I had gone through
https://docs.geoserver.org/stable/en/user/styling/sld/extensions/rendering-transform.html#contour-extraction
Unfortunately below transformation with COUNT and SUM never works. It only
works with MIN and MAX function.
Is there any resolution ? my aim is to get count, by grouping few
attributes and to have colored marker based on count value.
example
- count < 100 red color
- count > 100 and count < 1000 green
- count > 1000
<Transformation>
<ogc:Function name="vec:GroupCandidateSelection">
<ogc:Function name="parameter">
<ogc:Literal>data</ogc:Literal>
</ogc:Function>
<ogc:Function name="parameter">
<ogc:Literal>operationAttribute</ogc:Literal>
<ogc:Literal>st:numericAttribute</ogc:Literal>
</ogc:Function>
<ogc:Function name="parameter">
<ogc:Literal>aggregation</ogc:Literal>
<ogc:Literal>COUNT</ogc:Literal>
</ogc:Function>
<ogc:Function name="parameter">
<ogc:Literal>groupingAttributes</ogc:Literal>
<ogc:Literal>st:inferredAttribute</ogc:Literal>
<ogc:Literal>st:inferredAttribute2</ogc:Literal>
</ogc:Function>
</ogc:Function>
</Transformation>
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