From Buildings to Cities: Techniques for the Multi-Scale Analysis of Urban Form and Function

Duncan Smith here at CASA and Andrew Crooks, an assistant professor in the Department of Computational Social Science, at  George Mason University have just finished a new working paper entitled "From Buildings to Cities: Techniques for the Multi-Scale Analysis of Urban Form and Function."

Below is the abstract :

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: Techniques for the Multi-Scale Analysis of Urban Form and Function, Centre for Advanced Spatial Analysis (University College London): Working Paper 155, London, UK.

You can download the paper direct (2.8Mb pdf) or view the complete 156 strong CASA Working Paper Series.

Mapping for the Masses: Accessing Web 2.0 through Crowdsourcing

Our latest working paper is now available for download - entitled Mapping for the Masses: Accessing Web 2.0 through Crowdsourcing.

Abstract

The paper first develops the network paradigm that is currently dominating the way we think about the internet and introduce varieties of social networking that are being fashioned in interactive web environments. This serves to ground our arguments about Web 2.0 technologies. These constitute ways in which users of web-based services can take on the role of producers as well as consumers of information that derive from such services with sharing becoming a dominant mode of adding value to such data.

These developments are growing Web 2.0 from the ground up, enabling users to derive hitherto unknown, hidden and even new patterns and correlations in data that imply various kinds of social networking.

We define crowdsourcing and crowdcasting as essential ways in which large groups of users come together to create data and to add value by sharing. This is highly applicable to new forms of mapping. We begin by noting that maps have become important services on the internet with nonproprietary services such as Google Maps being ways in which users can fashion their own functionality. We review various top-down and bottom-up strategies and then present our own contributions in the form of GMapCreator that lets users fashion new maps using Google Maps as a base.

We have extended this into an archive of pointers to maps created by this software, which is called MapTube, and we demonstrate how it can be used in a variety of contexts to share map information, to put existing maps into a form that can be shared, and to create new maps from the bottom up using a combination of crowdcasting, crowdsourcing and traditional broadcasting.

The paper concludes by arguing that these developments define a neogeography which is essentially ‘mapping for the masses’.

Download the paper as a pdf (1.8Mb)

Those interested may also like to check out our full working paper series, including the recent The Renaissance of Geographic Information: Neogeography, Gaming and Second Life.

The Renaissance of Geographic Information: Neogeography, Gaming and Second Life: Working Paper 142

The world of Geographic Information (GI) Science has changed. It has experienced expeditious growth over the last few years leading to fundamental changes to the field. Web 2.0, specifically The Cloud, GeoWeb and Wikitecture are revolutionising the way in which we present, share and analyse geographic data.

In this paper we outline and provide working examples a suite of tools which are detailed below, aimed at developing new applications of GIS and related technologies. GeoVUE is one of seven nodes in the National Centre for e-Social Science whose mission it is to develop web-based technologies for the social and geographical sciences. The Node, based at the Centre for Advanced Spatial Analysis, University College London has developed a suite of free software allowing quick and easy visualisation of geographic data in systems such as Google Maps, Google Earth, Crysis and Second Life.


These tools address two issues, firstly that spatial data is still inherently difficult to share and visualise for the non-GIS trained academic or professional and secondly that a geographic data social network has the potential to dramatically open up data sources for both the public and professional geographer.


With our applications of GMap Creator, and MapTube to name but two, we detail ways to intelligently visualise and share spatial data. This paper concludes with detailing usage and outreach as well as an insight into how such tools are already providing a significant impact to the outreach of geographic information.

Such tools open up a cornucopia of possibilities for the world of GI Science, especially for geovisualisation and it is high time to embrace the Neogeographer, the data and perhaps more importantly the services they are creating.

Welcome to the new world of geographic information.

Authored by Dr Andrew Hudson-Smith (Digital Urban) and Dr Andrew Crooks (gisagents.blogspot.com)

You can download the full paper The Renaissance of Geographic Information: Neogeography, Gaming and Second Life in .pdf format (9.8Mb).

Working Paper: Collaborative Mapping of London Using Google Maps: The LondonProfiler

Maurizio Gibin, Alex Singleton, Richard Milton, Pablo Mateos & Paul Longley from here at CASA, where Digital Urban is based, have just released a new working paper.

Entitled Collaborative Mapping of London Using Google Maps: The LondonProfiler, it is a must read for anyone interested in the labs Google Map Creator software and the way it can be used to display information.


The papers abstract is as follows:

This paper begins by reviewing the ways in which the innovation of Google Maps has transformed our ability to reference and view geographically referenced data. We describe the ways in which the GMap Creator tool developed under the ESRC National Centre for E Social Science programme enables users to ‘mashup’ thematic choropleth maps using the Google API.

We illustrate the application of GMap Creator using the example of www.londonprofiler.org, which makes it possible to view a range of health, education and other socioeconomic datasets against a backcloth of Google Maps data.

Our conclusions address the ways in which Google Map mashups developed using GMap Creator facilitate online exploratory cartographic visualisation in a range of areas of policy concern.

The paper is available as a PDF (732Kb)Download.

To see the work in action, take a look at the London Profiler site.

At the moment we are working on a new working paper on Neogeography, it should be online later this week as a download....