Hi Jorge, I have created 10 features with SEXTANTE "Create random vector layer" tool and then applied both "Polygonize" and "Derivative geometries". It seems that the results are quite different. The "derivative" polygons overlap themselves, while the polygonized ones not. :-( I'm agree with Fran. In this case, it seems that the external rectangle doesn't intersect the internal lines at all, so it's surely a problem of precision/snapping. SEXTANTE Polygonize tool nodes lines and merges them using an enhanced precision in order to avoid topology exceptions, however it doesn't snap "quite near" vertices. I think that we need more robust topology checks in SEXTANTE and gvSIG in order to make them more reliable and powerful in a production environment.
Cheers, Antonio Il 18/05/2011 17.30, Jorge Santos ha scritto: > Dude, it's very easy convert lines to polygons in gvSIG.You must try > the Derivative Geometries. > > *Layer Menu - Derivative Geometries* > > I draw a similar feature and convert polyline to polygon with close > geometries. See attatchment. > > Best wishes, > > _________________ > Jorge Santos > Téc. emGeodésiae Cartografia > http://processamentodigital.blogspot.com/ > http://twitter.com/jpsantos2002 > Skype: jorgepsantos2002 > > 2011/5/18 Gio_ca <maccionigiova...@libero.it > <mailto:maccionigiova...@libero.it>> > > I tried what Antonio suggested but I got the same result... > > -- > View this message in context: > > http://osgeo-org.1803224.n2.nabble.com/Problem-from-polylines-to-polygons-tp6377472p6377788.html > Sent from the gvSIG users mailing list archive at Nabble.com. > _______________________________________________ > Gvsig_internacional mailing list > Gvsig_internacional@listserv.gva.es > <mailto:Gvsig_internacional@listserv.gva.es> > http://listserv.gva.es/cgi-bin/mailman/listinfo/gvsig_internacional > > > > _______________________________________________ > Gvsig_internacional mailing list > Gvsig_internacional@listserv.gva.es > http://listserv.gva.es/cgi-bin/mailman/listinfo/gvsig_internacional -- Antonio Falciano http://www.linkedin.com/in/antoniofalciano _______________________________________________ Gvsig_internacional mailing list Gvsig_internacional@listserv.gva.es http://listserv.gva.es/cgi-bin/mailman/listinfo/gvsig_internacional
