10 December, 2013
There is something in the physical presence of book that is pleasurable. Receiving the copy of Introducing Human Geographies was special, as I have contributed a chapter about Geographic Information Systems to the ‘cartographies’ section.
It might be a response to Ron Johnston critique of Human Geography textbooks or a decision by the editors to extend the content of the book, but the book now contains three chapters that deal with maps and GIS. The contributions are the ‘Power of maps’ by Jeremy Crampton, a chapter about ‘Geographical information systems’ by me, and ‘Counter geographies’ by Wen Lin. To some extent, we’ve coordinated the writing, as this is a textbook for undergraduates in geography and we wanted to have a coherent message.
In my chapter I have covered both the quantitative/spatial science face of GIS, as well as the critical/participatory one. As the introduction to the section describes:
“Chapter 14 focuses on the place of Geographical Information Systems (GIS) within contemporary mapping. A GIS involves the representation of geographies in digital computers. … GIS is now a widespread and varied form of mapping, both within the academy and beyond. In the chapter, he speaks to that variety by considering the use of GIS both within practices such as location planning, where it is underpinned by the intellectual paradigm of spatial science and quantitative data, and within emergent fields of ‘critical’ and ‘qualitative GIS’, where GIS could be focused on representing the experiences of marginalized groups of people, for example. Generally, Muki argues against the equation of GIS with only one sort of Human Geography, showing how it can be used as a technology within various kinds of research. More specifically, his account shows how current work is pursuing those options through careful consideration of both the wider issues of power and representation present in mapping and the detailed, technical and scientific challenges within GIS development.”
To preview the chapter on Google Book, use this link . I hope that it will be useful introduction to GIS to Geography students.
17 May, 2013
The UCL Urban Laboratory is a cross-disciplinary initiative that links various research interest in urban issues, from infrastructure to the way they are expressed in art, films and photography. The Urban Laboratory has just published its first Urban Pamphleteer which aim to ‘confront key contemporary urban questions from diverse perspectives. Written in a direct and accessible tone, the intention of these pamphlets is to draw on the history of radical pamphleteering to stimulate debate and instigate change.’
My contribution to the first pamphleteer, which focused on ‘Future & Smart Cities’ is dealing with the balance between technology companies, engineers and scientists and the values, needs and wishes of the wider society. In particular, I suggest the potential of citizen science in opening up some of the black boxes of smart cities to wider societal control. Here are the opening and the closing paragraphs of my text, titled Beyond quantification: we need a meaningful smart city:
‘When approaching the issue of Smart Cities, there is a need to discuss the underlying assumptions at the basis of Smart Cities and challenge the prevailing thought that only efficiency and productivity are the most important values. We need to ensure that human and environmental values are taken into account in the design and implementation of systems that will influence the way cities operate…
…Although these Citizen Science approaches can potentially develop new avenues for discussing alternatives to the efficiency and productivity logic of Smart Cities, we cannot absolve those with most resources and knowledge from responsibility. There is an urgent need to ensure that the development and use of the Smart Cities technologies that are created is open to democratic and societal control, and that they are not being developed only because the technologists and scientists think that they are possible.’
The pamphleteer is not too long – 32 pages – and include many thought-provoking pieces from researchers in Geography, Environmental Engineering, Architecture, Computer Science and Art. It can be downloaded here.
29 April, 2013
CHI (Computer-Human Interaction) is the premier conference in the calendar of Human-Computer Interaction (HCI) studies. While the first paper that deal with geographic technologies within this conference was presented in 1991 (it was about User Interfaces for Geographic Information Systems by Andrew Frank and presented at a special interest group meeting), geography did not received much attention from HCI researchers in general, though the growth of location-based technologies made it a growing area in recent years. As I noted elsewhere, HCI did received interest in GIScience over the years, with more attention paid to spatial cognition and fundamental aspects of knowledge representation but unfortunately less on interaction design and exploration of user studies.
