
In the first row you see the 20 largest metropolitan areas. See also http://en.wikipedia.org/wiki/List_of_metropolitan_areas_by_population
The blue circle shows the population, the brown circle the area. The parameters for the circles are always the same, but calculated by my own algorithm to show you the relationship. The numbers in the first row are the ranking in relationship to population. Biggest metropolitan area is Tokio, with more than 32,000,000 people. In comparison, number 4 is New York. Around 20,000,000 people, but with more space than Tokio. Have a look to number 5. It's Mombai in India, same population like New York, but really less space. You can't see a brown circle. There is no space for people. See also Kolkata - India number 14 , Cairo - Egypt number 16 and Karachi - Pakistan as number 20 .
The second row shows the city areas. It's different to the metropolitan areas, because without suburbs. See also
http://en.wikipedia.org/wiki/List_of_cities_by_population

37,000 people each square km means each person has only 27 square m as space to live. Streets to drive and parks to walk are included. London City are 213 square m each person.

Interesting about density. You see, number 3 till to number 7, are cities of India.
Also the growth rate in these cities are very high. But the highest growth rate has Lagos in Nigeria. 429,870 people each year, equal 4,45 %. The second is also a africa country, Kinshasa with 4,24 %, 336,232 people. The third, Dhaka in Bangladesh is just the second in density.
Now, please think not in population, please think in cars which they want sooner or later!

Let's have a look to our city experience. First have a look to Dunedin.

Each people in Dunedin has a average area of 27,000 square m. You remember? Cairo has 27 square m each person.

I'm often in Zurich. Because I'm teaching at the university. Isn't it interesting, that Zurich has near the same density of population like Tokio or Seoul. I can't believe it, because Zurich is such a beautiful city. But, it's true, the traffic is sometimes a horror. Perhaps, Zurich could be a test field for vehicles which could be use in Tokio or Seoul. And, let's have a look to other small cities which could be a test field. Which part of Dunedin could be a test field for other dense urban aeras?
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