The latest outputs from researchers, alumni and friends at the UCL Centre for Advanced Spatial Analysis (CASA).
Robert Gordon of Northwestern University argues that we are coming to the end of more than 200 years of rapid growth in GDP. The third industrial revolution after steam which was the first, and electricity and chemistry, the second, and … Continue reading →
Continue reading »Interactive version (currently Chrome or Safari only) A basic algorithm to calculate the shortest path through random networks between 2 nodes (without passing the same node twice). Networks with a higher ratio of connections to nodes (especially where connections cross each other) contain exponentially more possible paths. The algorithm uses a recursive nested logical process […]
Continue reading »Dave Banister’s group at Oxford have just started a seminar series on new approaches to transport and mobility modelling called “Modelling on the Move” and two of us from UCL, myself and Peter Jones from the Centre for Transport Studies talked … Continue reading →
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This is a view from the LondonTown Christmas Map. While […]
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I was prompted by the excellent Twitter Tongues map, where geolocated tweets in London (including mine, and those from hundreds of thousands of others) were mined by Ed Manley over the summer, and then mapped by James Cheshire, to see … Continue reading →
Continue reading »TweetESRC Studentships at the London School of Hygiene and Tropical Medicine We are accepting applications now for social science and public health PhD and MSc funding ESRC 1+3 studentships are available in the Faculty of Epidemiology & Population Health and theFaculty of Public Health & Policy for social science research in the following areas: Demography – Demography & Health; […]
Continue reading »Over the last few weeks I’ve been building systems to collect realtime city data including tubes, buses, trains, air pollution, weather data and airport arrivals/departures. Initially this is all transport related, but the idea is to build up our knowledge of how a city evolves over the course of a day, or even a week, …
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How is that a niche research area such as the shape and form of cities using various mathematical and formal principles in geometry, allometry, scaling and social physics can have several distinct approaches that never refer to one another? Fractals … Continue reading →
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We develop a new algorithm for population synthesis that fuses remote-sensing data with partial and sparse demographic surveys. The algorithm addresses non-binding constraints and complex sampling designs by translating population synthesis into a computationally efficient procedure for constrained network growth. As a case, we synthesize the rural population of Afghanistan, validate the algorithm with in-sample and out-of-sample tests, examine the variability of algorithm outputs over k-nearest neighbor manifolds, and show the responsiveness of our algorithm to additional data as a constraint on marginal population counts.
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We develop a new algorithm for population synthesis that fuses remote-sensing data with partial and sparse demographic surveys. The algorithm addresses non-binding constraints and complex sampling designs by translating population synthesis into a computationally efficient procedure for constrained network growth. As a case, we synthesize the rural population of Afghanistan, validate the algorithm with in-sample and out-of-sample tests, examine the variability of algorithm outputs over k-nearest neighbor manifolds, and show the responsiveness of our algorithm to additional data as a constraint on marginal population counts.
Full Reference:
I attended a one-day workshop last week, hosted by IFSTTAR’s GERI Animatic research group at École des Ponts ParisTech just east of Paris. The workshop was on Bicycle Sharing Systems, and as I have recently been working with a couple … Continue reading →
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The London Blitz, from 1940-1941, was a traumatic event […]
Continue reading »“In the next century, planet earth will don an electronic skin. It will use the Internet as a scaffold to support and transmit its sensations. This skin is already being stitched together….. “. This comment from Harvard’s Cherry Murray, Dean of Engineering … Continue reading →
Continue reading »The 2001 Census used a different set of Output Areas (OA) than the current 2011 boundaries; reflecting changes in the spatial distribution of the underlying population. For example, if an area has become more heavily populated since 2001, it makes sense that a previous OA might be split into multiple new segments. The ONS have provided […]
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The 2001 Census used a different set of Output Areas (OA) than the current 2011 boundaries; reflecting changes in the spatial distribution of the underlying population. For example, if an area has become more heavily populated since 2001, it makes sense that a previous OA might be split into multiple new segments.
The ONS have provided both the Shapefiles and lookup tables for these changes, however, as yet, I haven’t seen any maps of these changes.
I have had a go at creating these in a reproducible way using R – the code with links to all the data (which is public domain) can be found on my Rpubs page. At the base of the Rpubs post are links to downloadable PDF maps of all local authority districts in England and Wales.
A recurring pattern that will become clearer when the high resolution census data become available in 2013, is the splitting of OA in the centre of many large urban areas, typically as a result of increased population density. A couple of direct links to maps are as follows:
For the remaining maps and R code, see the Rpubs page.
