https://issues.qgis.org/https://issues.qgis.org/favicon.ico2011-10-29T12:36:11ZQGIS Issue TrackingQGIS Application - Bug report #4462: When drawing a new polygon it inverts existing parts of the polygonhttps://issues.qgis.org/issues/4462?journal_id=261572011-10-29T12:36:11ZGiovanni Manghigiovanni.manghi@gmail.com
<ul></ul><p>can't see any attached image. It would be useful to understand better what do you mean.</p> QGIS Application - Bug report #4462: When drawing a new polygon it inverts existing parts of the polygonhttps://issues.qgis.org/issues/4462?journal_id=261592011-10-29T12:45:50ZGerhardus Geldenhuisgerhardus.geldenhuis@gmail.com
<ul><li><strong>File</strong> <a href="/attachments/download/3509/Screenshot01.png">Screenshot01.png</a> added</li></ul><p>Apologies must have missed off the image. Hope it helps to clarify what I mean.</p> QGIS Application - Bug report #4462: When drawing a new polygon it inverts existing parts of the polygonhttps://issues.qgis.org/issues/4462?journal_id=261742011-10-30T04:13:47ZGiovanni Manghigiovanni.manghi@gmail.com
<ul><li><strong>Category</strong> changed from <i>GUI</i> to <i>Digitising</i></li><li><strong>Status</strong> changed from <i>Open</i> to <i>Feedback</i></li></ul><p>The overlapped part it hasn't a "reverted color" it is (it becomes) a <strong>hole</strong>. The simple features model does not allow to draw such geometries (self-overlapping), and QGIS let you know by marking those two nodes with a green "X".</p>
<p>I agree with others that eventually allow to draw such wrong geometries it is not right. An option that can be eventually be discussed/added could be the one to make qgis refuse to add invalid geometries.</p> QGIS Application - Bug report #4462: When drawing a new polygon it inverts existing parts of the polygonhttps://issues.qgis.org/issues/4462?journal_id=261822011-10-30T12:00:39ZGerhardus Geldenhuisgerhardus.geldenhuis@gmail.com
<ul></ul><p>I should have been clearer. The screenshot is in mid-edit so the edit is not finished. I would certainly agree that you should not be allowed to make "wrong" geometries. What I am suggesting is that when you are digitizing a complex shape it would be useful when you overlap the existing polygon to not become a "hole" but rather double in colour density. That would be more intuitive. I am not suggesting the ability to draw wrong shapes but suggesting a more intuitive way for the polygon "shadow" or whatever the correct terminology is to behave in a more real life physical way. I equate the to folding a piece of semi transparent film over it self, it will darken in colour every time you fold it.</p> QGIS Application - Bug report #4462: When drawing a new polygon it inverts existing parts of the polygonhttps://issues.qgis.org/issues/4462?journal_id=261832011-10-30T12:02:55ZGiovanni Manghigiovanni.manghi@gmail.com
<ul></ul><p>Gerhardus Geldenhuis wrote:</p>
<blockquote>
<p>I should have been clearer. The screenshot is in mid-edit so the edit is not finished. I would certainly agree that you should not be allowed to make "wrong" geometries. What I am suggesting is that when you are digitizing a complex shape it would be useful when you overlap the existing polygon to not become a "hole" but rather double in colour density. That would be more intuitive. I am not suggesting the ability to draw wrong shapes but suggesting a more intuitive way for the polygon "shadow" or whatever the correct terminology is to behave in a more real life physical way. I equate the to folding a piece of semi transparent film over it self, it will darken in colour every time you fold it.</p>
</blockquote>
<p>ok, now is clearer, but the doubt remains, why do so if at the end that area will become an hole anyway?</p> QGIS Application - Bug report #4462: When drawing a new polygon it inverts existing parts of the polygonhttps://issues.qgis.org/issues/4462?journal_id=261852011-10-30T12:19:56ZGerhardus Geldenhuisgerhardus.geldenhuis@gmail.com
