[Mapserver-users] raster legend

[Frank Warmerdam]

Matt Doggett wrote:
> Has anyone successfully rendered a legend for the classes in a raster
> layer?
> 
>  As an example, I have a GRASS raster that contains a small number of
> cell values (e.g. 0=none, 1=few, 2=many, 3=much, etc.) rendered from
> GDAL and it displays in colors from red to green. But for the legend
> icon there is just a blank white box. What I'd like is a colored box for
> each category in the raster.

Matt,

I think you will need to define a CLASS by hand for each value you want to
appear in the legend.  Were you hoping it would be automatically initialized
from the color table (and perhaps class names?) available in GRASS?  I could
in theory implement a kind of "AUTO" class generation for raster sources that
have color tables *and* class names but that doesn't exist at this time.

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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