The latest outputs from researchers, alumni and friends at the UCL Centre for Advanced Spatial Analysis (CASA).
In the past on this site we have written about how one can use social media to study the world around us. Often the focus has been on Twitter but that is not the only social media platform available. Another is Flickr, and while in past posts hav…
Continue reading »At the end of September 2021, I received an email from Nature Reviews Methods Primers (NRMP) with an invitation to lead a paper on citizen science. NRMP is a journal that commissions methodological papers on different topics, so they can be used by early career and experienced researchers, to learn about a new methodology and … Continue reading Nature Reviews Methods Primers paper on citizen science
Continue reading »Just a short post that say that Linda See and myself have a new editorial in Environment and Planning B: Urban Analytics and City Science entitled ” Leveraging Street Level Imagery for Urban Planning.” While in the in the past we have written abo…
Continue reading »Just a short post that say that Linda See and myself have a new editorial in Environment and Planning B: Urban Analytics and City Science entitled ” Leveraging Street Level Imagery for Urban Planning.” While in the in the past we have written abo…
Continue reading »Building upon our work on volunteered geographical information (VGI) and ambient geographic information (AGI) and how such data (e.g. social media) can be used to understand place, Xiaoyi Yuan, Andreas Züfle and myself have a new paper entitled: “A Th…
Continue reading »Building upon our work on volunteered geographical information (VGI) and ambient geographic information (AGI) and how such data (e.g. social media) can be used to understand place, Xiaoyi Yuan, Andreas Züfle and myself have a new paper entitled: “A Th…
Continue reading »In the past we have written extensively on Volunteered Geographic Information (VGI) such as OpenStreetMap or Twitter. However, we have not really explored Street View Imagery (SVI), well not until now. Within the realm of VGI, SVI has emerged in …
Continue reading »In the past we have written extensively on Volunteered Geographic Information (VGI) such as OpenStreetMap or Twitter. However, we have not really explored Street View Imagery (SVI), well not until now. Within the realm of VGI, SVI has emerged in …
Continue reading »Continuing our work on shootings we recently had a paper published in Criminology and Public Policy entitled: “Responses to Mass Shooting Events: The Interplay Between the Media and the Public.” However, here we do not look at bots but instead explore …
Continue reading »Continuing our work on shootings we recently had a paper published in Criminology and Public Policy entitled: “Responses to Mass Shooting Events: The Interplay Between the Media and the Public.” However, here we do not look at bots but instead explore …
Continue reading »In the past we have explored how social media can be used to delineate earthquakes, locate wildfires or be used to understand urban morphology. However, recently we have also started to explore how social media and crowdsourced data can be utilized to …
Continue reading »In the past we have explored how social media can be used to delineate earthquakes, locate wildfires or be used to understand urban morphology. However, recently we have also started to explore how social media and crowdsourced data can be utilized to …
Continue reading »In the past we have written about how one can use crowdsourced data to gain a collective sense of place from Twitter contributions and also from corresponding Wikipedia entries (e.g. here). In a new paper with Xiaoyi Yuan, we extend this work to explo…
Continue reading »In the past we have written about how one can use crowdsourced data to gain a collective sense of place from Twitter contributions and also from corresponding Wikipedia entries (e.g. here). In a new paper with Xiaoyi Yuan, we extend this work to explo…
Continue reading »Figure 1: Relation of computational social science of disasters (CSSD) with other fields.Past posts have discussed or demonstrated how computational social science (CSS) (i.e. the study of social science through computational methods) can be uti…
Continue reading »Figure 1: Relation of computational social science of disasters (CSSD) with other fields.Past posts have discussed or demonstrated how computational social science (CSS) (i.e. the study of social science through computational methods) can be uti…
Continue reading »About a year ago, the Adam Mickiewicz University in Poznań, Poland, hosted the PPGIS 2017 workshop (here are my notes from the first day and the second day). Today, four papers from the workshop were published in the journal Quaestiones Geographicae which was established in 1974 as an annual journal of the Faculty of Geographical and Geological … Continue reading Papers from PPGIS 2017 meeting: state of the art and examples from Poland and the Czech Republic
Continue reading »The second and last day of the conference (day 1 is covered here) started early, with a keynote: “Science society continuum: From ‘deficit model’ to social demand on research – the reform of science in progress” Lionel Larqué, FR – [physicist and head the collaboration of education, civil society organisations, and science. Influenced partnerships between science … Continue reading European Citizen Science Association (ECSA) 2018 Conference – day 2: Beyond the deficit model, inclusiveness, libraries, and
