Hi, We definitely need a better simplify algo in QGIS than Douglas Peucker. It is very fast, but does not really preserve the "shape" of polygons/lines and does not preserve topology. Your work seems interesting. Is you approach similar to Visvalingam algo (used for example in Mapshaper : http://mapshaper.org/ ) ? Does it preserve topology ? Having a simplifier that can preserver topology while being fast like Visvalingam would be great indeed !
ps: sorry to bring personnal will in response of your topic instead of really answering your question.. Michael 2014-02-03 giulianc51 <[email protected]>: > Hi all, > > > I do not know if this is the right place to talk about it but I think I > have found a small problem in the plugin fTools, particularly in the > "Simplify geometry" of the module "Geometry tool"; > > more precisely, the problem is in the RDP algorithm used by the > function; > > nothing dramatic, the procedure works properly and provides a > simplified line, but I have isolated some cases in which the solution > is not optimal: some points, not needed for the definition of the line, > are left; > > to sum up, I put some considerations in some slides here > http://www.slideshare.net/giulianc/clean-lines-presentation; > > can you tell me where and how it can be of interest to discuss this > topic? > > thanks, best regards, sfm+Gtbe(*) :-) > giuliano curti > > > (*) sorry for my (+ Google translation) bad english :-) > _______________________________________________ > Qgis-developer mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-developer >
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