Hi Andrea The pregenralized feature stuff is intended to reduce calculations at runtime. The idea is comparable to image pyramids.
The concept works well rendering images using WMS in geoserver. But what about clients fetching the vector data and doing the rendering for themselves ?. I can remember a project using a Java applet and doing the same logic, having "pyramids" of vector data and deciding which generalization level to use. The result was a big performance improvement. I did not use WFS, it was a proprietary solution, but the idea was the same. Since I am not involved in the WFS modules, I have no concrete idea, but do you see a possibility to offer this feature for WFS and how to implement it. Cheers Christian Zitat von Andrea Aime <andrea.a...@geo-solutions.it>: > On Thu, Jun 14, 2012 at 3:44 PM, Biskup, Paul > <paul.bis...@fit.fichtner.de> wrote: >> Thanks for your answer! >> >> Correct me when I'm wrong, but I understood that the >> "pre-generalized feature" extension was made to improve the >> performance when displaying vector data. > > Displaying vector data (vector the data source) in WMS > > Generalizing data out of WFS might be considered out of standard, the > WFS is a pure query > service, does not transformations, summarization, simplification. > The protocol to use for simplification (which is a special case of > spatial analysis) should be WPS. > > The above is quite a strict vision and I could be persuaded that > simplification is so useful > that having in WFS would be nice, but then again, it seems like a > slippery slope. > > 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/ > http://www.youtube.com/user/GeoSolutionsIT > http://www.linkedin.com/in/andreaaime > http://twitter.com/geowolf > ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Geoserver-users mailing list Geoserver-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-users
