Yes, the elusive offset line would be required if that's the technique
used.
One way to do this geometrically would be to construct a series of
perpendicular lines segments with the specified side, length, and spacing.
Then delete all segments which intersect another one or the original line.
The result will be a geometry that could be style to appear like hashes.
On Thu, Jul 12, 2012 at 9:19 AM, Andrea Aime
<[email protected]>wrote:
> On Thu, Jul 12, 2012 at 6:00 PM, Martin Davis <[email protected]> wrote:
>
>> Nice! Can you post the SLD that creates this effect?
>>
>> Buffer does work with lines, but I'm guessing that the generated buffers
>> won't work with your technique, since the buffer is generated on both sides
>> of the line. JTS does have the capability to generate "single-sided
>> buffers", but this isn't currently exposed in GeoServer. You'd have to
>> write a new function to do that.
>>
>
> And that would not work properly either. I believe what he did was to
> buffer with a negative size to get a smaller
> polygon whose border was then painted with a graphic stroke.
>
> But to get the same effect with lines, and a proper one, one would need a
> "offset line", which is not a single
> side buffer (as already discussed many times)
>
> Cheers
> Andrea
>
> --
> Ing. Andrea Aime
> GeoSolutions S.A.S.
> Tech lead
>
> Via Poggio alle Viti 1187
> 55054 Massarosa (LU)
> Italy
>
> phone: +39 0584 962313
> fax: +39 0584 962313
> mob: +39 339 8844549
>
> http://www.geo-solutions.it
> http://geo-solutions.blogspot.com/
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> http://www.linkedin.com/in/andreaaime
> http://twitter.com/geowolf
>
>
--
Martin Davis
OpenGeo - http://opengeo.org
Expert service straight from the developers.
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