Tuesday, February 9, 2016

Share of the population living in the largest Metro Area

The chart was created by Aron Strandberg, who has a great Twitter account with lots of demographic data visualization. The data comes from the World Bank (here and here). I've included some related links below.

Related Links:
  1. If Christaller had Google Earth
  2. Urban Primacy
  3. Urban Primacy in Latin Ameria
  4. Demographic evolution of cities, 1950-2025
  5. The Urban Observatory

Monday, February 8, 2016

off-topic: Explore & compare place names from 13 countries

Open Data Zurich points out to this interactive application to explore names of places in 13 countries. The data comes from OpenStreetMap.

On a curious note on the catholic roots of Brazil, a bit over 10% of all 5565 municipalities in Brazil are named after a saint. This proportion is less than 1.5% in Italy.


Saturday, February 6, 2016

Urban Picture

A road sign found in Stockholm, Sweden on February 2nd 2016 (via The Economist). Brave new world :)

credit: The Economist

Friday, February 5, 2016

Historical international immigration to the US 1850-2010

John Weeks points out to this interactive map of international immigration to the US, based on population census data (1850 - 2010) .

This is probably one of the nicest dataviz of migration patterns I've seen and yet this is just one piece in a much broader project to build an atlas of the US History at the Uni. of Richmond.

Wednesday, February 3, 2016

Pedestrian fatality risk as function of car impact speed

quick post today: Mikefc has created a very nice interactive chart showing pedestrian fatality risk as function of car impact speed using multiple risk models. Some of you might find it useful, specially for those involved in discussions/studies on road speed limits.

Sunday, January 31, 2016

The Price of Anarchy in Transportation Networks

Great paper with an interesting application of Braess’s paradox to transportation: closing roads can reduce travel delays.

Youn, H., Gastner, M. T., & Jeong, H. (2008). Price of anarchy in transportation networks: efficiency and optimality control. Physical review letters, 101(12), 128701.

Uncoordinated individuals in human society pursuing their personally optimal strategies do not always achieve the social optimum, the most beneficial state to the society as a whole. Instead, strategies form Nash equilibria which are often socially suboptimal. Society, therefore, has to pay aprice of anarchy for the lack of coordination among its members. Here we assess this price of anarchy by analyzing the travel times in road networks of several major cities. Our simulation shows that uncoordinated drivers possibly waste a considerable amount of their travel time. Counterintuitively, simply blocking certain streets can partially improve the traffic conditions. We analyze various complex networks and discuss the possibility of similar paradoxes in physics.
Hyejin Youn also has some more recent and equally interesting papers on urban scaling laws, in case you're interested.

credit: Youn et al (2008)

Related paper:

Friday, January 29, 2016

Getting updates from this blog

Dear readers, if you like this blog, recommend it to your friends. If you didn't like this blog, recommend it to your enemies. That's fine also.

If you want to receive our updates, you can do this using 3 different alternatives:

1 - Twitter: 

2 - Facebook page:  

3 -  Subscribe to our RSS Feed in a reader. I'd strongly encourage you to use Feedly

Thursday, January 28, 2016

Household composition in London: age and spatial distribution

This is a quite nice way to put a lot of info in a concise and beautiful figure. It comes from ‘The Information Capital’, a book by James Cheshire and Oliver Uberti.

click on the image to enlarge it

Monday, January 25, 2016

PhD Feelings

This is how doing a PhD can feel in one image

via Gif Porn