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<p>Hi Jorge,</p>
It doesn't explain nor fix the issue with your expression but mind
trying <i>array_sum(overlay_contains('03-04-2021', 'Active'))</i>?
No working QGIS around to test myself.<br>
<pre class="moz-quote-pre" wrap=""><font size="+1">I don't remember if array_sum was introduced in 3.18 or master but overlay_** requires at least 3.16.
Regards,
Harrissou</font><font size="+1">
</font></pre>
<div class="moz-cite-prefix">Le 14/03/2021 à 22:47, David Strip a
écrit :<br>
</div>
<blockquote type="cite"
cite="mid:e72f1308-7141-bea1-323c-ed08dee205d0@stripfamily.net">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
I was able to replicate your problem on my system (Win 10, QGIS
3.10.5).<br>
<br>
I tried "Join attributes by location (summary)". This computed the
result in about 5 seconds. <br>
There are some anomalies in the data, however. For example,
there's an entry for Belgium with province value "Unknown" and no
lat/lon, so it doesn't get included in the total. Also, the point
for Northern Territories, Australia, lies in the ocean, so it is
not contained in the Australia polygon. <br>
<br>
<br>
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