The Cartography of Riots


The riots of August 2011 took the nation by surprise. Consternation followed as events appeared to spiral out of control, then condemnation. Later reflection, and the compilation of hundreds of statistics on the rioters who were convicted. Much was also written about those who were not caught but were interviewed, as well as on the severity of the sentences handed down to the minority of rioters who were caught, or identified and convicted. Prison sentences totalling more than 1,800 years were handed down with an average custodial sentence of nearly 17 months (more than four times the average term handed down by magistrates courts for similar offences).
Court cases related to the August 2011 riots in England Continue reading

The London Housing Bubble

Political InsightIn an article for the “In Focus” section of Political Insight (April 2014, Volume 5, Issue 1) Danny Dorling and I looked at the overheating of the housing market in London. The graphics that I created for this feature visualise the considerable changes that took place in recent years using data from an analysis reported in the Guardian: In 2012, the total value of residential property in London was reported to be £1.37 trillion. The value of housing in the capital dominated the UK housing market. By 2013, the value of London housing had risen to £1.47 trillion. Some £100 billion had been added in just one year, an additional £30,000 per property if the rise had been evenly spread out across the capital. However, just as within England, this increase was concentrated within certain areas, particularly those closest to the centre.
When London is redrawn with each borough sized according to the value of residential property, the largest borough becomes Kensington and Chelsea where the average home now costs £1.57 million. Westminster, with more housing but an average value of ‘only’£1.1 million is almost as large. Wandsworth, more typical at £527,000 a home, is more than three times the size of Newham despite having just 30 per cent more homes. However, even in Newham, the ‘cheapest borough’, the average property now sells for over £218,000.

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London Borough Elections 2014

The London borough elections were held on May 22nd. A total of 1851 council seats (and also four mayoralties) were contested in 32 of the 33 boroughs in the British capital. The following map series produced for the Londonmapper Project shows the distribution of 1843 of the seats in the local councils as published on the London Councils election website (five seats in Tower Hamlets were still missing from the results, while the remaining seats are elected at postponed elections in a few of the wards). The maps show the individual distribution for each of the five main parties, i.e. Labour, Conservatives, Liberal Democrats, UKIP and Green Party (in order of their total number of seats) as well as Others (which are independent candidates as well as groups that only stood in individual borough, such as Tower Hamlets First who won 18 seats there). These are the new political shapes of London after what has been a small political earthquake in the country:

London Borough Elections 2014 - Vote Distribution
(click for larger version)

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Hedgehogs and beyond: Introducing Londonmapper

LondonmapperGood things come to those who wait. Today we are officially launching the Londonmapper website, a project that I started working on following the completion of my PhD in 2011. Over the past 2 1/2 years we developed the scope of the project which aims to become a new Social Atlas of London, a project that has not been undertaken since Shepherd et al’s work in the 1970s. But it wouldn’t be me if this would be an ordinary mapping project. Londonmapper is a growing collection of all kinds of cartograms that map a wide range of data to give a comprehensive picture of the diversity in the city. Continue reading

Londonmapper goes #geomob: Visualising London with Cartograms

Today I was invited to give a presentation at the quarterly #geomob meetup for location based service developers which this time took place at the Google Campus in East London. In my talk I gave a short preview of the Londonmapper project that I am working on with my colleagues and the Trust for London. Unfortunately technology played some tricks on us and some of the animated bits and content did not show up during the presentation, so that I promised to put these on my blog alongside the slides of the talk. Here we go…
This first animation was an introduction into showing how cartograms work in general. I used a gridded population cartogram animation for Great Britain which I created years ago, demonstrating the approach of using a gridded cartogram to allow other layers being used in the transformed map. The following map (which is rather drafty as it was only a conceptual exercise) shows Great Britain overlaid with a topographic layer indicating the land elevation, as well as some key rivers and a selection of the motorway network. During the animation this map transforms from a conventional land area map into a gridded population cartogram where each grid cell is resized according to the total number of people living there. While the grid cells change their size, the other geographic layers are changed accordingly, so that the final cartogram shows these layers in relation to the population distribution, i.e. at which elevations do people live and how are people linked to major roads. The animation also demonstrates the magnifying lens effect in the most densely populated areas. Motorways and even the curvy shapes of the river Thames become visible now which at such a scale cannot be seen from a normal map. Gridded cartograms hence help to highlight details in these areas that are most relevant in the transformed space.

Gridded Cartogram Animation of Great Britain
(click for larger version)

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