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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Hi Jens,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">I guess there is more than one way to combine your lines into a single object – you could end up with a multipart object (multilinestring)
or a single polyline.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Have you tried the Dissolve command? I quick test for me produced a single polyline with no duplicate points from two separate lines.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Martin.<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Qgis-user [mailto:qgis-user-bounces@lists.osgeo.org]
<b>On Behalf Of </b>Jens Verwaerde | Natuurpunt CVN<br>
<b>Sent:</b> Tuesday, 13 June 2017 11:49 PM<br>
<b>To:</b> qgis-user@lists.osgeo.org<br>
<b>Subject:</b> [Qgis-user] Joining polylines with overlapping points to 1 polyline with merged points<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">I have a walking route, that I've digitized in 18 polylines, of which the endpoint is the exact same location as the beginning point of the next polyline.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">When I merge these 18 polylines, the overlapping points stay, unfortunately, overlapping points. Visually there's no problem: they behave as 1 polyline, but ... this causes all sorts of problems:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">-- exporting to gpx gives faulty routes<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">-- combining these polylines to a polygon gives polygon rubbish<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">-- double (or even more) points stay, although I want them to be joined to one point<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">-- tracing always stops when I reach the end or beginning of a polyline part<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">How can this be solved?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">The only thing that actually worked for me is to make a new layer/shapefile ("traced.shp") and then manually trace the polylines (using the autotrace). In Mapinfo this operation is way much
more efficient.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">So I'm looking for a way to make 1 polyline with non-overlapping points out of a series of polylines in Qgis.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif">Jens Verwaerde</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Tahoma",sans-serif"><img id="_x0000_i1025" src="http://www.natuurpunt.be/sites/default/files/images/inline/logohandtekening.png"></span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:9.5pt">Website: </span><a href="http://cvn.natuurpunt.be" target="_blank"><span style="font-size:9.5pt">http://cvn.natuurpunt.be</span></a><o:p></o:p></p>
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