This sort of loose coupling between GIScience and HCI is also reflected in personal histories. I was aware of CHI and its importance for over 15 years, but I never managed to attend one – until now. When Brent Hecht invited me to join a CHI workshop proposal on Geographic HCI (GeoHCI), I jumped on the opportunity. The process of working together with HCI researchers on coordinating and curating a workshop led to mutual learning about priorities and practices of work of the two different research communities – in the tone and style of position papers, reviews and ways of organising a meeting. The response to the call for position papers was overwhelming and demonstrated the interest from both geography and HCI communities to find opportunities to converse and share ideas.
The workshop itself was excellent, with coverage of many topics that are being actively researched in Geography and GIScience – and the papers and presentation cover crowdsourced/volunteered geographic information, use of geographic information in crisis situations, participatory mapping and citizen science, concepts of place and space, personal memories, and of course many interactions with maps.
My own talk focused on Geography and HCI, exploring the point of view of geography when approaching computing environments to represent and communicate geographical knowledge. I have used human geography and particularly the concept of space/place to highlight the contribution that geography can make. For example in understanding the multiplicity of interpretation of place by using both David Harvey critique of spatial sciences in the understanding of place, and Doreen Massey relational geography description of places as ‘stories so far’ in ‘For Space‘ as a clear example of different conceptualisation of what they are.
One particular point that I highlighted, following the first chapter of Introducing Human Geographies in which a differentiation is made between Geography as ‘writing the Earth’: looking at human-nature relationship in the wider sense, versus ‘writing the World’ : looking at society-space relationships. For HCI audience I described it by rephrasing Don Norman’s differentiation between ‘Geography in the world‘ which is about the way people interact with the physical environment around them, versus ‘Geography in the head‘ which is the cultural, personal and social understanding of the place where they are and how they want to shape their personal activities, memories and interactions. Of course, Geography in the world is easier to represent in computers then the Geography in the head, and my personal view is that too much emphasis is paid to the first type.
Another part of the presentation focused on the importance of Cartography for geographical technologies, and why issues of map scale, media and task context are very important when designing geographic applications. For example, the value of paper as a media and understanding that maps are more about context then about ‘you are here’.
My position paper is available here . My presentation is provided below
In my view, the workshop was very valuable in opening new conversations. I have now a better understanding of the context in which HCI researchers in Google, Yahoo! and Pitney-Bowes Business Insight consider geography and what problems they have. The issue of place and the need to explore platial information came up several times, and we also experienced the multi-sensory engagement with place which are difficult to capture in digital forms. Most importantly, this was an experience in understanding the language and ways of expression that can help in bridging the two communities.
Since early 2010, I had the privilege of being a member of the editorial board of the journal Transactions of the Institute of British Geographers . It is a fascinating position, as the journal covers a wide range of topics in geography, and is also recognised as one of the top journals in the field and therefore the submissions are usually of high quality. Over the past 3 years, I was following a range of papers that deal with various aspects of Geographic Information Science (GIScience) from submission to publication either as a reviewer or as associate editor.
In early 2011, I agreed to coordinate a virtual issue on GIScience. The virtual issue is a collection of papers from the archives of the journal, demonstrating the breadth of coverage and the development of GIScience within the discipline of geography over the years. The virtual issues provide free access to a group of papers for a period of a year, so they can be used for teaching and research.
Editing the virtual issue was a very interesting task – I was exploring the archives of the journal, going back to papers that appeared in the 1950s and 1960s. When looking for papers that are relevant to GIScience, I came across various papers that relate to geography’s ‘Quantitative Revolution‘. The evolution of use of computers in geography and later on the applications of GIS is covered in many papers, so the selection was a challenge. Luckily, another member of the editorial board, Brian Lees, is also well versed in GIScience as the editor of the International Journal of GIScience. Together, we made the selection of the papers that are included in the issue. Other papers are not part of the virtual issue but are valuable further reading.
