Tobias Spaltenberger ha scritto:
> Hi Andrea,
> 
> while googling on how to make polygon fills with hatching, I found
> your mail and the following page:
> http://jira.codehaus.org/browse/GEOT-829.
> 
> I was able to create hatched polygons using Geoserver 1.6.3 and the
> following SLD snippet:
> 
> <sld:PolygonSymbolizer>
>       <sld:Fill>
>               <sld:GraphicFill>
>                       <sld:Graphic>
>                               <sld:Mark>
>                                       
> <sld:WellKnownName>hatch</sld:WellKnownName>
>                                       <sld:Fill>
>                                               <sld:CssParameter 
> name="fill">#00FF00</sld:CssParameter>
>                                       </sld:Fill>
>                               </sld:Mark>
>                       </sld:Graphic>
>               </sld:GraphicFill>
>       </sld:Fill>
>       <sld:Stroke>
>               <sld:CssParameter name="Stroke">#000000</sld:CssParameter>
>               <sld:CssParameter name="Stroke-width">1</sld:CssParameter>
>       </sld:Stroke>
> </sld:PolygonSymbolizer>
> 
> I haven't found out how to change stroke width and spacing (and
> rotation other than multiples of 45 degrees) of the hatching, I don't
> know if that is possible with this Mark...

Yeah, it's not. I have prepared an infrastructure that allows developers
to add new mark and external graphics as well make dynamic ones, but
unfortunately that work was not sponsored and I had to stop it mid
flight to attend to paid work.

I looked a bit into supporting AutoCad hatches, but it does not seem to
be easy at all, unfortunately. The thing is, I wanted to leverage some
already existing hatch pattern library, and the only ones I've found are
the AutoCad ones.

If you're a developer and would like to contribute some extra well
known marks, eventually dynamic ones, have a look at this proposal:
http://docs.codehaus.org/display/GEOTOOLS/Dynamic+SLD+Graphic+objects
I managed to get the infrastructure in, and to add support for TTF
font based markers, but got no luck so far with hatches.
Maybe you can code up some?

Cheers
Andrea

-- 
Andrea Aime
OpenGeo - http://opengeo.org
Expert service straight from the developers.

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