In QGIS 2.x you can now clean your vector geometries using a tool (for the Proxessing toolbox) that make use of the LWGEOM library, the one used by the PostGIS ST_MakeValid tool, see http://ift.tt/2kDQT9I In QGIS follow this steps: *) install the lwgeom library with the osgeo4w installer *) install the “Processing LWGEOM Provider” plugin ...
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