I'm trying to classify a set of buildings (grey) in a layer, according to construction year, in a number of different areas (orange).
In Orange – areas with a sum of buildings inside.
The construction year information is inside the area’s layer… Ok, so I think this is a problem with data display, because all my data is organized like this:
So for Area D, there are 18 buildings built in 1940, and so on…
How can I classify this information to calculate maximum and show inside of each area what the most represented year is?