https://issues.qgis.org/https://issues.qgis.org/favicon.ico2009-08-10T13:50:39ZQGIS Issue TrackingQGIS Application - Bug report #1758: Tools (Ftools): clip and difference tools give the same resultshttps://issues.qgis.org/issues/1758?journal_id=193632009-08-10T13:50:39Zcfarmer -cfarmer@foo.bar
<ul><li><strong>Status</strong> changed from <i>Open</i> to <i>Closed</i></li><li><strong>Resolution</strong> set to <i>fixed</i></li></ul><p>Should now be fixed in <a class="changeset" href="https://issues.qgis.org/projects/qgis/repository/revisions/b466b2b6a8444b7c00c85d81b05928e3b5b9a3bd" title="Fix clip geoprocessing function: Fixes #1758 git-svn-id: http://svn.osgeo.org/qgis/trunk@11339 c...">b466b2b6</a> (SVN r11340). Please test and reopen ticket if not fixed properly.<br />Note: In some cases geometries may still be mis-formed. This is a separate issue, and will be addressed soon.</p>
<p>- Carson</p> QGIS Application - Bug report #1758: Tools (Ftools): clip and difference tools give the same resultshttps://issues.qgis.org/issues/1758?journal_id=193642009-08-10T23:33:36ZGiovanni Manghigiovanni.manghi@gmail.com
<ul></ul><p>Replying to [comment:2 cfarmer]:</p>
<blockquote>
<p>Note: In some cases geometries may still be mis-formed. This is a separate issue, and > will be addressed soon.</p>
</blockquote>
<p>See attached image. Is this one of this cases?</p> QGIS Application - Bug report #1758: Tools (Ftools): clip and difference tools give the same resultshttps://issues.qgis.org/issues/1758?journal_id=193652009-08-11T05:15:10Zcfarmer -cfarmer@foo.bar
<ul></ul><p>Replying to [comment:4 lutra]:</p>
<blockquote>
<p>See attached image. Is this one of this cases?</p>
</blockquote>
<p>Yes. This appears to be an issue with the type of geometries that GEOS is returning. I have tried to eliminate these spurious geometries, but as you can see there is still some cleaning up to do...</p>
<p>-Carson</p> QGIS Application - Bug report #1758: Tools (Ftools): clip and difference tools give the same resultshttps://issues.qgis.org/issues/1758?journal_id=193662009-08-11T05:16:36ZGiovanni Manghigiovanni.manghi@gmail.com
<ul></ul><p>I don't know if it is important, but have you noticed that with Intersect this doesn't happens?</p> QGIS Application - Bug report #1758: Tools (Ftools): clip and difference tools give the same resultshttps://issues.qgis.org/issues/1758?journal_id=193672009-08-11T15:51:43Zcfarmer -cfarmer@foo.bar
<ul></ul><p>Replying to [comment:4 lutra]:</p>
<blockquote>
<p>See attached image. Is this one of this cases?</p>
</blockquote>
<p>This should now be behaving properly in <a class="changeset" href="https://issues.qgis.org/projects/qgis/repository/revisions/ad3028bbe6ec6acc0c8bf9d5085ef452dbbacacc" title="Additional updates to 'Clip' Geoprocessing tool: Properly fixes #1758. git-svn-id: http://svn.os...">ad3028bb</a> (SVN r11349). I have changed the underlying logic, so this tools should be slightly faster, and work better with large, complex datasets.</p>
<p>The test dataset provided with this ticket now works properly (as far as I can tell), however, please test and reopen this ticket if problem(s) persists.</p>
<p>-Carson</p> QGIS Application - Bug report #1758: Tools (Ftools): clip and difference tools give the same resultshttps://issues.qgis.org/issues/1758?journal_id=193682009-08-11T23:19:51ZGiovanni Manghigiovanni.manghi@gmail.com
<ul></ul><p>Replying to [comment:7 cfarmer]:</p>
<blockquote>
<p>The test dataset provided with this ticket now works properly (as far as I can tell), however, please test and reopen this ticket if problem(s) persists.</p>
</blockquote>
<p>Seems to work fine!</p>
<p>Thanks a lot,</p>
<p>-- Giovanni --</p> QGIS Application - Bug report #1758: Tools (Ftools): clip and difference tools give the same resultshttps://issues.qgis.org/issues/1758?journal_id=193692009-10-06T23:01:18ZPaolo Cavallinicavallini@faunalia.it
<ul><li><strong>Status</strong> changed from <i>Closed</i> to <i>Feedback</i></li><li><strong>Resolution</strong> deleted (<del><i>fixed</i></del>)</li></ul><p>Now clip and difference seem to give the same result</p> QGIS Application - Bug report #1758: Tools (Ftools): clip and difference tools give the same resultshttps://issues.qgis.org/issues/1758?journal_id=193702009-11-30T00:24:41ZGiovanni Manghigiovanni.manghi@gmail.com
<ul><li><strong>Resolution</strong> set to <i>worksforme</i></li><li><strong>Status</strong> changed from <i>Feedback</i> to <i>Closed</i></li></ul><p>Hi Paolo, I made a few tests and seems to me that clip and difference are giving the right results. Feel free to reopen if is the case.</p>