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Garrett Hardin's 1968 essay "The Tragedy of the Commons" famously decried the vulnerability of finite communal resources to overexploitation. Yet collective accessibility to and ownership of resources need not necessarily lead to their mismanagement or abuse; rather, the practice of sharing resources can engender positive environmental, social, economic, and political impacts. Social capital, as both the source and product of relational interactions which occur within public space, constitutes one of these benefits. This paper investigates the relationship between temporary communal spaces and social capital through a case study of the Commons project in Christchurch, New Zealand. Generated by both the space itself and the interactions that occur within it, the social capital created in and through the Commons has become a powerful symbol of recovery in a city recovering from disaster. Instead of the tragedy of the commons, therefore, this paper presents the story of the Commons of the tragedy and explores the ways in which social capital has been fostered in and through this space.

Safety from crime in multifamily housing environments, where residents usually share hallways, common outdoor facilities, and parking spaces, has been a subject of research for decades. Strategies and tactics employed to enhance the safety of these environments may differ depending on residents' characteristics. This study explored residents' perceived and actual safety in multifamily environments in the United States and South Korea, as well as significant environmental variables. Using Newman's defensible space theory as the primary theoretical framework, we focused on how perceived safety in public and semipublic spaces relates to overall perceptions of safety in residential environments. We also examined crime experience in these environments and verified significant demographic and socioeconomic variables associated with residents' perceptions of safety. Data were collected from site visits and questionnaires administered to residents living in multifamily environments. The level of residents' safety perceptions differed between the two groups of residents. However, both groups exhibited strong correlations between perceived safety from crime in their communities and perceived safety in public spaces, such as recreational areas and parking lots, and semipublic spaces, such as building entrances and the vicinity. These findings underscore strong relationships among residents' perceptions of safety in different outdoor spaces, which the defensible space theory also supports. Based on these findings, we suggest ideas to improve residents' actual safety and perceptions of safety from crime.

The social integration of a city depends on the extent to which people from different neighborhoods have the opportunity to interact with one another, but most prior work has not developed formal ways of conceptualizing and measuring this kind of connectedness. In this article, we develop original, network-based measures of what we call “structural connectedness” based on the everyday travel of people across neighborhoods. Our principal index captures the extent to which residents in each neighborhood of a city travel to all other neighborhoods in equal proportion. Our secondary index captures the extent to which travels within a city are concentrated in a handful of receiving neighborhoods. We illustrate the value of our indices for the 50 largest American cities based on hundreds of millions of geotagged tweets over 18 months. We uncover important features of major American cities, including the extent to which their connectedness depends on a few neighborhood hubs, and the fact that in several cities, contact between some neighborhoods is all but nonexistent. We also show that cities with greater population densities, more cosmopolitanism, and less racial segregation have higher levels of structural connectedness. Our indices can be applied to data at any spatial scale, and our measures pave the way for more powerful and precise analyses of structural connectedness and its effects across a broad array of social phenomena.

The Irvine Minnesota Inventory (IMI) was designed to measure environ- mental features that may be associated with physical activity and particularly walking. This study assesses how well the IMI predicts physical activity and walking behavior and develops shortened, validated audit tools. A version of the IMI was used in the Twin Cities Walking Study, a research project measuring how density, street pattern, mixed use, pedestrian infrastructure, and a variety of social and economic factors affect walking. Both bivariate and multivariate analyses were used to assess the predictive value of the IMI. We find that while this inventory provides reliable measurement of urban design features, only some of these features present associations with increased or decreased walking. This article presents two versions of shortened scales—a prudent scale, requiring association with two separate measures of a physical activity or walking behavior, and a moderate scale, requiring association with one measure of physical activity or walking. The shortened scales provide built environment audit instruments that have been tested both for inter- rater reliability and for associations with physical activity and walking. The results are also useful in showing which built environment variables are more reliably associated with walking for travel—characteristics of the sidewalk infrastructure, street crossings and traffic speeds, and land use are more strongly associated with walking for travel, while factors that measure aesthetics are typically less strongly associated with walking for travel.

The modern world is facing rapid urbanisation, increasing urban population, constant growth of cities and the construction of new neighbourhoods. Moreover, new neighbourhoods often lack the elements of identity in the context of the place and the people who live there. Therefore, it is necessary to construct these identities together with the physical and natural structure of place and the cultural identity of the people. The construction of spatial identities has been studied in two case studies of “new” neighbourhoods, Mađir (Banjaluka, Bosnia- Herzegovina) and Ilsvika (Trondheim, Norway), using a qualitative analysis method. The comparison makes use of a triangle model that includes three elements of identity construction as three points of analysis: a) spatial context, b) participation in processes of planning and construction and c) action in place. The two cultural contexts and two ways of constructing spatial identity in the new neighbourhoods studied show certain similarities and differences. The study points to the universal significance of this phenomenon and indicates that the process could be improved in each case by applying positive experiences from the other, with adaptation to the specific context. Considering the importance and interrelation of the three elements involved in construction of spatial identities, they should be harmonised in all stages of development.

Since the early 2000s, the proliferation of cameras, whether in mobile phones or CCTV, led to a sharp increase in visual recordings of human behavior. This vast pool of data enables new approaches to analyzing situational dynamics. Application is both qualitative and quantitative and ranges widely in fields such as sociology, psychology, criminology, and education. Despite the potential and numerous applications of this approach, a consolidated methodological frame does not exist. This article draws on various fields of study to outline such a frame, what we call video data analysis (VDA). We discuss VDA’s research agenda, methodological forebears, and applications, introduce an analytic tool kit, and discuss criteria for validity. We aim to establish VDA as a methodological frame and an interdisciplinary analytic approach, thereby enhancing efficiency and comparability of studies, and communication among disciplines that employ VDA. This article can serve as a point of reference for current and future practitioners, reviewers, and interested readers.