Continue reading »Notes from the European Citizen Science Association Conference in Geneva, 4-5 June. Welcome to the conference! Katrin Vohland, ECSA Vice Chair, (DE) – conferences started from volunteering by Science et Cité two years ago. ECSA has been growing through participation in projects, and this allows ECSA to do things such as the conference and other … Continue reading European Citizen Science Association (ECSA) 2018 conference – day 1: keynotes, education, and national & international programmes
Continue reading »A few weeks ago, the Global Facility for Disaster Reduction and Recovery (GFDRR), published an update for the report from 2014 on the use of crowdsourced geographic information in government. The 2014 report was very successful – it has been downloaded almost 1,800 times from 41 countries around the world in about 3 years (with more … Continue reading Identifying success factors in crowdsourced geographic information use in government
Continue reading »The following recording is from the Geothink & Learn lunchtime webinar. The call for the event stated: “Should it be only people with graduate degree who make extraordinary scientific discoveries? Maybe not. Citizen scientists around the world have contributed to new discoveries in fields such as astronomy, biology, meteorology, geography, public health, and more. It … Continue reading Geothink & Learn citizen science session
Continue reading »One of the lovely aspects of scientific research is its international dimension – the opportunity to collaborate with people from different places, cultures, and necessarily practices and points of view. During 2017, Dr Chnming Li, of the Institute of Urban Environment of the Chinese Academy of Science, was a visiting researcher in ExCiteS. Dr Li … Continue reading Participatory soundscape sensing – joint paper with Dr Chunming Li
Continue reading »The first week of the “Introduction to Citizen Science and Scientific Crowdsourcing” course was dedicated to an introduction to the field of citizen science using the history, examples and typologies to demonstrate the breadth of the field. The second week was dedicated to the second half of the course name – crowdsourcing in general, and its … Continue reading Citizen Science & Scientific Crowdsourcing – week 2 – Google Local Guides
Continue reading »Deadline 28th July 2017 UCL Department of Geography and the Ordnance Survey are inviting applications for a PhD studentship to explore the internal systematic biases in crowd-sourced geographic information datasets (also known as Volunteered Geographic Information – VGI). The studentship provides an exciting opportunity for a student to work with Ordnance Survey on understanding the … Continue reading PhD studentship in collaboration with the Ordnance Survey – identifying systematic biases in crowdsourced geographic information
The Citizen Science Association conference is held at the River Center in St Paul, Minnesota on 17th to 20th May. This post and the following ones are notes that were taken during the meeting in the sessions that I’ve attended. Wednesday was dedicated to workshops, and I joined the Citizen Science at College level workshop. Organised by Thomas … Continue reading Citizen Science 2017 – workshops day and opening panel
An aspect of collaborative projects is that they start slowly, and as they become effective and productive, they reached their end! The COST Energic (European Network for Research into Geographic Information Crowdsourcing) led to many useful activities, with some of them leading to academic papers. From COST Energic, we’ve got the European Handbook on Crowdsourced Geographic … Continue reading The Potential of Volunteered Geographic Information (VGI) in Future Transport Systems
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| Conceptual model for integrating social and physical constructs to monitor, analyze and model slums. |
Continuing our research on slums, we have just had a paper published in the journal Regional Studies, Regional Science entitled “The Study of Slums as Social and Physical Constructs: Challenges and Emerging Research Opportunities“. In this open access publication we review past lines of research with respect to studying slums which often focus on one of three constructs: (1) exploring the socio-economic and policy issues; (2) exploring the physical characteristics; and, lastly, (3) those modelling slums. We argue that while such lines of inquiry have proved invaluable with respect to studying slums, there is a need for a more holistic approach for studying slums to truly understand them at the local, national and regional scales. Below you can read the abstract of our paper:
“Over 1 billion people currently live in slums, with the number of slum dwellers only expected to grow in the coming decades. The vast majority of slums are located in and around urban centres in the less economically developed countries, which are also experiencing greater rates of urbanization compared with more developed countries. This rapid rate of urbanization is cause for significant concern given that many of these countries often lack the ability to provide the infrastructure (e.g., roads and affordable housing) and basic services (e.g., water and sanitation) to provide adequately for the increasing influx of people into cities. While research on slums has been ongoing, such work has mainly focused on one of three constructs: exploring the socio-economic and policy issues; exploring the physical characteristics; and, lastly, those modelling slums. This paper reviews these lines of research and argues that while each is valuable, there is a need for a more holistic approach for studying slums to truly understand them. By synthesizing the social and physical constructs, this paper provides a more holistic synthesis of the problem, which can potentially lead to a deeper understanding and, consequently, better approaches for tackling the challenge of slums at the local, national and regional scales.”
