I am mapping various archaeological sites as points; as this is a very rough map, some of the sites share the same coordinates. The points are categorized by the type of site (as "category 1", e.g. settlement, fortifications sanctuary, necropolis etc.). Sometimes, at a single location there are multiple points/datasets per category, like multiple types of fortifications ("category 2"). I chose Point Displacement to declutter the symbols, as seen below. In a next step I just want to show only one symbol per category 1.
In the example below there are three types of fortifications (the tower symbol), like actual towers, walls, fortresses etc. But I just want it to display a single tower-symbol to show that there are fortifications in general (not showing all of them).
Is there any way to do this?