Hi All,
I'm trying to use variable substitution in the SLD to allow the user to
pick which band to display from the raster.
My SLD Looks like this:
<RasterSymbolizer>
<Opacity>0.35</Opacity>
<ChannelSelection>
<GrayChannel>
<SourceChannelName>
<ogc:Function name="env">
<ogc:Literal>band</ogc:Literal>
<ogc:Literal>25</ogc:Literal>
</ogc:Function>
</SourceChannelName>
</GrayChannel>
</ChannelSelection>
....
I'm passing the proper query parameter:
&env=band:20
But I get the following error from geoserver:
Error rendering coverage on the fast path
java.lang.IllegalArgumentException: Band number -1 is not valid.
Band number -1 is not valid.
For input string: "channel"
So I take it that "function name="env"" doesn't work here as it's
returning -1 or nothing at all?
Blake
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