Keywords: Slums; informal settlements; socio-economic; remote sensing; crowdsourced information; modelling.
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| Framework for studying and understanding slums. |
Continue reading »Mahabir, R., Crooks, A.T., Croitoru, A. and Agouris, P. (2016), “The Study of Slums as Social and Physical Constructs: Challenges and Emerging Research Opportunities”, Regional Studies, Regional Science, 3(1): 737-757. (pdf)
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| Conceptual model for integrating social and physical constructs to monitor, analyze and model slums. |
Continuing our research on slums, we have just had a paper published in the journal Regional Studies, Regional Science entitled “The Study of Slums as Social and Physical Constructs: Challenges and Emerging Research Opportunities“. In this open access publication we review past lines of research with respect to studying slums which often focus on one of three constructs: (1) exploring the socio-economic and policy issues; (2) exploring the physical characteristics; and, lastly, (3) those modelling slums. We argue that while such lines of inquiry have proved invaluable with respect to studying slums, there is a need for a more holistic approach for studying slums to truly understand them at the local, national and regional scales. Below you can read the abstract of our paper:
“Over 1 billion people currently live in slums, with the number of slum dwellers only expected to grow in the coming decades. The vast majority of slums are located in and around urban centres in the less economically developed countries, which are also experiencing greater rates of urbanization compared with more developed countries. This rapid rate of urbanization is cause for significant concern given that many of these countries often lack the ability to provide the infrastructure (e.g., roads and affordable housing) and basic services (e.g., water and sanitation) to provide adequately for the increasing influx of people into cities. While research on slums has been ongoing, such work has mainly focused on one of three constructs: exploring the socio-economic and policy issues; exploring the physical characteristics; and, lastly, those modelling slums. This paper reviews these lines of research and argues that while each is valuable, there is a need for a more holistic approach for studying slums to truly understand them. By synthesizing the social and physical constructs, this paper provides a more holistic synthesis of the problem, which can potentially lead to a deeper understanding and, consequently, better approaches for tackling the challenge of slums at the local, national and regional scales.”
Keywords: Slums; informal settlements; socio-economic; remote sensing; crowdsourced information; modelling.
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| Framework for studying and understanding slums. |
Continue reading »Mahabir, R., Crooks, A.T., Croitoru, A. and Agouris, P. (2016), “The Study of Slums as Social and Physical Constructs: Challenges and Emerging Research Opportunities”, Regional Studies, Regional Science, 3(1): 737-757. (pdf)
I’ve mentioned the European Handbook for Crowdsourced Geographic Information in the last post, and explained how it came about. My contribution to the book is a chapter titled ‘Why is Participation Inequality Important?‘. The issue of participation inequality, also known as the 90:9:1 rule, or skewed contribution, has captured my interest for a while now. … Continue reading Published: Why is Participation Inequality Important?
