Wednesday, March 4, 2015

Mapping the Transit System of Rio with GTFS data

Here is my first experience mapping a transit system using GTFS data!

The map shows the bus public transport system of the city of Rio de Janeiro as of November 2014. The blue lines represent the bus routes, where color intensity and width vary according to service frequency per day. I have also included the city's street grid in the background (gray) to give a visual idea of the transport system coverage.

click on the image to enlarge it

The map was created in R (ggplot) using data from OpenStreetMap (OSM) and GTFS data provided by Fetranspor/Va de onibus (this is basically the same transit data people have access to in their mobile apps). This great map by James Cheshire was the main inspiration, although I couldn't get to such a nice result as James did.

I've created this map a couple of months ago but still need to organize the R code before sharing it here with you. I am also working on an interactive version of this map, but this may take a little longer  I've been facing some deadline issues lately  Stay tuned.

Related Links

Monday, March 2, 2015

Air pollution in Asian Cities

China is internationally famous for its bad air quality. So I was quite surprised to know that India has even higher levels of air pollution in many cities.

ps.  Angel Hsu has pointed out to this interactive map showing the air pollution levels in some Chinese cities in 2014. Data comes from the Ministry of Environmental Protection and you can download it here.

Sunday, March 1, 2015

Visualizing Time

Andy Kirk (who runs this great website) has organized an amazing collection of beautiful and insightful data visualizations of time. Check it out.


Wednesday, February 25, 2015

4th Global Conference on Economic Geography 2015, Oxford

The School of Geography and the Environment and The Smith School of Enterprise and the Environment at the University of Oxford are organizing the 4th Global Conference on Economic Geography to be held in Oxford on 19-23 August, 2015. It promises to be a good event.

Graduate students outside Europe may apply for funding to attend the conference, here.

ps.  If you are coming to the conference and would like to have a chat over coffee or tea beer, drop me a line.

Tuesday, February 24, 2015

Friday, February 20, 2015

An Agent-Based Simulation of the Urban Growth in Latin American cities

Barros, Joana (2012). Exploring urban dynamics in Latin American cities using an agent-based simulation approach. In Agent-based models of geographical systems (pp. 571-589). Springer Netherlands. [Ungated version here, and PhD Thesis here]

This paper focuses on a specific kind of urban growth that happens in Latin American cities, called 'Peripherisation'. This is characterised by the formation of low-income residential areas in the peripheral ring of the city and a perpetuation of a dynamic core-periphery spatial pattern. The dynamics of growth and change in Latin American cities are explored using agent-based simulation. The objective is to increase the understanding of urban spatial phenomena in Latin American cities, which is essential to providing a basis for future planning actions and policies. Simulation exercises were used to revisit assumptions about urbanisation issues in Latin American cities and investigate important aspects of growth and change in these cities. These exercises allowed the problem of urban growth in Latin American cities to be unfolded through their dynamics, relating these dynamics to urban morphology, and thus presenting a new and important perspective on the phenomenon.