Map Shows Common Twitter Names Across LondonLondonistMuhammad Adnan from UCL's Centre for Advanced Spatial Analysis (CASA) has chewed up 4 million geo-tagged tweets from London, spat out the commonest user names and plotted them on a map. Different…
Continue reading »One of the most recognisable visualisation techniques used by LSE Cities in the Urban Age publications is the 3D density map- an intuitive and engaging way to represent built form, and enable comparison of very different city environments across the globe. I’ve been producing 3D density maps in my own research for around five years … Continue reading →
In case you hadn’t noticed, the ONS released their latest tranche of Census 2011 results today. The data has received considerable fanfare in the media already, looking set to dominate political debate over the coming days. One big story that appe…
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Tracking gene flow in marine plant evolutionEureka! Science NewsPaolo Masucci from the Centre for Advanced Spatial Analysis, at University College of London, UK, and colleagues identified the segregation of genes that a marine plant underwent during it…
Continue reading »Tracking Gene Flow in Marine Plant EvolutionScience Daily (press release)Paolo Masucci from the Centre for Advanced Spatial Analysis, at University College of London, UK, and colleagues identified the segregation of genes that a marine plant underwent …
Continue reading »Tracking Gene Flow in Marine Plant EvolutionScience Daily (press release)Paolo Masucci from the Centre for Advanced Spatial Analysis, at University College of London, UK, and colleagues identified the segregation of genes that a marine plant underwent …
Continue reading »Tracking gene flow in marine plant evolutionNanowerk LLCPaolo Masucci from the Centre for Advanced Spatial Analysis, at University College of London, UK, and colleagues identified the segregation of genes that a marine plant underwent during its evolut…
Continue reading »You know you’ve attended a good conference when the discussion leaves your head buzzing with new ideas and possibilities, and the debate continues long after the event closes. This was certainly the case at the Urban Age Electric City conference last week, where politicians, academics, designers and technologists met to share, discuss and argue urban … Continue reading →
Tracking gene flow in marine plant evolution Science Daily
Continue reading »We will all be living in cities by the end of this century (see EPA, 2011) and for the most part, cities will constitute a complex web of local-global relationships that defies our present understanding. On this way to the … Continue reading →
Continue reading »TweetKeynote Speakers on Ageing and Population Decline – 7th International Conference on Population Geographies, Groningen, The Netherlands, 25-28 June 2013 Dear Colleagues, We proudly announce two Keynote Speakers for the 7th International Conference on Population Geographies: Professor Sarah Harper – “Rethinking Global Ageing” Professor Harper is Director of the Oxford Institute of Population Ageing. Dr. Cristina Martinez-Fernandez – […]
Continue reading »TweetRGS-IBG Annual International Conference 2013 New geographical frontiers 28 to 30 August 2013, at the Royal Geographical Society (with IBG) in London ========================================== Call for Sessions and Papers ========================================== The Royal Geographical Society (with IBG) is pleased to announce that the Call for Sessions and Papers has opened for its Annual International Conference 2013 […]
Continue reading »We had the first snow of the Winter in London this morning, around 07:30 and lasting no more than half an hour. I’ve been building the data layer for the iPad video wall, so switched the National Rail data collection on once I got to work around 09:50. The idea was to collect data to …
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Recently, I attended a meeting with people from a community that is concerned with vibration and noise caused by a railway near their homes. We have discussed the potential of using citizen science to measure the vibrations that pass the sensory threshold and that people classify as unpleasant, together with other perceptions and feeling about […]
One more post on GPS traces from taxis, this time from San Francisco. The video follows the origins (green dots) and destinations (red dots) of passenger trips made by taxi in San Francisco. It is based on GPS traces from 500 taxis over a full month.&n…
Continue reading »One more post on GPS traces from taxis, this time from San Francisco. The video follows the origins (green dots) and destinations (red dots) of passenger trips made by taxi in San Francisco. It is based on GPS traces from 500 taxis over a full month.&n…
Continue reading »One more post on GPS traces from taxis, this time from San Francisco. The video follows the origins (green dots) and destinations (red dots) of passenger trips made by taxi in San Francisco. It is based on GPS traces from 500 taxis over a full month.&n…
Continue reading »I recently began a new job at LSE Cities and have been working for the last month on materials for the Electric City conference in London, taking place on the 6th and 7th December this week. The conference will be exploring smart cities and disruptive urban tech from a sociological slant, and includes talks from … Continue reading →
TweetPhD Studentship in Human Geography Contemporary European Diasporas in Wales Supervisors Dr Rhys Dafydd Jones (Institute of Geography and Earth Sciences, Aberystwyth University) Professor Rhys Jones (Institute of Geography and Earth Sciences, Aberystwyth University) The studentship is supported by the ESRC Doctoral Training Centre for Wales and will involve opportunities for engagement, networking, shared training and possible […]
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Here is a webpage that uses my own CityDashboard API*, to build a Periodic-Table inspired “data artwork” of live London information, as a series of coloured square panels on a website. The squares update regularly with fresh information, and throb … Continue reading →
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