https://issues.qgis.org/https://issues.qgis.org/favicon.ico2017-07-13T10:53:11ZQGIS Issue TrackingQGIS Application - Bug report #16860: "split lines with lines" algorithm, different results in QGIS 2.14.12 vs QGIS 2.18.3https://issues.qgis.org/issues/16860?journal_id=808662017-07-13T10:53:11ZGiovanni Manghigiovanni.manghi@gmail.com
<ul><li><strong>Operating System</strong> changed from <i>windows 7 for QGIS 2.14.12 andwindows 10 for QGIS 2.18.3</i> to <i>windows 7 for QGIS 2.14.12 and windows 10 for QGIS 2.18.3</i></li><li><strong>Subject</strong> changed from <i>Split-Algorithm in QGIS 2.14.12 vs QGIS 2.18.3</i> to <i>"split lines with lines" algorithm, different results in QGIS 2.14.12 vs QGIS 2.18.3</i></li><li><strong>Category</strong> changed from <i>Documentation and Help</i> to <i>Processing/QGIS</i></li><li><strong>Status</strong> changed from <i>Open</i> to <i>Feedback</i></li><li><strong>Assignee</strong> changed from <i>Yves Jacolin</i> to <i>Victor Olaya</i></li></ul><p>Hi,</p>
<p>a few things:</p>
<p>*) the tools is a native QGIS one, not a GRASS one</p>
<p>*) you don't add any sample data (can you?) or say what is the expected/correct result, the one you see in 2.14 or 2.18?</p>
<p>*) can you please update to the latest 2.18 available, 2.18.10 and try again? Also check that you are not using an old Processing version, check inside .qgis2/pyhton/plugins for a folder called "processing", if there is one then delete it and restart QGIS.</p> QGIS Application - Bug report #16860: "split lines with lines" algorithm, different results in QGIS 2.14.12 vs QGIS 2.18.3https://issues.qgis.org/issues/16860?journal_id=808722017-07-13T11:27:34Ze kendadabenda@yahoo.de
<ul></ul><p>Hi,<br />no, i have not any sample data, so I don't know which are the correct result.</p>
<p>The problem is:</p>
<p>I,ve modelled a process with the graphical modeller of QGis Desktop 2.14.12 with GRASS 7.2.0. For controlling if this modeller run to another Version, I,ve used my modell with QGIS Desktop 2.18.3 with GRASS 7.2.0.</p>
<p>After comparing the single algorithm steps, I could determine, that the problem is the "Split lines with lines"-algorithm. On this step I get a number of datasets of 179053 with the version 2.14.14 and 178848 with the version 2.18.3</p>
<p>Now I don't know wich number of datasets are the correct one and why there are difference.</p>
<p>Could it be that the algorithm is changed in Version 2.18, except that it runs faster?</p>
<p>I've used for both versions different operating systems (Windows 7 for Qgis 2.14.12 and Windows 10 for Qgis 2.18.3)</p> QGIS Application - Bug report #16860: "split lines with lines" algorithm, different results in QGIS 2.14.12 vs QGIS 2.18.3https://issues.qgis.org/issues/16860?journal_id=808732017-07-13T11:37:59ZGiovanni Manghigiovanni.manghi@gmail.com
<ul></ul><p>e k wrote:</p>
<blockquote>
<p>Hi,<br />no, i have not any sample data, so I don't know which are the correct result.</p>
</blockquote>
<p>ummm.... yes you have it... the data you are using in this model, specifically the inputs you are using for this operation (split lines with lines), can you attach them?</p> QGIS Application - Bug report #16860: "split lines with lines" algorithm, different results in QGIS 2.14.12 vs QGIS 2.18.3https://issues.qgis.org/issues/16860?journal_id=808772017-07-13T12:19:25Ze kendadabenda@yahoo.de
<ul><li><strong>File</strong> <a href="/attachments/download/11169/Input_for_splitting.PNG">Input_for_splitting.PNG</a> added</li></ul> QGIS Application - Bug report #16860: "split lines with lines" algorithm, different results in QGIS 2.14.12 vs QGIS 2.18.3https://issues.qgis.org/issues/16860?journal_id=808812017-07-13T13:28:08Ze kendadabenda@yahoo.de
<ul></ul><p>I know the number of the datasets before running the modeller.<br />And I know the number of the datasets at the beginning of the "split lines with lines"-algorithm, but how should I know the correct result of the splitted layer, when i get difference numbers of datasets after run this algorithm?</p>
<p>My modeller runs with both versions, but even the number of the the datasets (the result) is differently.</p>
<p>Therefor I think that the splitting algorithm is not the same in both versions.</p>
<p>Could it be?</p> QGIS Application - Bug report #16860: "split lines with lines" algorithm, different results in QGIS 2.14.12 vs QGIS 2.18.3https://issues.qgis.org/issues/16860?journal_id=808822017-07-13T15:24:26ZGiovanni Manghigiovanni.manghi@gmail.com
<ul></ul><p>e k wrote:</p>
<blockquote>
<p>I know the number of the datasets before running the modeller.<br />And I know the number of the datasets at the beginning of the "split lines with lines"-algorithm, but how should I know the correct result of the splitted layer, when i get difference numbers of datasets after run this algorithm?</p>
<p>My modeller runs with both versions, but even the number of the the datasets (the result) is differently.</p>
<p>Therefor I think that the splitting algorithm is not the same in both versions.</p>
<p>Could it be?</p>
</blockquote>
<p>let's try it again:<br />if you cannot send the inputs of the "split lines with lines" tool, can you send the file of your model and the starting input/s of the model?</p> QGIS Application - Bug report #16860: "split lines with lines" algorithm, different results in QGIS 2.14.12 vs QGIS 2.18.3https://issues.qgis.org/issues/16860?journal_id=831062017-09-25T14:37:06ZGiovanni Manghigiovanni.manghi@gmail.com
<ul><li><strong>Resolution</strong> set to <i>not reproducable</i></li><li><strong>Status</strong> changed from <i>Feedback</i> to <i>Closed</i></li></ul>