is it possible in QGIS to query a layer with data from another layer?
And if so ... how is the syntax for that?
Usecase: I have a lot of image-position points and a lot of monitoring sites.
I would like to set the monitoring area layer, so that it only shows areas where we also have images for this year.
I then use the extent of the monitoring area as the coverage layer to render my image-position maps with the Atlas plugin.
Without querying the areas to reduce them, i get a lot unneccesary maps with no image-positions, so i want to get rid of those areas which do not match (and of course not manually)
So, is there kind of a query to find out if a value in table1 column xy exists also in table2 column xy ?