We are using a UTM based grid square to visualize some generalized data. The 
produced map tiles are presented with a white line in between the objects.


*         http://twitpic.com/98ib8r

Even the sample provided in the SLD cookbook seems to have this issue:


*         
http://docs.geoserver.org/stable/en/user/styling/sld-cookbook/polygons.html#simple-polygon

We would rather that we had no lines in between the polygons. The styling gives 
us a rather annoying moire pattern when we zoom out (the extent is big ocean 
areas). I tried fixing this using stroke in this manner:

<PolygonSymbolizer>
             <Fill>
                <CssParameter name="fill">#f09e9c</CssParameter>
                <CssParameter name="fill-opacity">0.7</CssParameter>
             </Fill>
            <Stroke>
              <CssParameter name="stroke">#f09e9c</CssParameter>
              <CssParameter name="stroke-width">1</CssParameter>
              <CssParameter name="stroke-opacity">0.1</CssParameter>
            </Stroke>
</PolygonSymbolizer>

It still does not help much since the opacity is additive and in the end of the 
day it gives us lines in a different colour. I am wondering if this is a bug or 
a feature.

In any case I'm stuck with this thin lines. Any ideas for solving it?


Cheers!

Ragnvald
Senior Engineer, Environmental data section
            Tlf:       +47 73 58 05 64
            Mob:    +47 92 42 15 40
The Norwegian Directorate for Nature Management
www.dirnat.no<http://www.dirnat.no>

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