Guided walks near a light rail stop in downtown Salt Lake City, Utah, were examined using a 2 (gender) × 3 (route walkability: low- mixed-, or high- walkability features) design. Trained raters confirmed that more walkable segments had more traffic, environmental, and social safety; pleasing aesthetics; natural features; pedestrian amenities; and land use diversity (using the Irvine-Minnesota physical environment audit) and a superior social milieu rating. According to tape-recorded open-ended descriptions, university student participants experienced walkable route segments as noticeably safer, with a more positive social environment, fewer social and physical incivilities, and more attractive natural and built environment features. According to closed-ended scales, walkable route segments had more pleas- ant social and/or environmental atmosphere and better traffic safety. Few gender differences were found. Results highlight the importance of under- standing subjective experiences of walkability and suggest that these experiences should be an additional focus of urban design.

Research indicates that people are drawn to green spaces with attractive amenities. This study extends that finding by comparing walking patterns in two neighborhoods with different numbers of parks; parks did not differ in rated attractiveness nor did neighborhoods differ substantially in rated walkability. Adults, aged 32e86 years (n 1⁄4 90), drew their 3 most recent walking routes on maps of their neighborhood. Analyses showed that participants’ round trips were longer by 265.5 m (0.16 mile) in the neighborhood with a single, large, centrally located park (p < 0.02). However, participants in the neighborhood with multiple, small, more distributed parks, visited more streets, p < 0.001, more streets with green spaces, p < 0.038, and used more varied routes, p < 0.012. Results suggest there are potential benefits to both layouts. Large centralized parks may invite longer walks; smaller, well-distributed parks may invite more varied routes suggestive of appropriation and motivation processes. Both layouts might be combined in a single neighborhood to attract more walkers.

The growing proportion of human populations living in urban areas, and consequent trends of increasing urban expansion and densification fuel a need to understand how urban form and land use affect environmental quality, including the availability of urban green spaces. Here we use Sheffield as a case study of city-wide relationships between urban green space extent, quality (vegetation cover and tree-cover), and gradients in urban form and topography. The total area of buildings and length of the road network are equally strong negative predictors of extent of green space, while the former predictor is amore important negative influence upon green space quality. Elevation positively influences extent of green space but negatively influences tree-cover. In contrast, slope of terrain positively influences green space quality and is the best predictor of tree-cover. Overall housing density is a more important negative predictor of extent of green space and tree-cover than the densities of individual housing types. Nevertheless, the latter are more important influences upon levels of vegetation cover. Threshold effects of densities of different housing types suggest opportunities for optimising green space quality, with implications for housing policy. Variation in ecological quality of green space may partly reflect different historical intensities of industrial activity.

The collection of large-scale administrative records in electronic form by many cities provides a new opportunity for the measurement and longitudinal tracking of neighborhood characteristics, but one that will require novel methodologies that convert such data into research-relevant measures. The authors illustrate these challenges by developing measures of “broken windows” from Boston’s constituent relationship management (CRM) system (aka 311 hotline). A 16-month archive of the CRM database contains more than 300,000 address-based requests for city services, many of which reference physical incivilities (e.g., graffiti removal). The authors carry out three ecometric analyses, each building on the previous one. Analysis 1 examines the content of the measure, identifying 28 items that constitute two independent constructs, private neglect and public denigration. Analysis 2 assesses the validity of the measure by using investigator-initiated neighborhood audits to examine the “civic response rate” across neighborhoods. Indicators of civic response were then extracted from the CRM database so that measurement adjustments could be automated. These adjustments were calibrated against measures of litter from the objective audits. Analysis 3 examines the reliability of the composite measure of physical disorder at different spatiotemporal windows, finding that census tracts can be measured at two-month intervals and census block groups at six-month intervals. The final measures are highly detailed, can be tracked longitudinally, and are virtually costless. This framework thus provides an example of how new forms of large-scale administrative data can yield ecometric measurement for urban science while illustrating the methodological challenges that must be addressed.

Functioning public spaces, as ‘public’ political, social, and cultural arenas of citizen discourse, affect not only the citizen’s quality of life, but are also indispensable infrastructure in democratic societies. This article offers a nuanced understanding of Iranian women’s usage, feelings, and preferences in public spaces in present-day Tehran by not simply importing Western theories that sustain distinctions between traditional and modern women, but instead by hearing women’s stories. This article raises concerns related to the gender identities, the politics of space, and design of these places. Meidan-e-Tajrish, Sabz-e-Meidan, and Marvi Meidancheh in Tehran accommodate an ethnographic visualization of gendering space. The process by which Iranian women attach symbolic meanings to those public spaces offers insight into the mutual construction of gender identities and space politics. The contrasting urban locations, different design styles, and distinct social activities provide an excellent comparison between the selected public spaces. Findings suggest caution in using gender as an essential category in feminist geography research to better represent the diversity of experiences in public spaces. Binary categorization of modern versus traditional, secular versus religious, public versus private, and male versus female in urban studies should be carefully validated as Iranian women’s lived experiences challenge the homogenizing Western theories, particularly the predominant critics of modern public spaces in North America. The research process also highlights the benefits of geo-visualization in understanding the complex interaction between gender identities and the built environment.