<ul><li><strong>File</strong> <a href="/attachments/download/3513/Screenshot-1.png">Screenshot-1.png</a> added</li><li><strong>File</strong> <a href="/attachments/download/3512/Screenshot.png">Screenshot.png</a> added</li></ul><p>I will explain with an example the first image is midway through editing and the second image is the result. It is per illustration only. However I realize while creating these images that there is a logic problem... I don't think what I am asking is doable anyway... I am expecting the computer to know what I want to do and it can't possibly do that...</p> QGIS Application - Bug report #4462: When drawing a new polygon it inverts existing parts of the polygonhttps://issues.qgis.org/issues/4462?journal_id=261872011-10-30T13:28:14ZGiovanni Manghigiovanni.manghi@gmail.com
<ul></ul><p>Gerhardus Geldenhuis wrote:</p>
<blockquote>
<p>I will explain with an example the first image is midway through editing and the second image is the result. It is per illustration only. However I realize while creating these images that there is a logic problem... I don't think what I am asking is doable anyway... I am expecting the computer to know what I want to do and it can't possibly do that...</p>
</blockquote>
<p>I understand your point, but as you say, what the program can do for it?</p>
<p>Any evidence that other sw packages (gvsig, udig, kosmo, etc.) do work in a way that can be considered better than the qgis way?</p> QGIS Application - Bug report #4462: When drawing a new polygon it inverts existing parts of the polygonhttps://issues.qgis.org/issues/4462?journal_id=261892011-10-30T13:34:59ZGerhardus Geldenhuisgerhardus.geldenhuis@gmail.com
<ul></ul><p>I have not used any of the other software packages mentioned so would unfortunetly have no idea. On the whole so far I have really liked the experience in QGIS</p> QGIS Application - Bug report #4462: When drawing a new polygon it inverts existing parts of the polygonhttps://issues.qgis.org/issues/4462?journal_id=261902011-10-30T13:47:36ZGiovanni Manghigiovanni.manghi@gmail.com
<ul></ul><p>Gerhardus Geldenhuis wrote:</p>
<blockquote>
<p>I have not used any of the other software packages mentioned so would unfortunetly have no idea. On the whole so far I have really liked the experience in QGIS</p>
</blockquote>
<p>at the next developer meeting I will try to have a chat with the devs about this matters (in general how overlapping polygons are handled).</p> QGIS Application - Bug report #4462: When drawing a new polygon it inverts existing parts of the polygonhttps://issues.qgis.org/issues/4462?journal_id=276492011-12-16T13:10:11ZGiovanni Manghigiovanni.manghi@gmail.com
<ul><li><strong>Target version</strong> set to <i>Version 1.7.4</i></li></ul> QGIS Application - Bug report #4462: When drawing a new polygon it inverts existing parts of the polygonhttps://issues.qgis.org/issues/4462?journal_id=311192012-04-16T04:31:51ZPaolo Cavallinicavallini@faunalia.it
<ul><li><strong>Target version</strong> changed from <i>Version 1.7.4</i> to <i>Version 1.8.0</i></li><li><strong>Affected QGIS version</strong> set to <i>master</i></li><li><strong>Crashes QGIS or corrupts data</strong> set to <i>No</i></li></ul> QGIS Application - Bug report #4462: When drawing a new polygon it inverts existing parts of the polygonhttps://issues.qgis.org/issues/4462?journal_id=344512012-09-04T09:56:40ZPaolo Cavallinicavallini@faunalia.it
<ul><li><strong>Target version</strong> changed from <i>Version 1.8.0</i> to <i>Version 2.0.0</i></li></ul> QGIS Application - Bug report #4462: When drawing a new polygon it inverts existing parts of the polygonhttps://issues.qgis.org/issues/4462?journal_id=536152014-06-28T05:41:04ZJürgen Fischerjef@norbit.de
<ul><li><strong>Target version</strong> changed from <i>Version 2.0.0</i> to <i>Future Release - Lower Priority</i></li></ul> QGIS Application - Bug report #4462: When drawing a new polygon it inverts existing parts of the polygonhttps://issues.qgis.org/issues/4462?journal_id=561932014-10-11T05:19:28ZGiovanni Manghigiovanni.manghi@gmail.com
<ul><li><strong>Status</strong> changed from <i>Feedback</i> to <i>Closed</i></li><li><strong>Resolution</strong> set to <i>wontfix</i></li></ul>