8
votes
Accepted
Selecting only one point in polygon using QGIS
If you don't care which point is selected, you can use this small PyQGIS script. Paste into a blank editor in the Python Console, change the layer names in the first two lines to match your layer ...
- 13.6k
5
votes
Selecting only one point in polygon using QGIS
With the "Select by expression tool you can use
array_first(
array_agg(
$id,
group_by:=overlay_intersects('polygons', $id), -- replace 'polygons'
filter:=array_length(...
- 24.9k
4
votes
Calculating mean value for points within polygon in QGIS
There is a possibility using a "Virtual Layer" through Layer > Add Layer > Add/Edit Virtual Layer....
Let's assume there are two layers one with points called 'points_example' (green) ...
- 23k
4
votes
Selecting only one point in polygon using QGIS
To add some performance improvements to @Ben W's answer by using a spatial index and a break command:
point_lyr = QgsProject.instance().mapLayersByName('points')[0]
poly_lyr = QgsProject.instance()....
- 24.9k
4
votes
Selecting only one point in polygon using QGIS
One way to do it would be:
First do a "Join Attributes by location" (Vector -> Data Management Tools) with your points as the Base Layer, your polygons as the Join
Layer, "within&...
- 136
3
votes
Calculating mean value for points within polygon in QGIS
Solution 1
Using the data you provided, I get meaningful results using Join Attributes by Location (Summary), see screenshot below and be sure to make settings accordingly.
Solution 2
Another option ...
- 40.1k
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