[GRASS-user] the performance of displaying vector attributes - with MySQL no difference!!

[Jarek Jasiewicz]

> Hi again,
> the problem of my database is that I don't see any way to optimize it.
> Imagine if you have 20 thousands of xyz points and want just to
> visualize them in different colors (dem-like color scale). Each point
> has its unique x,y,z values...
> I tried to assign indexes for my "z" column using:
>  
> 	ALTER TABLE my_points ADD INDEX(z_ccordinate);
>
> And I don't see any difference in performance with e.g. v.univar.sh 
> So maybe I am doing something wrong?
>
> Cheers
>
> Zbigniew
>
>  
>
>
> _______________________________________________
> grassuser mailing list
> grassuser at grass.itc.it
> http://grass.itc.it/mailman/listinfo/grassuser
>   
If I understood well from the previous post threre is a RGB column it is 
indexed? how much categories of rgb colors you have. If you have as many 
categories as values this is the problem. In grass, graphical engine 
must assing color and render every pixel individualy

regards
J