<div dir="auto">Thanks Carolina, great explanation.</div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, Jan 8, 2025, 22:14 Carolina Lang <<a href="mailto:carolina.lang@ifop.cl">carolina.lang@ifop.cl</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">




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Hello everyone,</div>
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I’m back with a solution to the issue I posted on December 29th, in case anyone comes across something similar.</div>
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The solution was proposed by Chris Hermansen and involves <span style="font-family:"Segoe UI","Segoe UI Web (West European)",-apple-system,BlinkMacSystemFont,Roboto,"Helvetica Neue",sans-serif;font-size:15px">
two steps:</span></div>
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<li style="font-family:"Segoe UI","Segoe UI Web (West European)",-apple-system,BlinkMacSystemFont,Roboto,"Helvetica Neue",sans-serif;font-size:15px;color:rgb(0,0,0)">
<div style="margin-top:1em;margin-bottom:1em"><b>Calculate the buffers (circles) around each point.</b></div>
</li><ul>
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Use <b>"Processing > SAGA Next Gen > Vector general > Shapes buffer"</b>.</li><li style="font-family:"Segoe UI","Segoe UI Web (West European)",-apple-system,BlinkMacSystemFont,Roboto,"Helvetica Neue",sans-serif;font-size:15px;color:rgb(0,0,0)">
Set the field <code>APA</code> as the buffer distance and do <b>not check</b> "Dissolve Buffers."</li><li style="font-family:"Segoe UI","Segoe UI Web (West European)",-apple-system,BlinkMacSystemFont,Roboto,"Helvetica Neue",sans-serif;font-size:15px;color:rgb(0,0,0)">
This will create a circle around each sampling point.<br>
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<img alt="image.png" width="578" height="303" size="388079" style="width:578px;height:303px;min-width:auto;min-height:auto;margin:0px" src="cid:2e819339-983b-40a0-8664-0b6819199ef9"></li></ul>
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<b>    2. Combine the buffers by their <code>file_name</code> to dissolve them.</b></div>
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<li style="font-family:"Segoe UI","Segoe UI Web (West European)",-apple-system,BlinkMacSystemFont,Roboto,"Helvetica Neue",sans-serif;font-size:15px;color:rgb(0,0,0)">
Use <b>"Vector > Geoprocessing Tools > Dissolve"</b>.</li></ul>
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Set the field <code>file_name</code> as the "Dissolve field."</li></ul>
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This will create a combined buffer for each <code>file_name</code> (e.g., one for
<code>L001_P1TV80</code>, another for <code>L002P2TV80</code>, etc.).</li></ul>
</ol>
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     The result should look like this: (provide visualization or reference here).</div>
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<img alt="image.png" width="578" height="303" size="276348" style="width:578px;height:303px;max-width:1055px;min-width:auto;min-height:auto;margin:0px" src="cid:dd33e704-7c1d-4bb2-8181-d5f15c2d9930"></div>
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I also recommend optimizing the process if you have hundreds of files to process by using the
<b><i>Graphical Modeler.</i></b></div>
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Thanks, Chris, for your help!</div>
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Cheers,</div>
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Carolina Lang</div>
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<div id="m_-3524866075790325956divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Carolina Lang<br>
<b>Sent:</b> December 29, 2024 9:38 PM<br>
<b>To:</b> <a href="mailto:qgis-user@lists.osgeo.org" target="_blank" rel="noreferrer">qgis-user@lists.osgeo.org</a> <<a href="mailto:qgis-user@lists.osgeo.org" target="_blank" rel="noreferrer">qgis-user@lists.osgeo.org</a>><br>
<b>Subject:</b> Help with Buffer and Category-Specific Geometry Outputs in QGIS</font>
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Hello everyone,</div>
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I'm using QGIS 3.34 and working with the vector-geometry-buffer function on a shapefile containing multiple spatial points, categories (or location type) are represented as a group of these spatial points. For each category, my goal is to calculate the geometries
 (perimeter and area) created by the buffers. </div>
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While the output result includes these geometries, it does not properly associate them with their respective categories. Instead, for each row in the output, I see the same category listed but with varying perimeters and areas, making it difficult to distinguish
 which geometries belong to which category.</div>
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Example</div>
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input file_(here I use column APA_radius as variable distances for buffer)</div>
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<img id="m_-3524866075790325956x_image_1" width="280" height="141" size="59928" style="width:280.827px;height:141px;max-width:1157px" src="cid:758816fb-ea5b-411d-8cc1-30dc566b1186"></div>
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output file_9as you can see geometries for both categories but no idea which geometries belong to which category)</div>
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<img id="m_-3524866075790325956x_image_0" width="281" height="38" size="17861" style="width:281.724px;height:38px;max-width:1157px" src="cid:c6279fc3-a799-4223-b47d-d5a9d61261e3"></div>
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Has anyone encountered this issue before? Is there a specific step or method I might be missing to properly link the geometries to their respective categories?</div>
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Cheers & Happy Holydays!!</div>
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Carolang-Chile</div>
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