Hi René,
I'm just asking questions to fully understand the use case. Thank you
for your feedback. You mentioned an interesting point.
As you mentioned, the solution can be based on the server side if the
map server accepts an SLD.
This approach can not be used against WMS services working behind
caches/tiling services providing only predefined styles.
Regards,
Jorge Gustavo
On 26/10/21 12:43, René-Luc Dhont wrote:
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
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Frederiksberggade 19, 2nd Floor
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Tlf: +45 5114 6444
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Jorge Gustavo Rocha
Departamento de Informática
Universidade do Minho
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