#trees per person probably is a better metric. Band-filtered population density, as that filters out high frequencies due to local peaks and low frequencies that denote average wealth of a larger neighborhood, may be an even better one. I guess that might even work for extremely high-rise building as in Dubai. Firstly, the lower floors in such buildings typically are offices, and secondly, I guess the really high buildings will stand less close to other high buildings than the lower skyscrapers that surround it.
#trees per person probably is a better metric. Band-filtered population density, as that filters out high frequencies due to local peaks and low frequencies that denote average wealth of a larger neighborhood, may be an even better one. I guess that might even work for extremely high-rise building as in Dubai. Firstly, the lower floors in such buildings typically are offices, and secondly, I guess the really high buildings will stand less close to other high buildings than the lower skyscrapers that surround it.