I have a point layer in QGIS. Each point represents a tree and each tree has information about its height as an attribute. I would like to build a query/expression to select all those trees that have an other tree higher than 7 meters within their 20-meter-buffer (20 meter radius).
I managed to do this "manually" by creating a 20-meter-buffer around all trees higher than 7 meters (after the selection of the trees higher than 7 meters) and then selected the ones within the buffer but I was wondering if its possible with a query/expression. (maybe with a bit more complex one)
Unfortunately I do not have PostGIS so this should be done with Select by expression or Query Builder if possible.
(It would be also helpful to know if it's simply impossible)