Hi Andrea, I'm now dabbling with the SLD Vendor Option - "graphic-margin" and have encountered an issue; before I file a JIRA for it as a bug I wanted to confirm if it's desired or unintended.
My graphic-fills are SVG symbols of different sizes.
My SLD is:
<se:PolygonSymbolizer>
<se:Fill>
<se:GraphicFill>
<se:Graphic>
<se:ExternalGraphic>
<se:OnlineResource xlink:type="simple" xlink:href=
"file:///d:/GeoServer_Symbology/OSMM_SVG_symbols/smallConiferousTreeFillSymbol.svg"
/>
<se:Format>image/svg+xml</se:Format>
</se:ExternalGraphic>
*<se:Size>16</se:Size>*
</se:Graphic>
</se:GraphicFill>
</se:Fill>
*<se:VendorOption name="graphic-margin">15</se:VendorOption>*
</se:PolygonSymbolizer>
<se:PolygonSymbolizer>
<se:Fill>
<se:GraphicFill>
<se:Graphic>
<se:ExternalGraphic>
<se:OnlineResource xlink:type="simple" xlink:href=
"file:///d:/GeoServer_Symbology/OSMM_SVG_symbols/scrubFillSymbol.svg"/>
<se:Format>image/svg+xml</se:Format>
</se:ExternalGraphic>
*<se:Size>16</se:Size>*
</se:Graphic>
</se:GraphicFill>
</se:Fill>
*<se:VendorOption name="graphic-margin">15</se:VendorOption>*
</se:PolygonSymbolizer>
As you can see I'm using the same numbers for both items; However the
output is:
[image: Inline images 4]
The scrub pattern isn't neatly gridded on the X axis because the scrub SVG
isn't as wide as the tree.
I know it's possible to set specific margins, but that doesn't help. For
instance, if I change the scrub line to:
<se:VendorOption name="graphic-margin">*17 15*</se:VendorOption>
That gives:
[image: Inline images 5]
The Y is still correct, but the X is too short.
But if I increase the X to 18, it becomes too long:
[image: Inline images 6]
This seems to make it impossible to actually pattern multiple fills
together neatly.
Am I doing something wrong or is this a bug?
====
Couple of other observations:
(b) - The doc says: "top-bottom,right-left (two values, top and bottom
sharing the same value)", but as you can see above, it seems to actually be
right-left, top-bottom. I've not tried the three and four values to see if
they agree with the docs.
(c) - Using a single symbol, size 16, with a pattern of "5 17", I get this:
[image: Inline images 8]
As you can see, it's cutting off the tree - should it do that? I thought it
was just adding whitespace around it before drawing the next tree. If I
change it to "5 25", then the tree disappears altogether!
Any thoughts on these issues?
Cheers,
Jonathan
On 23 August 2013 15:55, Andrea Aime <[email protected]> wrote:
> On Fri, Aug 23, 2013 at 4:51 PM, Jonathan Moules <
> [email protected]> wrote:
>
>> Thanks. We're using 2.3.5 so should be fine.
>> Is there any documentation on it? I can't seem to find anything.
>>
>
>
> http://docs.geoserver.org/stable/en/user/styling/sld-extensions/margins.html
>
> Cheers
> Andrea
>
> --
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