Try this.
http://www.qgistutorials.com/fr/docs/points_in_polygon.html
Nicolas
> Le 19 oct. 2016 à 06:37, DelazJ [via OSGeo.org]
> <ml-node+s1560n5291420...@n6.nabble.com> a écrit :
>
> Hi,
>
> I have a polygon layer and a point one.
> I'd like to calculate for each polygon feature, the number of points that it
> covers. I thought the aggregates functions could help me find an easier and
> straight expression to perform this (without creating intermediate layers)
> but I fail to find any correct syntax.
>
> I tried aggregate ('mypoint', 'count', "id", intersects ($geometry,
> geometry($currentfeature)))
>
> And many variants of the fourth option but It always return the total of
> points or an error. Actually this option is a filter and I wonder if i'm not
> missing a "group by" option in the aggregate function (which seems to be the
> appropriate one in my case). Is it possible?
>
> The work around I found is to populate an ad'hoc field in the point layer
> with overlapping polygon id, thanks to the SpatialJoin plugin, then I create
> a one-to-many relation in the project between the two layers in other to use
> relation_aggregate function.
> But I expected something more direct.
>
> Any hint, please?
>
> Thanks,
> Harrissou
>
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