Hi, working on the QGIS SLD exported I've found one cool feature based on existing standards, that is, the ability to parametrize SVGs colors, line thicknesses and the like.
The QGIS library of SVGs contains seems to be all black at a first glance, e.g.: https://github.com/qgis/QGIS/blob/master/images/svg/food/food_cafe.svg but looking at the sources you'll find the use of the "param" function, e.g.: https://raw.githubusercontent.com/qgis/QGIS/master/images/svg/food/food_cafe.svg In particular: <path fill="param(fill)" fill-opacity="param(fill-opacity)" stroke="param(outline)" stroke-opacity="param(outline-opacity)" stroke-width="param(outline-width)" ... This comes from an official SVG extension _draft_ found here: https://www.w3.org/TR/SVGParamPrimer/ The QGis UI allows to control said parameters and get out a colored symbol, all in all similar to our mark support (which QGis also has, but it's under the "simple symbol" category): [image: Inline image 1] I'm suggesting we implement the same, it adds a significant improvement and would allow to use the extensive SVG symbol set already provided in QGIS. Mind, this is a bit more flexible than marks, in that one could parameterize certain parts and not others, or have two outline colors for two semantically different types of outline, and so on, thus I'm not proposing to go and create a mark factory for it. It is also to be noted that the parametrization of SVGs in QGis has been growing over time, so leveraging the exact same mechanism will make it easier to stay on par. Syntax wise, I have been torn a bit between adding vendor params and using the URL params: https://www.w3.org/TR/SVGParamPrimer/#URLParameters After a bit of thinking, I propose to use URL params, as they are local to the symbol, while vendor params are currently at the symbolizer level, too far up in the containment hierarchy (a complex symbol could contain more than one SVG reference), adding them to Graphic would be possible, but also an API break. Of course, I would then modify the QGis export to use the params so that style exports preserve the graphics characteristics chosen. Cheers Andrea -- == GeoServer Professional Services from the experts! Visit http://goo.gl/it488V for more information. == Ing. Andrea Aime @geowolf Technical Lead GeoSolutions S.A.S. Via di Montramito 3/A 55054 Massarosa (LU) phone: +39 0584 962313 fax: +39 0584 1660272 mob: +39 339 8844549 http://www.geo-solutions.it http://twitter.com/geosolutions_it *AVVERTENZE AI SENSI DEL D.Lgs. 196/2003* Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003. The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc. -------------------------------------------------------
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