2009/1/22 Andrea Aime <aa...@opengeo.org>:
> Yet, not all hope is lost. The fill color can take pretty much
> any expression inside of it, so it can also take a filter
> function. Filter functions are pluggable, so you can write
> a custom one, register it in the GeoTools SPI (the plugin
> mechanism GeoTools and JAI use), and use it in your SLD.

Thanks very much Andrea - that sounds like it could be a very flexible
approach, much better than I was hoping for in fact !

Michael

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