[QGIS-Developer] applying an SLD to a WMS layer

[René-Luc Dhont]

Hi Jorge,

WMS Server can process SLD  provide in a GetMap Request.
QGIS Server is able to apply an SLD to a layer and provide the resulting 
image. The SLD can be provided through the SLD_BODY parameter or the  
SLD parameter for linked file.
https://docs.qgis.org/3.16/en/docs/server_manual/services.html#qgisserver-wms-getmap
This capability is mainly exploited by web clients

René-Luc

Le 26/10/2021 à 12:26, Jorge Gustavo Rocha a écrit :
> Hi Kurt,
>
> By design, WMS GetMap requests returns images. Those are rendered on 
> the server side, by the map server. Many services just provide those 
> rendered images.
>
> Are you trying to provide advanced image processing capabilities on 
> the client side to apply an SLD on top those images?
>
> Or would you like to try other GetMap formats, more friendly to 
> process on the client side? Like svg or kml? Some of these formats are 
> available as vendor options of the map server.
>
> Regards,
>
> Jorge Gustavo
>
>
> On 26/10/21 10:58, Kurt Menke wrote:
>> Hello,
>> We have been developing web apps that allow the user to download the 
>> selected extent and data layers as a QGIS project file. Many of the 
>> layers are hosted by the government as WMS services. We are wondering 
>> if anyone has looked into the possibility of applying an SLD style to 
>> a WMS layer in QGIS. We were hoping to be able to edit the *.qgs file 
>> programmatically. We would be interested in sponsoring the effort 
>> depending on the level of effort required, assuming it is even possible.
>> Best,
>> Kurt
>>
>> -- 
>>
>> Kurt Menke
>>
>> GIS-Consultant
>> --------------------------
>> Septima P/S
>> Frederiksberggade 19, 2nd Floor
>> 1459 Copenhagen
>>
>> Tlf: +45 5114 6444
>>
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>
> J. Gustavo

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