Urban density is a central concern in sustainable city-making, yet it is often reduced to simple quantitative measures such as population per hectare or Floor Space Index. This paper argues that density must be understood through the lens of urban morphology to be meaningful as a basis for action. Drawing on typological comparisons across four London neighbourhoods – Marylebone, Brixton, Lewisham, and Stoke Newington – it introduces a comparative framework that combines conventional metrics with morphological characteristics such as plot grain, land-use mix and block structure to evaluate how density translates into lived urban experience. Beyond analysis, the study applies these insights to Silvertown, a new London neighbourhood currently in development, which serves as a design testbed for implementing spatial lessons from established urban forms. This case demonstrates how design-led planning can shape block structure, street hierarchy and plot subdivision to support density through spatial quality, not numerical targets alone. This integration of comparative analysis and applied design advances a structured analytical methodology that links morphological variables to regulatory practice in compact city-making. While grounded in London, the framework offers analytical principles that may inform cities worldwide seeking resilient, inclusive, and context-sensitive approaches to urban intensification.
Abstract This study addresses the challenge of identifying belts with specific morphological characteristics within American metropolitan contexts. This challenge arises from uninterrupted urban expansion, the absence of pre-industrial fixation lines, and morphological ambiguities caused by laissez-faire governance and rapid infrastructural change. Nevertheless, many American urban cores are surrounded by belts with relatively low urban densities and ground coverage. One could view these as ‘core belts’ – areas with similar morphological characteristics to fringe belts, yet with different origins and locations. To define and demonstrate their existence, the study connects foundational urban morphological theories on fringe belts to the Chicago School legacy of Burgess’s concentric zone model. A first example is analyzed using the Spacemate model, with downtown Detroit serving as a case study. Employing Spacemate’s capacity to quantitatively assess urban density and form, the research finds distinctive morphological characteristics of ‘core belts’ emerging in downtown Detroit in the early twentieth century, tracing its expansion and exacerbation in the following decades. This trajectory is traced by examining built floor density, building ground coverage, and network density, and finds subtle differences in the trajectory of two core belts. Furthermore, the belts’ quantitative manifestations are linked to underlying internal and external forces of core belt formation, including car-based erosion, urban renewal, and recent privatization of downtown districts. The conceptualization and demonstration of the core belt empirically connect the morphological concept of fringe belt formation with the Chicago School ecological concept of the concentric ring and zone in transition, while also demonstrating the methodological utility of Spacemate in diachronic morphological analysis.
The burial and culverting of urban streams during twentieth-century urbanization severed the relationship between natural hydrological systems and the built environment, resulting in the loss of critical ecosystem services. While urban waterways are often perceived as barriers to movement, their reinstatement at ground level through ‘stream daylighting’ presents an opportunity to reconfigure urban form in ways that support both ecological and social resilience. This study investigates the impact of stream daylighting on pedestrian network connectivity in Zurich, Switzerland. Using a comparative spatial analysis of pre-and post-daylighting conditions, the study employs a configurational approach based on metric reach within a GIS environment. Historic georeferenced maps from 1984 were digitized and compared with 2020 open-access spatial data to assess changes in route network connectivity. These quantitative findings are complemented by photographic documentation to evaluate the urban design interventions accompanying daylighting projects. Contrary to the assumption that reinstating streams at ground level disrupts connectivity, the results reveal that daylighting in Zurich often enhances pedestrian accessibility. This is achieved through integrated urban design strategies, such as the inclusion of footbridges and the creation of new public spaces, which maintain or improve existing route networks. These findings underscore the potential of stream daylighting not only as a nature-based solution for stormwater management and climate adaptation, but also as a contributor to cultural ecosystem services – supporting active mobility, place-making, and the reintegration of nature into the urban fabric. The study highlights the importance of morphological analysis in understanding how ecological restoration can be harmonized with urban connectivity and resilience.
