<div dir="ltr"><div>Thanks a lot Johannes, very appreciated,</div><div>diving directly into your links.</div><div><br></div><div>Best,</div><div>Andrea</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 12, 2023 at 10:13 AM Johannes Kröger (WhereGroup) <<a href="mailto:johannes.kroeger@wheregroup.com">johannes.kroeger@wheregroup.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>Hey Andrea,</p>
<p>you can do it *if* your data source (or rather the provider that
QGIS uses for your data source) supports spatial queries for the
provider feature filtering.<br>
</p>
<p>Our "Räumlicher Filter" plugin does exactly that using
setSubsetString :))</p>
<ul>
<li><a href="https://github.com/WhereGroup/spatial_filter" target="_blank">https://github.com/WhereGroup/spatial_filter</a></li>
<li><a href="https://plugins.qgis.org/plugins/spatial_filter/" target="_blank">https://plugins.qgis.org/plugins/spatial_filter/</a><br>
</li>
</ul>
<p>Try it and look at the resulting filter queries or check how we
construct the filter strings:<br>
</p>
<ul>
<li><a href="https://github.com/WhereGroup/spatial_filter/blob/e77abb9830f5d46073239b8e7376c52a69046223/filters.py#L14" target="_blank">https://github.com/WhereGroup/spatial_filter/blob/e77abb9830f5d46073239b8e7376c52a69046223/filters.py#L14</a><br>
</li>
<li><a href="https://github.com/WhereGroup/spatial_filter/blob/e77abb9830f5d46073239b8e7376c52a69046223/filters.py#L45" target="_blank">https://github.com/WhereGroup/spatial_filter/blob/e77abb9830f5d46073239b8e7376c52a69046223/filters.py#L45</a></li>
</ul>
<p>As of now, the plugin supports it for PostGIS, GPKG and
Spatialite layers . It probably is easy to adapt for other
geospatial databases too.<br>
</p>
<p>Cheers, Hannes<br>
</p>
<div>Am 12.04.23 um 09:35 schrieb andrea
antonello via QGIS-User:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hello,
<div>I was wondering if in pyqgis there is a way to load a layer
to show only features that intersect a certain geometry. I see
the setSubsetString for sql like queries, but no way to do
this with geometries.</div>
<div><br>
</div>
<div>Similar to this (but only applied to iterations using
getFeatures), I was wondering if with QgsFeatureRequest and
expressions there is a way to create a geometry intersection
filter (I saw the setFilterRect). </div>
<div><br>
</div>
<div>Thanks a lot for any hint,</div>
<div>Andrea</div>
</div>
<br>
<fieldset></fieldset>
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<pre cols="72">--
Johannes Kröger / GIS-Entwickler/-Berater
---------------------------------------------
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</pre>
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