Op 09-04-2021 om 14:20 schreef Erik Böhm:
Dear list,
as it is pretty convinient, we are using QGIS to style our layers and
export the SLD to be used in GeoServer. This works fine in pretty simple
cases.
Right now we try to use the standard "Dense"-Symbologie from QGIS,
overlaying a polygon with a hatch of points. This is represented in the
SLD as <se:WellKnownName>brush://dense6</se:WellKnownName> or
<WellKnownName>dense6</WellKnownName>, depending on which type of SLD
you use.
When using the SLD in GeoServer, the style works, as the polygons get
coloured in the way they should, but the hatch of points is not rendered.
The SLD has no validation error and the GeoServer Log shows no error either.
We figured out, that the 'brush'-symbol libary is not available on
GeoServer, and therefore the <WellKnownName> is not rendered.
If we are right on this one, is there in general a way to implement the
QGIS symbol libaries on GeoServer?
unfortunately "brush" is not that well known
WellKnownName sybols are coded in factory classes in
https://github.com/geotools/geotools/tree/main/modules/library/render/src/main/java/org/geotools/renderer/style
and hold a limited sets of symbols. I thing you would need to create a
"BrushMarkfactory" that provides for "brush://" and will return the
shape "dense6" when requested.
The known Mark factories are listed in
https://github.com/geotools/geotools/blob/main/modules/library/render/src/main/resources/META-INF/services/org.geotools.renderer.style.MarkFactory
atm I don't think there is any way to use "symbol libraries" without
coding - I have no idea what those look like for qgis;
there are ways around this by modifying your style using eg. an external
graphic for the pattern mark (eg a TTF or SVG symbol) instead
As noted on
https://docs.geoserver.org/latest/en/user/styling/qgis/index.html the
project is interested in improving support for QGIS generated styles,
but it needs funding.
-M
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