To accompany the virtual issue, I have written a short piece, focusing on the nature of GIScience in geography. The piece is titled “Geographic Information Science: tribe, badge and sub-discipline” and is exploring how the latest developments in technology and practice are integrated and resisted by the core group of people who are active GIScience researchers in geography.
You can access the virtual issue on Wiley-Blackwell online library and you will find papers from 1965 to today, with links to further papers that are relevant but not free for access. The list of authors is impressive, including many names that are associated with the development of GIScience over the years from Torstan Hägerstrand or David Rhind to current researchers such as Sarah Elwood, Agnieszka Leszczynski or Matt Zook.
The virtual issue will be officially launched (and was timed to coincide with) at the GIScience 2012 conference.
As I cannot attend the conference, and as my paper mentioned the Twitter-based GeoWebChat (see http://mappingmashups.net/geowebchat/) which is coordinated by Alan McConchie, I am planning to use this medium for running a #geowebchat that is dedicated to the virtual issue on the 18th September 2012, at 4pm EDT, 9pm BST so those who attend the conference can join at the end of the workshops day.
22 June, 2012
At the end of 2010, Matt Wilson (University of Kentucky) and Mark Graham(Oxford Internet Institute), started coordinating a special issue of Environment and Planning Adedicated to ‘Situating Neogeography’, asking ‘How might we situate neogeography? What are the various assemblages, networks, ecologies, configurations, discourses, cyborgs, alliances that enable/enact these technologies?’
My response to this call is a paper titled ‘Neogeography and the delusion of democratisation’ and it is finally been accepted for publication. I am providing below an excerpt from the introduction, to provide a flavour of the discussion:
“Since the emergence of the World Wide Web (Web) in the early 1990s, claims about its democratic potential and practice are a persistent feature in the discourse about it. While awareness of the potential of ‘anyone, anytime, anywhere’ to access and use information was extolled for a long while (for an early example see Batty 1997), the emergence of Web 2.0 in the mid-2000s (O’Reilly 2005) increased this notion. In the popular writing of authors such as Friedman (2006), these sentiments are amplified by highlighting the ability of anyone to ‘plug into the flat earth platform’ from anywhere and anytime.
Around the middle of the decade, the concept of neogeography appeared and the ability to communicate geographic information over the Web (in what is termed the GeoWeb) gained prominence (see Haklay et al. 2008). Neogeography increased the notion of participation and access to geographic information, now amplified through the use of the political term democratisation. The following citations provide a flavour of the discourse within academic and popular writing – for example, in Mike Goodchild’s declaration that ‘Just as the PC democratised computing, so systems like Google Earth will democratise GIS’ (quoted in Butler 2006), or Turner’s (2006) definition of neogeography as ‘Essentially, Neogeography is about people using and creating their own maps, on their own terms and by combining elements of an existing toolset. Neogeography is about sharing location information with friends and visitors, helping shape context, and conveying understanding through knowledge of place’. This definition emphasises the wide access to the technology in everyday practice. Similar and stronger statements can be found in Warf and Sui (2010) who clarify that ‘neogeography has helped to foster an unprecedented democratization of geographic knowledge’ (p. 200) and, moreover, ‘Wikification represents a significant step forward in the democratization of geographic information, shifting control over the production and use of GIS data from a handful of experts to large groups of users’ (ibid.). Even within international organisations this seems to be the accepted view as Nigel Snoad, strategy adviser for the communications and information services unit of the United Nations Office for the Coordination of Humanitarian Affairs (OCHA), stated: ‘On the technology side, Google, Microsoft and OpenStreetMap have really democratized mapping’ (cited in Lohr 2011).
However, what is the nature of this democratisation and what are its limits? To what extent do the technologies that mediate the access to, and creation of, geographic information allow and enable such democratisation?
