Hi,

GetSyles is unfortunately not supported for raster layers. See the 
msSLDGenerateSLDLayer function at 
https://github.com/MapServer/MapServer/blob/25ef061bec310773511eb84ef03f4a91e0f5a081/src/mapogcsld.cpp#L4601
Code would need to be written to create a ColorMap SLD file similar to:

<se:Rule>
<se:RasterSymbolizer>
<se:Opacity>1.0</se:Opacity>
<ColorMap>
<ColorMapEntry color='#00FF00' quantity='3'/>
</ColorMap>
</se:RasterSymbolizer>
</se:Rule>

SLD can however be applied to a RASTER LAYER. 

Seth

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On Thu, May 8, 2025, at 2:59 PM, Trygve Aspenes via MapServer-users wrote:
> Thanks Jukka!
>
> It at least shows me it is possible. Is there a way for me to see how 
> the Layer Mapfile is looking for this continents layer? It might help me 
> tracking down what I'm doing wrong.
>
> Trygve Aspenes
>
> Den 2025-05-08 13:46, skrev Rahkonen Jukka:
>> Hi,
>> 
>> I cannot say what makes trouble for you, but like this it should work:
>> 
>> https://demo.mapserver.org/cgi-bin/wms?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetStyles&layers=continents
>> 
>> -Jukka Rahkonen-
>> 
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