Hi,
the SLD schema does not allow to specify a function inside the channel
selection, we have extended bits
and pieces in raster symbolizer to work off expressions, but I don't think
channel selection is one that got
worked on, I had a quick pick at the SLD parsing code and it appears to
only work
This is a cross-post from
https://gis.stackexchange.com/questions/278774/variable-substitution-in-sld-for-geoserver-2-13-rastersymbolizer-channelselectio
as I was told that this may be a better place to ask this question:
I'm trying to publish a layer with a style that allows the extended WMS re
