I have been trying out the CSS Styling module for GeoServer. Great utility.
but I am struggling with labling a polygon only once at it's centroid when
it overlaps multiple tiles. Below is the SLD to achieve this. How do I call
the centroid() function with CSS?
<Rule>
<TextSymbolizer>
<Geometry>
<ogc:Function name="centroid">
<ogc:PropertyName>geom</ogc:PropertyName>
</ogc:Function>
</Geometry>
<Label>
<ogc:PropertyName>label</ogc:PropertyName>
</Label>
...
<LabelPlacement>
<PointPlacement>
<AnchorPoint>
<AnchorPointX>0.5</AnchorPointX>
<AnchorPointY>0.5</AnchorPointY>
</AnchorPoint>
</PointPlacement>
</LabelPlacement>
</TextSymbolizer>
</Rule>
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