I have a layer consisting of points (big stones), and there are too many points to be able to show them all in the scale I am using in my print composer.
What is the most efficient, and preferably least processor heavy, way to tell QGIS to only show a point, if there is no other point in the same layer which is closer than, say, 50 meters, from another point in that layer. There is in this case no preference which stone to show and which to not show, ie I have no data telling for instance which stones are bigger or more important.