To answer these questions, we need to explore the meaning of democratisation and, more specifically, within the context of interaction between people and technology. According to the Oxford English Dictionary, democratisation is ‘the action of rendering, or process of becoming, democratic’, and democracy is defined as ‘Government by the people; that form of government in which the sovereign power resides in the people as a whole, and is exercised either directly by them (as in the small republics of antiquity) or by officers elected by them. In modern use often more vaguely denoting a social state in which all have equal rights, without hereditary or arbitrary differences of rank or privilege’ [emphasis added]. A more colloquial notion of democratisation, and a much weaker one, is making a process or activity that used to be restricted to an elite or privileged group available to a wider group in society and potentially to all. For example, with mobile telephony now available across the globe, the statement ‘mobile telephony has been democratised’ aims to express the fact that, merely three decades ago, only the rich and powerful members of Western society had access to this technology.
Therefore, it is accepted from the start that the notion of democratisation cited above is more about the potential of neogeography to make the ability to assemble, organise and share geographical information accessible to anyone, anywhere and anytime and for a variety of purposes than about advancing the specific concept of democracy. And yet, it will be wrong to ignore the fuller meaning of the concept. Democratisation has a deeper meaning in respect of making geographic information technologies more accessible to hitherto excluded or marginalised groups in a way that assists them to make a change in their life and environment. Democratisation evokes ideas about participation, equality, the right to influence decision making, support to individual and group rights, access to resources and opportunities, etc. (Doppelt 2006). Using this stronger interpretation of democratisation reveals the limitation of current neogeographic practices and opens up the possibility of considering alternative development of technologies that can, indeed, be considered as democratising.
To explore this juncture of technology and democratisation, this paper relies on Andrew Feenberg’s critical philosophy of technology, especially as explored in his Questioning Technology (1999) and Transforming Technology (2002), which is useful as he addresses issues of democratisation and technology directly. For readers who are not familiar with the main positions within philosophy of technology, a very brief overview – based on Feenberg’s interpretation (1999) – is provided. This will help to explain his specific critique and suggestion for ‘deep democratisation’ of technology.
Equipped with these concepts, attention is turned to the discussion about the democratic potential of Geographic Information Systems (GIS), which appears in early discussions about GIS and society in the 1990s, and especially to the discussions within the literature on (Public) Participatory GIS (PPGIS/PGIS – assumed to be interchangeable here) and critical GIS. As we shall see, discussions about empowerment, marginalisation and governance are central to this literature from its inception and provide the foundations to build a deeper concept of democratisation when considering neogeographic practices.
Based on this historical understanding, the core of the paper explores why it is that neogeographic practices are assumed to be democratising and, more importantly, what the limitations are on their democratic potential. To do that, a hierarchy of ‘hacking’ – that is the artful alteration of technology beyond the goals of its original design or intent – is suggested. Importantly, here ‘hacking’ does not mean the malicious alteration of technology or unauthorised access to computer systems, or the specific culture of technology enthusiasts (‘hacker culture’). The term is used to capture the first and second instrumentation that Feenberg (1996, 2002) describes. As we shall see, by exploring the ability to alter systems, there is some justification in the democratisation claims of neogeography as it has, indeed, improved the outreach of geographic technologies and opened up the potential of their use in improving democratic processes, but in a much more limited scope and extent. The paper concludes with observations on the utilisation of neogeographic technologies within the participatory process that aim to increase democratisation in its deeper sense.”
The paper’s concepts are based on talk that I originally gave in 2008 as part of the World University Netowrk seminar on Neogeography. A final note is about the length of time that some ideas need from first emerging until publication – even with the current imagination of ‘fast moving technology’, there is a value in thinking through an idea over 4 years.
The previous post focused on citizen science as participatory science. This post is discussing the meaning of this differentiation. It is the final part of the chapter that will appear in the book:
The typology of participation can be used across the range of citizen science activities, and one project should not be classified only in one category. For example, in volunteer computing projects most of the participants will be at the bottom level, while participants that become committed to the project might move to the second level and assist other volunteers when they encounter technical problems. Highly committed participants might move to a higher level and communicate with the scientist who coordinates the project to discuss the results of the analysis and suggest new research directions.
