[Qgis-user] QGIS Server - GetLegendGraphics request confusion

[Jakob Miksch]

Hi,
thanks for your responses. I was relying on the LTR docs before.
I also noticed that GetLegendGraphic also accepts the parameter LAYER (singular) and not only LAYERS (plural), but this was not documented. I opened a PR for this: server: add "LAYER" to allowed parameters for GetLegendGraphic by JakobMiksch · Pull Request #8561 · qgis/QGIS-Documentation (github.com)<https://github.com/qgis/QGIS-Documentation/pull/8561/files>

The usage of LAYERS (plural) in QGIS Server also confused me, since GeoServer, MapServer and so on use the parameter LAYER (singular).

Best regards,
Jakob

Jakob Miksch
Consultant

+49 170 9036956
siticom.online


Von: Etienne Trimaille <etienne.trimaille at gmail.com>
Gesendet: Dienstag, 17. Oktober 2023 10:07
An: Alessandro Pasotti <apasotti at gmail.com>
Cc: Jakob Miksch <jakob.miksch at siticom.de>; qgis-user at lists.osgeo.org
Betreff: Re: [Qgis-user] QGIS Server - GetLegendGraphics request confusion



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Hi,
The documentation was updated a few months ago to follow the OGC specifications.
https://docs.qgis.org/3.28/en/docs/server_manual/services/wms.html#getlegendgraphics
versus
https://docs.qgis.org/testing/en/docs/server_manual/services/wms.html#getlegendgraphic


Le mar. 17 oct. 2023 à 09:27, Alessandro Pasotti via QGIS-User <qgis-user at lists.osgeo.org<mailto:qgis-user at lists.osgeo.org>> a écrit :
Hi,

QGIS server actually accepts both requests:

else if ( QSTR_COMPARE( req, "GetLegendGraphic" ) || QSTR_COMPARE( req, "GetLegendGraphics" ) )


On Mon, Oct 16, 2023 at 6:20 PM Jakob Miksch via QGIS-User <qgis-user at lists.osgeo.org<mailto:qgis-user at lists.osgeo.org>> wrote:
Hi everyone!

I have a QGIS Server running. Requesting the legend of a layer works fine as explained in the docs: 3.2. Web Map Service (WMS) — QGIS Documentation documentation<https://docs.qgis.org/3.28/en/docs/server_manual/services/wms.html#getlegendgraphics>
However, I noticed that in QGIS Server the request must be called “GetLegendGraphics” with a trailing “s”, whereas GeoServer (GetLegendGraphic — GeoServer 2.25.x User Manual<https://docs.geoserver.org/latest/en/user/services/wms/get_legend_graphic/index.html>), MapServer (WMS Server — MapServer 8.0.1 documentation<https://mapserver.org/de/ogc/wms_server.html#getlegendgraphic-request>), deegree and OpenLayers (OpenLayers v8.1.0 API - Class: ImageWMS<https://openlayers.org/en/latest/apidoc/module-ol_source_ImageWMS-ImageWMS.html#getLegendUrl>) expect the request to be called “GetLegendGraphic” WITHOUT the trailing “s”.

Is there a reason why QGIS Server provides legends differently compared to other established geospatial software?

Best regards,
Jakob

 [cid:image001.png at 01DA0128.558637B0]

Jakob Miksch
Consultant

+49 170 9036956
siticom.online


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