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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">Andrea,<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">Thank you for the clarification and the work around!<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">Regards,<br>
<br>
Richard<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>
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——</span><br>
<span style="FONT-FAMILY: Arial, sans-serif; FONT-WEIGHT: bold; COLOR: #004d44">Richard McDonnell MSc GIS, FME Certified Professional</span><br>
<span style="FONT-FAMILY: Arial, sans-serif; COLOR: #004d44"><i>FRM Data Management</i></span><br>
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<span style="FONT-FAMILY: Arial, sans-serif; COLOR: #565148">——</span><br>
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</span><br>
<span style="FONT-FAMILY: Arial, sans-serif; COLOR: #565148">Jonathan Swift Street, Trim, Co Meath, C15 NX36</span><br>
<span style="FONT-FAMILY: Arial, sans-serif; COLOR: #565148">——</span><br>
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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 <qgis-user-bounces@lists.osgeo.org>
<b>On Behalf Of </b>Andrea Giudiceandrea via Qgis-user<br>
<b>Sent:</b> 29 November 2022 16:14<br>
<b>To:</b> qgis-user@lists.osgeo.org<br>
<b>Subject:</b> Re: [Qgis-user] Problem Noticed with QGIS<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><b><span style="font-size:13.5pt;color:black">Richard McDonnell</span></b><span style="color:black"> </span><a href="mailto:qgis-user%40lists.osgeo.org?Subject=Re%3A%20%5BQgis-user%5D%20Problem%20Noticed%20with%20QGIS&In-Reply-To=%3C9708d6dac99943929281a173e54a9e6f%40opw.ie%3E" title="[Qgis-user] Problem Noticed with QGIS"><span style="font-size:13.5pt">richard.mcdonnell
at opw.ie</span></a><span style="font-size:13.5pt;color:black"><br>
</span><i><span style="color:black">Tue Nov 29 07:17:48 PST 2022</span></i> <o:p>
</o:p></p>
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<pre style="white-space:pre-wrap;font-variant-ligatures: normal;font-variant-caps: normal;orphans: 2;text-align:start;widows: 2;-webkit-text-stroke-width: 0px;text-decoration-thickness: initial;text-decoration-style: initial;text-decoration-color: initial;word-spacing:0px"><span style="color:black">1. If I use the option [Create temporary Layer] it produces a Singlepart Geometry as Expected, If I save the output to a File, the resultant geometry is stated as Polygon (MultiPolygon) Its the same for Linestrings also.<o:p></o:p></span></pre>
</blockquote>
<p class="MsoNormal"><br>
Hi Richard,<br>
as explained (also by me) in the linked issue report [1], the line (PolyLine) and polygon (Polygon) ESRI Shapefile layer types are actually multi-part layer types which can store both multi-part geometries with only one part and multi-part geometries with more
than one part.<br>
Only the point layer type has two different ESRI Shapefile layer types: the ESRI Shapefile Point type (which is a single-part type and can store only single-part geometries) and the ESRI Shapefile MultiPoint type (which is a multi-part type and can store multi-part
geometries both with only one part and with more than one part).<br>
<br>
Please see the ESRI Shapefile Technical Description [2].<br>
<br>
If you want to check that a line (PolyLine) and polygon (Polygon) ESRI Shapefile layer imported in QGIS contains features with only 1 part, you need to check the number of part for each feature, for example using the num_geometries function [3] in the field
calculator.<br>
<br>
Best regards.<br>
<br>
Andrea Giudiceandrea<br>
<br>
[1] <a href="https://github.com/qgis/QGIS/issues/50720">https://github.com/qgis/QGIS/issues/50720</a><br>
[2] <a href="https://www.esri.com/Library/Whitepapers/Pdfs/Shapefile.pdf/">https://www.esri.com/Library/Whitepapers/Pdfs/Shapefile.pdf/</a><br>
[3] <a href="https://docs.qgis.org/3.22/en/docs/user_manual/expressions/functions_list.html#num-geometries">
https://docs.qgis.org/3.22/en/docs/user_manual/expressions/functions_list.html#num-geometries</a>
<o:p></o:p></p>
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