Colours from categories

[Malcolm Williamson]

I'll tackle problems 2 & 3, leave the colors to someone else!

(lines deleted)
> 
> Second problem: the elevation map has no value labels for the categories. I
> know I can add these one-by-one using r.support or r.reclass, but is there a 
> faster way of doing it? ie, I want to compute the label as a function of the
> category number.
> 
You need to write a clever little shell scripts to read each line of your cats
file and create a label entry based on the attribute value. awk might be the
tool of choice for this. (REAL Grass users are shell programmers in disguise -
just kidding!!) At least you would be able to use this in the future.

> The man pages also talk about a green thru brown thru yellow colourtable for
> elevation maps. Is this some sort of cartographers' standard? I was under the 
> impression that the literature in fact recommends grey scale as being easiest
> to interpret.
> 

Don't know the cartographer's answer, but the human eye is much more adept at
distinguishing colors than gray shades. Green thru brown seems to be frequently
used on globes, etc.

> -- 
> Conn V Copas
> Loughborough University of Technology          tel : +44 (0)509 222689
> Computer-Human Interaction Research Centre     fax : +44 (0)509 610815      
> Leicestershire  LE11 3TU              e-mail - (Janet):C.V.Copas at uk.ac.lut   
> G Britain                                      (Internet):C.V.Copas at lut.ac.uk
> 
> 


-- 
Malcolm D. Williamson - Research Assistant       E-mail: malcolm at cast.uark.edu
Center for Advanced Spatial Technologies      Telephone: (501) 575-6159
Ozark Rm. 12                                        Fax: (501) 575-3846 
University of Arkansas              
Fayetteville, AR 72701