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<p>Hi Simon and Nicolas,</p>
<p>Yes, that was our idea, too - to merge two or more lines that share their start/end vertices.</p>
<p>But unfortunately, this doesn't work for us, because we edit in a very complex data model and QGIS doesn't preserve feature Ids when merging features --> all of our DB relations would then fail.</p>
<p>See https://github.com/qgis/QGIS/issues/47629</p>
<p>I asked our commercial support provider to hopefully fix this issue ... then we could go the "merge route".</p>
<p>Andreas</p>
<p id="reply-intro">On 2022-03-04 09:29, Simon Dietmann via Qgis-user wrote:</p>
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<p class="v1MsoNormal"><span style="mso-fareast-language: EN-US;">Hi Andreas,</span></p>
<p class="v1MsoNormal"><span style="mso-fareast-language: EN-US;"> </span></p>
<p class="v1MsoNormal"><span style="mso-fareast-language: EN-US;">as a workaround for your problem I would suppose you draw a new line feature using the tracing function and then merge it with the one you want to extend.</span></p>
<p class="v1MsoNormal"><span style="mso-fareast-language: EN-US;">That should work without any problem.</span></p>
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<p class="v1MsoNormal"><span style="font-size: 10.0pt; font-family: 'Arial',sans-serif;"><br /><br /></span><span style="font-size: 10.0pt; font-family: 'Arial',sans-serif;">Simon Dietmann<br /></span><span style="font-size: 9.0pt; font-family: 'Arial',sans-serif; color: #999999;">M.Sc. Physische Geografie</span></p>
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<p class="v1MsoNormal"><strong>Von:</strong> Qgis-user <qgis-user-bounces@lists.osgeo.org> <strong>Im Auftrag von </strong>Nicolas Cadieux via Qgis-user<br /><strong>Gesendet:</strong> Freitag, 4. März 2022 05:13<br /><strong>An:</strong> Andreas Neumann <a.neumann@carto.net><br /><strong>Cc:</strong> QGIS User List <qgis-user@lists.osgeo.org><br /><strong>Betreff:</strong> Re: [Qgis-user] Extending an existing line with the vertex tool - combination with tracing possible?</p>
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<p class="v1MsoNormal">Hi,</p>
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<p class="v1MsoNormal">To my knowledge, when using the vertex tool, you click on the last node and then, you can extend it once. I think you need to reclick the last node again if you want to add a new point. I don't do much vectorizing lately and in the past, used AutoCAD to do it. There must be some other way of doing it. Maybe there is a shortcut or something like the shift key we need to use. I would check the user manual to see if there is an option under the vertex tool. I see that lots of new tools have been added lately making QGIS a good contender for tracing. I guess you could just create a new line and then merge both together.</p>
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<p class="v1MsoNormal" style="margin-bottom: 12.0pt;">Just my grain of salt...</p>
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<p class="v1MsoNormal">Nicolas Cadieux</p>
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<p class="v1MsoNormal"><a href="https://gitlab.com/njacadieux" target="_blank" rel="noopener noreferrer">https://gitlab.com/njacadieux</a></p>
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<p class="v1MsoNormal" style="margin-bottom: 12.0pt;">Le 1 mars 2022 à 05:24, Andreas Neumann <<a href="mailto:a.neumann@carto.net" rel="noreferrer">a.neumann@carto.net</a>> a écrit :</p>
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<p>Hi,</p>
<p>When I am extending an existing line with the vertex tool (by enabling the vertex tool and clicking on the small "plus" symbol), can I then still activate the "tracing" functionality to follow along other features?</p>
<p>If yes, I haven't found out how - any hints would be appreciated a lot!</p>
<p>Thanks,</p>
<p>Andreas</p>
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