Re: [Qgis-user] Clean a raster layer converted in vector layer
Hi Giacomo, i would recommend filtering the raster before vectorizing. You can use the sieve tool or a majority filter (via processing). With the sieve tool you can set a threshold value which will define the minimum number of pixels a cluster must have to be preserved, otherwise it will be merged with the neighboring clusters. Cheers -- View this message in context: http://osgeo-org.1560.x6.nabble.com/Clean-a-raster-layer-converted-in-vector-layer-tp5201847p5201865.html Sent from the Quantum GIS - User mailing list archive at Nabble.com. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Clean a raster layer converted in vector layer
Better reclassify the raster beforehand. All the best. Il 17 aprile 2015 16:13:45 CEST, Giacomo Fontanelli ha scritto: >Dear forum > >I converted my raster layer in a vector - polygons one. > >The operation worked, but now I have a many small isolated polygons >with >one or few pixels dimension. > >Many of those small polygons also overlay the correct polygons. > >Ho can I easily remove this? > >Thank you very much > >Giacomo > > > > >___ >Qgis-user mailing list >Qgis-user@lists.osgeo.org >http://lists.osgeo.org/mailman/listinfo/qgis-user -- http://faunalia.eu/ Sent from mobile, sorry for being short___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Clean a raster layer converted in vector layer
Dear forum I converted my raster layer in a vector - polygons one. The operation worked, but now I have a many small isolated polygons with one or few pixels dimension. Many of those small polygons also overlay the correct polygons. Ho can I easily remove this? Thank you very much Giacomo ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
