On Wed, Mar 30, 2011 at 7:13 PM, Gis Mage <[email protected]> wrote: > 1. White line in the middle won't do - the symbol has to be hollow in the > middle.
Then try hollow symbol + graphic symbolizer + dash array There are some examples using markers in my FOSS4G 2011 presentation here: http://2010.foss4g.org/presentations/3588.pdf though in your case you will probably want to use a transparent png as the symbol. The tool to do what you want the right way is.... guess what? Perpendicular line computation, the same you need for curved labels at a distance from the line. I looked at existing open source implementation and they all fail spectacularly in some case or ther other, generating loops or very long spikes when the curve turns sharply or there are segments shorter than the offset distance (not hard to get either, just zoom out and almost every line will become very badly behaved). > 2. That's very very sad. Maybe there is a workaround with geometry > functions? > There is a "drop shadow" example where geometry is offset from the original. > So can I just offset a river and put a TextSymbolizer with followline in it? It will never be really perpendicular, it may be perpendicular on the "main direction" of the river but at the first turn it will stop being so. Geometry functions just apply some geometry math: the single side buffer, aka perpendicular line, is something we just don't have. 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: +39 333 8128928 http://www.geo-solutions.it http://geo-solutions.blogspot.com/ http://www.youtube.com/user/GeoSolutionsIT http://www.linkedin.com/in/andreaaime http://twitter.com/geowolf ------------------------------------------------------- ------------------------------------------------------------------------------ Create and publish websites with WebMatrix Use the most popular FREE web apps or write code yourself; WebMatrix provides all the features you need to develop and publish your website. http://p.sf.net/sfu/ms-webmatrix-sf _______________________________________________ Geoserver-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geoserver-users
