Swiss population density versus that of cities

The Swiss population has grown more or less steadily over the last decades:

With a current growth of about 1%, the Federal Statistics Office has forecast that Switzerland should have welcomed the 8 millionth inhabitant at some point this summer (jeez, I remember learning at school that Switzerland has 6.5 mio. inhabitants – you can check above where that puts me on the graph).

Now, Switzerland as a country is relatively heterogeneous, topographically speaking, with the Alps in the south. So it would be hard to spread out built-up areas evenly:

Yet, as an experiment I have taken data about some well-known, diverse, international cities and have computed the area that would be needed to house the entire Swiss population of 8 millions (give or take) at the cities’ population densities. Lo and behold, how compact, in fact, Switzerland could be (if we only wanted hard enough;  or click here for a pdf in A3 format or here for a bigger graphic:

Switzerland as a City State?“: How big an area would be needed to house the population of Switzerland, at population densities of various cities around the world (click to view high-resolution image)

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