Monday, September 06, 2010

New Report: Data mash-ups and the future of mapping

Several months ago we (Suchith Anand, Michael Batty, Andrew Crooks, Andrew Hudson-Smith, Mike Jackson, Richard Milton, Jeremy Morley) where commissioned by the UK's Joint Information Systems Committee (JISC) to produce a TechWatch horizon scanning report entitled "Data mash-ups and the future of mapping."

Below is the executive summary of the report:

"The term 'mash-up' refers to websites that weave data from different sources into new Web services. The key to a successful Web service is to gather and use large datasets and harness the scale of the Internet through what is known as network effects. This means that data sources are just as important as the software that 'mashes' them, and one of the most profound pieces of data that a user has at any one time is his or her location. In the past this was a somewhat fuzzy concept, perhaps as vague as a verbal reference to being in a particular shop or café or an actual street address. Recent events, however, have changed this. In the 1990s, President Bill Clinton's policy decision to open up military GPS satellite technology for 'dual-use' (military and civilian) resulted in a whole new generation of location-aware devices. Around the same time, cartography and GIScience were also undergoing dramatic, Internet-induced changes. Traditional, resource intensive processes and established organizations, in both the public and private sectors, were being challenged by new, lightweight methods. The upshot has been that map making, geospatial analysis and related activities are undergoing a process of profound change. New players have entered established markets and disrupted routes to knowledge and, as we have already seen with Web 2.0, newly empowered amateurs are part of these processes. Volunteers are quite literally grabbing a GPS unit and hitting the streets of their local town to help create crowdsourced datasets that are uploaded to both open source and proprietary databases.

The upshot is an evolving landscape which Tim O'Reilly, proponent of Web 2.0 and always ready with a handy moniker, has labelled Where 2.0. Others prefer the GeoWeb, Spatial Data Infrastructure, Location Infrastructure, or perhaps just location based services. Whatever one might call it, there are a number of reasons why its development should be of interest to those in higher and further education. Firstly, since a person's location is such a profound unit of information and of such value to, for example, the process of targeting advertising, there has been considerable investment in Web 2.0-style services that make use of it. Understanding these developments may provide useful insights for how other forms of data might be used. Secondly, education, particularly research, is beginning to realize the huge potential of the data mash-up concept. As Government, too, begins to get involved, it is likely that education will be expected to take advantage of, and indeed come to relish, the new opportunities for working with data.

This TechWatch report describes the context for the changes that are taking place and explains why the education community needs to understand the issues around how to open up data, how to create mash-ups that do not compromise accuracy and quality and how to deal with issues such as privacy and working with commercial and non-profit third parties. It also shows how data mash-ups in education and research are part of an emerging, richer information environment with greater integration of mobile applications, sensor platforms, e-science, mixed reality, and semantic, machine-computable data and speculates on how this is likely to develop in the future."
The full report can be downloaded from here.

Full Reference: 
Anand, S., Batty, M., Crooks, A. T., Hudson-Smith, A., Jackson, M., Milton, R. and Morley, J. (2010), Data Mash-ups and the Future of Mapping. Joint Information Systems Committee (JISC) Technology and Standards Watch (TechWatch) Horizon Scanning report 10_01, Bristol, England. (pdf) 

Wednesday, August 18, 2010

Fractals

Vlasios Voudouris of the Object-Field Model blog linked to the following talk by Benoit Mandelbrot about "Fractals and the art of roughness." Like Vlasios I found it interesting so I thought I would share it, like him.




On a side note, anyone interested in fractals and want to see them in the context of cities should check out “Fractal Cities: A Geometry of Form and Function” by Professors Mike Batty and Paul Longley. It is a well written, a must read and often cited book for anyone interested in or writing about fractals, urban modeling and complexity sciences. The nice thing about the book is it is freely available at: http://www.fractalcities.org/

Tuesday, August 17, 2010

agent-based-models.com

Professor Jeff Schank of the Department of Psychology at the University of California is compiling a great website and a resource for those interested in ABM: agent-based-models.com. The site has a plethora of resources for agent-based modelers, including a blog, a list of ABM blogs, simulation environments, Organizations, Centers, and Institutes involved with ABM, a growing list of researchers involved with ABM.

Modeling Housing Markets: Update

A while ago I blogged about the a simple NetLogo model by Nigel Gilbert et al. which explores how some of the main features of the English housing market emerges from the interactions between buyers, realtors and sellers (click here to run the model). I have just come across an audio recording with accompanying slide presentation by Nigel Gilbert’s which enhances the previous post and thought it was worth sharing. Click here to listen and see the slides. The talk is hosted on the SIMIAN (Simulation Innovation: a Node) project website which aims to promote and develop social simulation methods in the UK.


Reference:
Gilbert, N, Hawksworth, J C, and Sweeney, P (2008) 'An Agent-based Model of the UK Housing Market'. University of Surrey http://cress.soc.surrey.ac.uk/housingmarket/ukhm.html or click here to read the paper.

Tuesday, July 20, 2010

New Working Paper: From Buildings to Cities


Below is the the abstract for this paper:

The built environment is a significant factor in many urban processes, yet direct measures of built form are seldom used in geographical studies. Representation and analysis of urban form and function could provide new insights and improve the evidence base for research. So far progress has been slow due to limited data availability, computational demands, and a lack of methods to integrate built environment data with aggregate geographical analysis. Spatial data and computational improvements are overcoming some of these problems, but there remains a need for techniques to process and aggregate urban form data. Here we develop a Built Environment Model of urban function and dwelling type classifications for Greater London, based on detailed topographic and address-based data (sourced from Ordnance Survey MasterMap). The multi-scale approach allows the Built Environment Model to be viewed at fine-scales for local planning contexts, and at city-wide scales for aggregate geographical analysis, allowing an improved understanding of urban processes. This flexibility is illustrated in the two examples, that of urban function and residential type analysis, where both local-scale urban clustering and city-wide trends in density and agglomeration are shown. While we demonstrate the multi-scale Built Environment Model to be a viable approach, a number of accuracy issues are identified, including the limitations of 2D data, inaccuracies in commercial function data and problems with temporal attribution. These limitations currently restrict the more advanced applications of the Built Environment Model.


The full title of the paper and reference is:
Smith, D. A. and Crooks, A. T. (2010), From Buildings to Cities: Enabling the Multi-Scale Analysis of Urban Form and Function through the integration of Geographical and Geometric Methods. Centre for Advanced Spatial Analysis (University College London): Working Paper 155, London, England. (pdf)