This typology exposes how citizen science integrates and challenges the way in which science discovers and produces knowledge. Questions about the way in which knowledge is produced and truths are discovered are part of the epistemology of science. As noted above, throughout the 20th century, as science became more specialised, it also became professionalised. While certain people were employed as scientists in government, industry and research institutes, the rest of the population – even if they graduated from a top university with top marks in a scientific discipline – were not regarded as scientists or as participants in the scientific endeavour unless they were employed professionally to do so. In rare cases, and following the tradition of ‘gentlemen/women scientists’, wealthy individuals could participate in this work by becoming an ‘honorary fellow’ or affiliated to a research institute that, inherently, brought them into the fold. This separation of ‘scientists’ and ‘public’ was justified by the need to access specialist equipment, knowledge and other privileges such as a well-stocked library. It might be the case that the need to maintain this separation is a third reason that practising scientists shy away from explicitly mentioning the contribution of citizen scientists to their work in addition to those identified by Silvertown (2009).
However, similarly to other knowledge professionals who operate in the public sphere, such as medical experts or journalists, scientists need to adjust to a new environment that is fostered by the Web. Recent changes in communication technologies, combined with the increased availability of open access information and the factors that were noted above, mean that processes of knowledge production and dissemination are opening up in many areas of social and cultural activities (Shirky 2008). Therefore, some of the elitist aspects of scientific practice are being challenged by citizen science, such as the notion that only dedicated, full-time researchers can produce scientific knowledge. For example, surely it should be professional scientists who can solve complex scientific problems such as long-standing protein-structure prediction of viruses. Yet, this exact problem was recently solved through a collaboration of scientists working with amateurs who were playing the computer game Foldit (Khatib et al. 2011). Another aspect of the elitist view of science can be witnessed in interaction between scientists and the public, where the assumption is of unidirectional ‘transfer of knowledge’ from the expert to lay people. Of course, as in the other areas mentioned above, it is a grave mistake to argue that experts are unnecessary and can be replaced by amateurs, as Keen (2007) eloquently argued. Nor is it suggested that, because of citizen science, the need for professionalised science will diminish, as, in citizen science projects, the participants accept the difference in knowledge and expertise of the scientists who are involved in these projects. At the same time, the scientists need to develop respect towards those who help them beyond the realisation that they provide free labour, which was noted above.
Given this tension, the participation hierarchy can be seen to be moving from a ‘business as usual’ scientific epistemology at the bottom, to a more egalitarian approach to scientific knowledge production at the top. The bottom level, where the participants are contributing resources without cognitive engagement, keeps the hierarchical division of scientists and the public. The public is volunteering its time or resources to help scientists while the scientists explain the work that is to be done but without expectation that any participant will contribute intellectually to the project. Arguably, even at this level, the scientists will be challenged by questions and suggestions from the participants and, if they do not respond to them in a sensitive manner, they will risk alienating participants. Intermediaries such as the IBM World Community Grid, where a dedicated team is in touch with scientists who want to run projects and a community of volunteered computing providers, are cases of ‘outsourcing’ the community management and thus allowing, to an extent, the maintenance of the separation of scientists and the public.
As we move up the ladder to a higher level of participation, the need for direct engagement between the scientist and the public increases. At the highest level, the participants are assumed to be on equal footing with the scientists in terms of scientific knowledge production. This requires a different epistemological understanding of the process, in which it is accepted that the production of scientific insights is open to any participant while maintaining scientific standards and practices such as systematic observations or rigorous statistical analysis to verify that the results are significant. The belief that, given suitable tools, many lay people are capable of such endeavours is challenging to some scientists who view their skills as unique. As the case of the computer game that helped in the discovery of new protein formations (Khatib et al. 2011) demonstrated, such collaboration can be fruitful even in cutting-edge areas of science. However, it can be expected that the more mundane and applied areas of science will lend themselves more easily to the fuller sense of collaborative science in which participants and scientists identify problems and develop solutions together. This is because the level of knowledge required in cutting-edge areas of science is so demanding.
