Hi Andrea,
Yep, Displacement of the fill symbol itself.
It's useful for when you have multiple symbols for a polygon fill - the
Ordnance Survey use them for their MasterMap Product when a vegetation area
has lots of types of vegetation - it mixes the symbols together to depict
the type of vegetation visually.
Look at the light green areas here for a fairly bad example (top left and
bottom right):
http://hub.qgis.org/attachments/4788/example4.png

Regards,
Jonathan


On 10 January 2013 11:32, Andrea Aime <andrea.a...@geo-solutions.it> wrote:

> On Wed, Jan 9, 2013 at 7:28 PM, Jonathan Moules <
> jonathanmou...@warwickshire.gov.uk> wrote:
>
>> Following my other thread with CSSParameter and SVGParameter and the
>> revelation there's a SVG 1.0 and 1.1, I've discovered this issue is caused
>> because the stylesheet is 1.1.0, and apparently GeoServer can't handle
>> external SVG fills with that version yet.
>>
>> I converted it to 1.0.0 and it now mostly works, but there's one problem:
>> One of the key elements I was using was "<Displacement>", which allows
>> you to offset a fill by a specified number of pixels, but this doesn't
>> appear to be in 1.0.0. Is there any way around this or is it simply a case
>> of waiting for that aspect of SLD 1.1 to be implemented into GeoServer?
>>
>
> Hmm... displacement of the fill? Not of the polygon that's to be filled?
>
> Cheers
> Andrea
>
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