Can you provide a bit more detail about the visual effect you are hoping to
achieve by unioning? That would help in determining what the possible
alternatives might be.
If your datasource supports it you might be able to do this in a SQLView
(e.g. in PostGIS using ST_Union).
On Sun, Nov 25, 2012 at 3:06 AM, Ákos Maróy <[email protected]> wrote:
> Hi,
>
> I wonder if there is a 'group by'-style filter in SLD?
>
> What I'd like to do is to create a union of a number of inter-related
> geometries, and render the union of them. one way to go at it would be
> to be able to group the geometries by one of their properties, which
> would have the same value for the geometries in the same group. then I
> could apply a union function on such a group of geometries.
>
> Is there something similar available in SLD?
>
> Best regards,
>
>
> Akos
>
>
>
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