In this bug report: http://hub.qgis.org/issues/4567 there is a link with the data provided: http://hub.qgis.org/attachments/5563/shapes_and_fake_polys.zip
Giovanni Manghi updated the report: ...the tool is not wrong, in fact if you see in detail (see attached screenshot) the two polygons that seems wrong after the union are not identical in the input layers, there is a very small difference, something like 0.4 mm... but this makes them two non identical, overlapping polygons... It would be n i c e if the use can provide a tolerance to the tool. In this way, this would avoid some of the spurious data that appear when doing overlays. --------------------------- Iván Santiago GIS Specialist Information Technologies Office of Management and Budget 787.725.9420 x 2378 Calle Cruz 254 PO Box 9023228 San Juan, PR 00902-3228 -----Original Message----- From: Victor Olaya [mailto:[email protected]] Sent: Tuesday, May 07, 2013 10:02 AM To: Ivan Santiago Cc: [email protected]; [email protected] Subject: Re: [Qgis-user] Union Tool - Ftools/Sextante - How should the real result be Ivan could you provide some small dataset where you are seeing that? Information about SEXTANTE version is also welcome (I assume you are using the latest QGIS master, but just in case...There is no need to reinstall SEXTANTE, just reinstall the latest QGIS dev, which includes SEXTANTE) Thanks! 2013/5/7 Ivan Santiago <[email protected]>: > Hello: > > > > I downloaded (now) and reinstalled Sextante. > > > > Unfortunately the results were the same, holding duplicate polygons > when using Union tool. > > > > It is easy to see the dups applying transparency. > > > > > > --------------------------- > Iván Santiago > GIS Specialist > Information Technologies > Office of Management and Budget > 787.725.9420 x 2378 > Calle Cruz 254 > PO Box 9023228 > San Juan, PR 00902-3228 > > _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
