a larger color table). Note: It is well known that
> > GRASS becomes *very* slow with more than 8000 entries in color table.
> 
> Is grass also slow to create the colors? And does it stand to reason that
> a larger number of categories implys a larger color palete.
I guess it is a color sort problem or so.

Have a look here on former threads:
http://www.geog.uni-hannover.de/mailinglisten/grass5/archive/2001/3/24/2
http://www.geog.uni-hannover.de/mailinglisten/grass5/archive/2001/3/9/11
http://www.geog.uni-hannover.de/cgi-bin/minorweb.pl?A=READ&L=grass5/2001/3/8/24
http://www.geog.uni-hannover.de/cgi-bin/minorweb.pl?A=READ&L=grass5/2001/3/9/4

If you look at r.in.tiff you will see some logic to reduce colors.

Maybe you can dig into all this?

Thanks,

 Markus

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