Peuplement: Simulation of Size Differenciated Urban Growth
Author of the model: Jean-Luc BONNEFOY (University of Aix-Marseille, France)
Creation date:
initial: 2001
of this version: 2001
Starting from a pattern of cities of identical sizes, the model shows differentiated urban growth in a space where the flow of migrants is either constant or variable. The model is of interest because it shows the relative speed with which urban differentiation emerges with respect to two variables:
the role of the positions (rank) of the cities,
the wages.
The model does not integrate spatial differentiation, but it shows how it appears through the interactions of agents’ behaviours. Behaviours depend on on representations that migrant agents build up.
Theoretical references: Multi-agent systems, individual behaviours, representations
Inputs
Values, tables
Images
Outputs
Values, tables
Maps
Moving images or maps
To Download the Peuplement model:
First download the software package Starlogo 1.2
- The software package Starlogo 1.2 is the property of MIT and must be downloaded by each user individually from : http://www.media.mit.edu/starlogo/
Second: download the Zip file which contains the files necessary to run Peuplement using the Starlogo software
Remarques
The model is calibrated through 11 parameters:
"individus" (number of migrants)
"lieux" (number of cities)
"population_moy" (mean number of inhabitants of the whole area at a time t)
"revenu_moy" (mean income per inhabitant of the whole area at a time t)
"count-indiv" (gives the number of migrants)
"duree_rech" (number of periods of time that the search for the richest city can take)
"duree_aleat" ("0"="duree-rech" is identical for all migrants; "1"="duree-rech" is five plus a random increment)
"part_flux" ("0"=a migrant who enters a city is not replaced; "1"=the opposite case)
"temps_simu" (control of the duration of the simulation)
"frontiere" ("0"=no boundary;"1"=boundary(blue))
"rotation" (gives the random direction of travel taken by migrants).
A file "Aide_prog_peuple3.txt" describes the model. It contains the following information (in French):
- Qu’est-ce que c’est (definition of the model)
- Comment l’utiliser? (operating instructions for the program)
- les éléments à noter (points to note)
- des explorations possibles (exploratoration possible)...
Additional information is available at the following adresses:
http://www.up.univ-mrs.fr/bonnefoy
http://www.up.univ-mrs.fr/bonnefoy/informations/publications.html
Key word(s) linked to this articleDomain of application » urban
Formalisation » rules
Types of modelling » research
Software » download
Temporal characteristics » discrete
Optimisation/Simulation » simulation
This article last updated Tuesday 25 January 2005. by Sébastien Grandjean, Richard Stephenson, Cécile Tannier