Ackchually, that is a map of density of the United Kingdom. Nowhere on this map does it show the density of maps found in the UK. :P
It's not, though:
Pop. Density = Persons / km²
Map Density = Maps / km²
They get a little closer to each other if you count phone-based maps, but with the existence of physical maps, they will almost always be different.
In the centre, Hyde park and St. James park I expect.
In the south west, Richmond Park + Bushy Park + Old Deer Park + Kew gardens all in close proximity to each other.
They seem to have a lot of maps around London! Must be those tourist maps that they give away for free to tourists.
Funny that some areas dont seem to have maps at all though!