Another aspect in which the ‘extreme’ level challenges scientific culture is that it requires scientists to become citizen scientists in the sense that Irwin (1995), Wilsdon, Wynne and Stilgoe (2005) and Stilgoe (2009) advocated (Notice Stilgoe’s title: Citizen Scientists). In this interpretation of the phrase, the emphasis is not on the citizen as a scientist, but on the scientist as a citizen. It requires the scientists to engage with the social and ethical aspects of their work at a very deep level. Stilgoe (2009, p.7) suggested that, in some cases, it will not be possible to draw the line between the professional scientific activities, the responsibilities towards society and a fuller consideration of how a scientific project integrates with wider ethical and societal concerns. However, as all these authors noted, this way of conceptualising and practising science is not widely accepted in the current culture of science.
Therefore, we can conclude that this form of participatory and collaborative science will be challenging in many areas of science. This will not be because of technical or intellectual difficulties, but mostly because of the cultural aspects. This might end up being the most important outcome of citizen science as a whole, as it might eventually catalyse the education of scientists to engage more fully with society.
12 May, 2011
GIS Research UK (GISRUK) is a long running conference series, and the 2011 instalment was hosted by the University of Portsmouth at the end of April.
During the conference, I was asked to give a keynote talk about Participatory GIS. I decided to cover the background of Participatory GIS in the mid-1990s, and the transition to more advanced Web Mapping applications from the mid-2000s. Of special importance are the systems that allow user-generated content, and the geographical types of systems that are now leading to the generation of Volunteer Geographic Information (VGI).
The next part of the talk focused on Citizen Science, culminating with the ideas that are the basis for Extreme Citizen Science.
Interestingly, as in previous presentations, one of the common questions about Citizen Science came up. Professional scientists seem to have a problem with the suggestion that citizens are as capable as scientists in data collection and analysis. While there is an acceptance about the concept, the idea that participants can suggest problems, collect data rigorously and analyse it seems to be too radical – or worrying.
What is important to understand is that the ideas of Extreme Citizen Science are not about replacing the role of scientists, but are a call to rethink the role of the participants and the scientists in cases where Citizen Science is used. It is a way to consider science as a collaborative process of learning and exploration of issues. My own experience is that participants have a lot of respect for the knowledge of the scientists, as long as the scientists have a lot of respect for the knowledge and ability of the participants. The participants would like to learn more about the topic that they are exploring and are keen to know: ‘what does the data that I collected mean?’ At the same time, some of the participants can become very serious in terms of data collection, reading about the specific issues and using the resources that are available online today to learn more. At some point, they are becoming knowledgeable participants and it is worth seeing them as such.
The slides below were used for this talk, and include links to the relevant literature.
10 February, 2011
In 2009, Ud Doron, who studied on our MSc in Environmental Systems Engineering developed a research project together with Tse-Hui Teh, who is doing her PhD on urban water issues. The project was co-supervised by Sarah Bell.
The focus of the project was on a series of participatory workshops to understand the relationships between urban residents and water technology. The workshops explored the perceptions and actions of environmentally aware citizens. Ud also explored the use of environmental information by the participants of the workshops. The output of this work is now written and published in the Water and Environment Journal.