COST ENERGIC is a network of researchers across Europe (and beyond) that are interested in research crowdsourced geographic information, also known as Volunteered Geographic Information (VGI). The acronym stands for ‘Co-Operation in Science & Technology’ (COST) through ‘European Network Researching Geographic Information Crowdsourcing’ (ENREGIC). I have written about this programme before, through events such as twitter … Continue reading New book: European Handbook of Crowdsourced Geographic Information
This past semester I gave a new class at GMU entitled “Urban Analytics”. In a nutshell the class was about introducing students to a broad interdisciplinary field that focuses on the use of data to study cities. More specifcally the emphasis of the cla…
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This past semester I gave a new class at GMU entitled “Urban Analytics”. In a nutshell the class was about introducing students to a broad interdisciplinary field that focuses on the use of data to study cities. More specifcally the emphasis of the cla…
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Following on with our GeoSocial Analysis work, we recently had a paper published in PLOS ONE entitled “Crowdsourcing A Collective Sense of Place.” In the paper we discuss and showcase how one can take a quantitative approach to derive a collectiv…
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Following on with our GeoSocial Analysis work, we recently had a paper published in PLOS ONE entitled “Crowdsourcing A Collective Sense of Place.” In the paper we discuss and showcase how one can take a quantitative approach to derive a collectiv…
Continue reading »There are several applications that allow creating forms rapidly – such as Open Data Kit (ODK) or EpiCollect. Now, there is another offering from Esri, in the form of Survey123 app – which is explained in the video below. Survey123 is integrated into ArcGIS Online, so you need an ArcGIS account to use it (you … Continue reading Esri survey123 tool – rapid prototyping geographical citizen science tool
Back in February, my report ‘Citizen Science & Policy: a European Perspective‘ was published by the Wilson Centre in the US. As I was trying to make sense of the relevance of citizen science to policy making, I used a framework that included the level of geography, area of policy making and the type of … Continue reading Citizen Science and Policy – possible frameworks
The COST Energic network (see VGIBox.eu ) is running a 2 day geolocated twitter chat, titled ‘Volunteered Geographic Information Day’ so the hashtag is #VGIDay. The conversation will take place on 14th and 15th May 2015, and we are universalists – join from anywhere in the world! Joining is easy – and require 3 steps: Follow the … Continue reading Spatial Conversation – #VGIday #COSTEnergic
A new book out about OpenStreetMap and Geographic Information Science. The book, which was edited by Jamal Jokar Arsanjani, Alexander Zipf, Peter Mooney, Marco Helbich is “OpenStreetMap in GISciene : Experiences, Research, and applications” contains 16 chapters on different aspects of OpenStreetMap in GIScience including 1) Data Management and Quality, 2) Social Context, 3) Network Modeling and … Continue reading OpenStreetMap in GIScience – Experiences, Research, and Applications
Yesterday, Tenille Brown led a Twitter discussion as part of the Geothink consortium. Tenille opened with a question about liability and wrongful acts that can harm others First off we can look at the definition of “torts”- a tort refers to a wrongful act which results in injury to another person, etc #geothink — Tenille E. […]
“Urban form and function have been studied extensively in urban planning and geographic information science. However, gaining a greater understanding of how they merge to define the urban morphology remains a substantial scientific challenge. Towards this goal, this paper addresses the opportunities presented by the emergence of crowdsourced data to gain novel insights into form and function in urban spaces. We are focusing in particular on information harvested from social media and other open-source and volunteered datasets (e.g. trajectory and OpenStreetMap data). These data provide a first-hand account of form and function from the people who define urban space through their activities. This novel bottom-up approach to study these concepts complements traditional urban studies work to provide a new lens for studying urban activity. By synthesizing recent advancements in the analysis of open-source data we provide a new typology for characterizing the role of crowdsourcing in the study of urban morphology. We illustrate this new perspective by showing how social media, trajectory, and traffic data can be analyzed to capture the evolving nature of a city’s form and function. While these crowd contributions may be explicit or implicit in nature, they are giving rise to an emerging research agenda for monitoring, analyzing and modeling form and function for urban design and analysis.”
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| A typology of implicit and explicit form and function content |
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| Aggregation methods for varied scales of built environment analysis |
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| Neighborhood map and topic modeling results showing the mixture of social functions in each area. |
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| The persistent urban morphology concept. |
We hope you enjoy the paper.
Full Reference:
Crooks, A.T., Pfoser, D., Jenkins, A., Croitoru, A., Stefanidis, A., Smith, D. A., Karagiorgou, S., Efentakis, A. and Lamprianidis, G. (2015), Crowdsourcing Urban Form and Function, International Journal of Geographical Information Science. DOI: 10.1080/13658816.2014.977905 (pdf)
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