Paolo Masucci, Kiril Stanilov, Michael Batty
posted by Matúš Medo
(26 June 2012)
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(141 views, 108 downloads, 1 comments )
By analysing the evolution of the street network of Greater London from the
late 1700s to the present, we are able to shed light on the inner mechanisms
that lie behind the growth of a city. First we define an object called a city
as a spatial discontinuous phenomena, from clustering the density of street
intersections. Second, we find that the city growth mechanisms can be described
by two logistic laws, hence can be determined by a simple model of urban
network growth in the presence of competition for limited space.
The Econophysics Forum
welcomes your comments
This patterns identified in this paper, and the seeming strong regularities, are intriguing (intriguing enough to vote for the paper!). However, I have some questions and critical comments.
The logistic model appears to be introduced post-hoc after observing the data, but that isn't entirely clear. In any case, it would be interesting to know what historical land-use laws might have been in place. Has the only constraint been placed by the green-belt movement? Also, circa 1700 the city structure was strongly influenced by the ideas of one man--Robert Hooke--who laid out much of the city after the Great Fire. How much did his plan constrain and shape future development?
More generally, it would be interesting to see a discussion of theories of urban growth, and whether these results either support or fail to support those theories. The paper refers to some of the literature, and a fuller discussion would be interesting to see, especially of recent work (e.g., Herold et al., 2003: http://www.sciencedirect.com/science/article/pii/S0034425703000750).