On Mon, Jan 7, 2013 at 6:57 PM, Martin Davis <mda...@opengeo.org> wrote:
> I don't think this is possible at the moment. The problem is that the
> quantity value is supplied by an attribute, rather than a sub-element
> (where it would be possible to allow a filter expression instead of a fixed
> value.
>
> The ColorMapEntry element is actually a bit of an anomaly in SLD - most
> parameters in other styling elements are supplied as element content,
> rather than attributes. A nice extension for GeoServer would be to allow
> CQL expressions in attribute values in SLD.
>
Hmm.. let's say the reason for the usage of the attribute is not so
difficult to imagine, rasters have
no "attributes", so theoretically there would be nothing to write an
expression against, standard wise.
GeoServer has the env function though, that one would indeed be usable as a
source of values for
the color map
Cheers
Andrea
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