Very nice visualization, bit slow animations but overall it was informative and looked well! It seems they're getting the data from the catastral (official gov

Very nice visualization, bit slow animations but overall it was informative and looked well! It seems they're getting the data from the catastral (official goverment data), I wonder how accurate this is? Not sure how it is in other cities around in Spain, but in Barcelona there are a ton of illegal atticos and other addons to buildings, which would add more height to the building in real life compared to the visualization. After a quick look, I could see at least two buildings I know are taller than what the visualization says (the building next door is the same height in the visualization, but has one more floor when you see the building in real-life).