The paper is titled Public engagement with water conservation in London
The abstract is:
Understanding water demand and consumers’ capacity for change is essential in underpinning water demand management and water efficiency programmes. This paper presents the outcomes of a qualitative study, which used discussion groups relating to water infrastructure with environmentally aware citizens in five London boroughs in the Lower Lea River Basin. The results showed a subtle interaction between users, water and technology. Users are generally unaware of their own water consumption. Individual perceptions of changes in water behaviour are constrained by habit and lack of knowledge about what changes can be made and how. Knowledge of environmental information was described as the inspiration behind making any changes. The paper concludes that access to information about water resources, infrastructure and conservation measures should be enhanced because although information sources are abundant, participants claimed they were inaccessible without considerable effort. Finally, an emphasis should also be put on helping the public form a more substantial part in environmental decisions.
and the paper is accessible in the early view section of the Water and Environment Journal http://onlinelibrary.wiley.com/doi/10.1111/j.1747-6593.2011.00256.x/full
Completeness in volunteered geographical information – the evolution of OpenStreetMap coverage (2008-2009)
13 August, 2010
The Journal of Spatial Information Science (JOSIS) is a new open access journal in GIScience, edited by Matt Duckham, Jörg-Rüdiger Sack, and Michael Worboys. In addition, the journal adopted an open peer review process, so readers are invited to comment on a paper while it goes through the formal peer review process. So this seem to be the most natural outlet for a new paper that analyses the completeness of OpenStreetMap over 18 months – March 2008 to October 2009. The paper was written in collaboration with Claire Ellul. The abstract of the paper provided below, and you are very welcome to comment on the paper on JOSIS forum that is dedicated to it, where you can also download it.
Abstract: The ability of lay people to collect and share geographical information has increased markedly over the past 5 years as results of the maturation of web and location technologies. This ability has led to a rapid growth in Volunteered Geographical Information (VGI) applications. One of the leading examples of this phenomenon is the OpenStreetMap project, which started in the summer of 2004 in London, England. This paper reports on the development of the project over the period March 2008 to October 2009 by focusing on the completeness of coverage in England. The methodology that is used to evaluate the completeness is comparison of the OpenStreetMap dataset to the Ordnance Survey dataset Meridian 2. The analysis evaluates the coverage in terms of physical coverage (how much area is covered), followed by estimation of the percentage of England population which is covered by completed OpenStreetMap data and finally by using the Index of Deprivation 2007 to gauge socio-economic aspects of OpenStreetMap activity. The analysis shows that within 5 years of project initiation, OpenStreetMap already covers 65% of the area of England, although when details such as street names are taken into consideration, the coverage is closer to 25%. Significantly, this 25% of England’s area covers 45% of its population. There is also a clear bias in data collection practices – more affluent areas and urban locations are better covered than deprived or rural locations. The implications of these outcomes to studies of volunteered geographical information are discussed towards the end of the paper.
3 August, 2010
The process of academic publication takes a long time, so only now my paper from 2008 is finally in print.
So the paper, which should be cited as:
“Haklay, M., 2010, How good is volunteered geographical information? A comparative study of OpenStreetMap and Ordnance Survey datasets” Environment and Planning B: Planning and Design 37(4) 682 – 703″
It’s abstract is:
Within the framework of Web 2.0 mapping applications, the most striking example of a geographical application is the OpenStreetMap (OSM) project. OSM aims to create a free digital map of the world and is implemented through the engagement of participants in a mode similar to software development in Open Source projects. The information is collected by many participants, collated on a central database, and distributed in multiple digital formats through the World Wide Web. This type of information was termed ‘Volunteered Geographical Information’ (VGI) by Goodchild, 2007. However, to date there has been no systematic analysis of the quality of VGI. This study aims to fill this gap by analysing OSM information. The examination focuses on analysis of its quality through a comparison with Ordnance Survey (OS) datasets. The analysis focuses on London and England, since OSM started in London in August 2004 and therefore the study of these geographies provides the best understanding of the achievements and difficulties of VGI. The analysis shows that OSM information can be fairly accurate: on average within about 6 m of the position recorded by the OS, and with approximately 80% overlap of motorway objects between the two datasets. In the space of four years, OSM has captured about 29% of the area of England, of which approximately 24% are digitised lines without a complete set of attributes. The paper concludes with a discussion of the implications of the findings to the study of VGI as well as suggesting future research directions.