A Week in the Life of London’s Public Transit System

I’ve been meaning to post this for ages but have had a great deal on my plate (more posts and visualisations to follow in the next week I hope) so this has kept slipping, together with the six or seven other ‘draft’ posts I’ve got going. Anyway, this visualisation shows average entries at each and every Underground, […]

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Modelling Movement in the City: The Influence of Individuals

‘Modelling Movement in the City: The Influence of Individuals’ was the title of a talk I gave at the AGILE conference in Avignon, France last week. For the conference I actually initially prepared a poster that never ended up seeing the light of d…
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The Twitter Languages of London

Last year Eric Fischer produced a great map (see below) visualising the language communities of Twitter. The map, perhaps unsurprisingly, closely matches the geographic extents of the world’s major linguistic groups. On seeing these broad patterns I wondered how well they applied to the international communities living in London. The graphic above shows the spatial …

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Geospatial Science Seminar 07.02.2012

Creating a new Output Area Classification.
Chris Gale, UCL Department of Geography.

To download a PDF of the seminar please click here.

To download a PowerPoint Slide Show of the seminar please click here.

The current Output Area Classif…

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London Cycle Hire and Pollution

As a cyclist in London you can do your best to avoid left turning buses and dozy pedestrians. One thing you can’t really avoid though is pollution (although I accept cyclists probably aren’t much worse off than pedestrians and drivers in this respect). To illustrate this I have taken data for 3.2 million journeys from …

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Geospatial Science Seminar 24.01.2012

GIS solutions for London’s Crossrail. Wayne Marsh, Crossrail. Abstract. Crossrail is the largest civil engineering project in Europe and the largest single addition to the London transport network in over 50 years. It has been designed to provide a new railway network for London and the South East and carry 200 million passengers a year. Within Crossrail, GIS is being used through the entire lifecycle of the project, including design, construction and maintenance, integrating and joining up data such as BIM and Asset Registries. At the heart of the GIS solution is an Oracle Spatial 11g server acting as the master repository and spatial analysis tool, glueing the information together. This talk will discuss how Crossrail arrived at this solution, how it is currently being used and how we plan to enhance it in the future. To download a PDF of the seminar please click here. In addition, here are some facts about Crossrail that @oobr tweeted during the seminar: – Crossrail is so vast that has its own coordinate reference system – London Survey Grid. British National Grid was not accurate enough. – Crossrail route has to weave through not just existing tube lines but also the post office […]

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London Population Change 2001 to 2009

In a previous post I talked about the Index of Multiple Deprivation (IMD) in London, and how a “standard” representation only reflects the geographical reality of the land. By utilising a cartogram tool this potential issue can be overcome by rescaling each areal unit by its resident population, for the IMD I used mid-year population estimates available from the Office for National Statistics at Lower Layer Super Output Area (LSOA) level. To add a layer of context to the previous maps, I have constructed cartograms for London to illustrate the change in population between 2001 and 2009. I have used 2001 census data along with 2009 mid-year population estimates to calculate the percentage change for each of the 24,140 output areas (that contain on average 250 individuals nationally) that make up Greater London for the age ranges: 0-4, 5-14, 15-24, 25-44, 45-64 and 65 and over. To create the cartogram aspect of the maps I have used the total population of that particular age range in 2009 to rescale each areal unit. I have also produced the same population change maps using the “standard” representation of London to allow comparison with the cartograms. The results of this can be seen […]

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The Power of Comparison: Just How Big Is It?

  If I said a country was 1594719800 metres squared it would mean a lot less to you than if I said it was about the size of Greater London (so long as you know about how big Greater London is). For this reason the media tend to report the extent of a flood in …

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Just how far can the Tube take you?

Transport for London have just released their performance data (link here) for the London Underground network. It is in the form of a really detailed file that contains, amongst other things, the “Peak Operated Kilometres” and “Peak Passenger Journeys” for the past 6 years or so. If you total the distances covered by the Tube …

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