Using WMS server parameter SLD

Question

I have an issue with using the parameter SLD in GetMap when using the WMS service via the geoserver's API. When passing a style into the parameters of a GET call to a WMS layer using the STYLES parameter I get the desired result. However, when I copy and paste the sld code into a file on GitHub and use the SLD parameter accordingly, everything is grey.

Any idea?

Geoserver version: 2.19.1

Using parameter styles

Using parameter SLD

Answer 1

Your SLD on GitHub has:

<sld:NamedLayer>
    <sld:Name>CH001L2_ZURICH_UA2018</sld:Name>

The SLD schema (http://schemas.opengis.net/sld/1.0.0/StyledLayerDescriptor.xsd) tells us that:

<xsd:element name="NamedLayer">
    <xsd:annotation>
        <xsd:documentation>
    A NamedLayer is a layer of data that has a name advertised by a WMS.
  </xsd:documentation> 

But the WMS has no layer called CH001L2_ZURICH_UA2018 only layers eea-urban-atlas_DE002L1_HAMBURG_UA2018 and eea-urban-atlas_SI001L2_LJUBLJANA_UA2018

So the SLD is not applied, and you get the default.