I have a question that I believe is similar to Count points in polygon grouping by attribute using PyQGIS but not really the same, as I would like to do it without PyQGIS and also have the information added in one of the original layers, instead of a new one.
In my case, I have a point-layer which contains several points with a lot of data (columns). There is one column that is most significant, as I need the points classified according to that column.
I also have a polygon-layer containing a buffer.
I now wish to count the points within each polygon and I want the count and classification to be added (in the original buffer-layer if possible), so that each class gets its own column, which then contains the count for this particular class in the buffer.
If the buffers overlap and the point falls into several buffers, the point should count for each buffer.
EDIT: What I meant with the last statement: When 1 point falls into 3 buffer-polygons for example, I would like each polygon to recognise the point and note down "1", instead of perhaps just couting it once for the first polygon and then ignoring it for the other polygons, or counting it thrice for one polygon and not at all for the other overlapping polygons.