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<p>Hi,<br>
</p>
<p>Unfortunately, the $geometry field with the original polygons no
longer exists. Layers only have one geometry field at a time
unless you specifically create something like a wkt of wkb field.</p>
<p>If it's was a regular grid, then yes, you could recreate it using
vector/research tools/create grid. As suggested, a Voronoi
Polygons could work or maybe a tin mesh... If you are on Windows
10 and have activated the file versioning, maybe you have an old
copy of the file.<br>
</p>
<p>Nicolas<br>
</p>
<div class="moz-cite-prefix">On 2022-03-16 12:08 p.m., chris
hermansen via Qgis-user wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CACc2_6-o5Oz9OpUA5JFGhbJ7=WLTjwcNaFvEenj6Ra4nFiRmqA@mail.gmail.com">
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<div dir="auto">
<div>Francesca and list,<br>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Wed, Mar 16, 2022,
03:06 Francesca Parente via Qgis-user <<a
href="mailto:qgis-user@lists.osgeo.org"
moz-do-not-send="true" class="moz-txt-link-freetext">qgis-user@lists.osgeo.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Hello group,
<div><br>
</div>
<div>I'd have a question I hope it doesn't sound too
nonsense to you: I'm working on a points shapefile,
which I know has been created by centroids of
polygons- but I don't have access to polygonal areas. </div>
<div>I would need to select just those in some locations
and recover their original area within polygonal
borders.</div>
<div><br>
</div>
<div>Is there a chance I can get it done by having this
shapefile of centroids only?!<br clear="all">
</div>
</div>
</blockquote>
</div>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">Polygon centroids aren't necessarily inside
polygons, so selecting centroids that fall within other areas
doesn't mean the original polygons would also lie within those
areas.</div>
<div dir="auto"><br>
</div>
<div dir="auto">Also if you are trying to determine the
proportion of the original polygons within the other areas
(the intersections of the two sets) you must have the original
polygons.</div>
<div dir="auto"><br>
</div>
<div dir="auto">I doubt that answers achieved with only the
centroids would provide any meaningful results.</div>
<div dir="auto"><br>
</div>
<div dir="auto">Chris</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
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</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Nicolas Cadieux
<a class="moz-txt-link-freetext" href="https://gitlab.com/njacadieux">https://gitlab.com/njacadieux</a></pre>
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