scholarly journals Urban Parcel Grouping Method Based on Urban Form and Functional Connectivity Characterisation

2019 ◽  
Vol 8 (6) ◽  
pp. 282
Author(s):  
Wu ◽  
Zhang ◽  
Li ◽  
Dale ◽  
Ding ◽  
...  
Keyword(s):  
Functional Connectivity ◽  
Urban Form ◽  
Urban Areas ◽  
Urban Morphology ◽  
Human Cognition ◽  
Practical Significance ◽  
Urban Structure ◽  
Functional Regions ◽  
Grouping Method ◽  
Function Discovery

The grouping of parcel data based on proximity is a pre-processing step of GIS and a key link of urban structure recognition for regional function discovery and urban planning. Currently, most literature abstracts parcels into points and clusters parcels based on their attribute similarity, which produces a large number of coarse granularity functional regions or discrete distribution of parcels that is inconsistent with human cognition. In this paper, we propose a novel parcel grouping method to optimise this issue, which considers both the urban morphology and the urban functional connectivity. Infiltration behaviours of urban components provide a basis for exploring the correlation between morphology mechanism and functional connectivity of urban areas. We measured the infiltration behaviours among adjacent parcels and concluded that the occurrence of infiltration behaviours often appears in the form of groups, which indicated the practical significance of parcel grouping. Our method employed two parcel morphology indicators: the similarity of the line segments and the compactness of the distribution. The line segment similarity was used to establish the adjacent relationship among parcels and the compactness was used to optimise the grouping result in obtain a satisfactory visual expression. In our study, constrained Delaunay triangulation, Hausdorff distance, and graph theory were employed to construct the proximity, delineate the parcel adjacency matrix, and implement the grouping of parcels. We applied this method for grouping urban parcel data of Beijing and verified the rationality of grouping results based on the quantified results of infiltration behaviours. Our method proved to take a good account of infiltration behaviours and satisfied human cognition, compared with a k-means++ method. We also presented a case using Xicheng District in Beijing to demonstrate the practicability of the method. The result showed that our method obtained fine-grained groups while ensuring functional regions-integrity.

Exploring the relationships between urban form metrics and the vegetation biomass loss under urban expansion in China

2018 ◽  
Vol 47 (3) ◽  
pp. 363-380
Author(s):  
Tong Zhang ◽  
Sophia Shuang Chen ◽  
Guangyu Li
Keyword(s):  
Urban Form ◽  
Urban Areas ◽  
Yangtze River ◽  
Green Space ◽  
Yangtze River Delta ◽  
Urban Morphology ◽  
Total Biomass ◽  
Urban Metrics ◽  
Biomass Loss ◽  
Loss Index

Compact urban form has been applied as a strategy to reduce the loss of green space that occurs from development, but the impact of this policy on the provision of green space still presents many uncertainties. This research investigated the statistical relationship between urban form indicators and the loss of vegetation biomass to understand the response of quality green space provision to changes in urban morphology. A methodology combining multi-source data assimilation, statistical analysis, and spatial analysis was adopted for the Yangtze River Delta cities of China. First, six urban metrics were selected to describe the shape and layout of urban patches in each city, and the total biomass loss index was then introduced as a parameter. The values of urban metrics and total biomass loss index were calculated for the 50 Yangtze River Delta cities. Second, ordinary least squares regression and geographically weighted regression analyses were then used to establish a quantitative relationship between total biomass loss index and urban form indicators. The results revealed an extremely negative correlation between total biomass loss index and the three urban variables of Richard compactness, density gradient, and the Gini coefficient; moreover, the parameter estimates for the three variables in the geographically weighted regression model were local and varied over space. Third, the mechanisms by which the urban form influences biomass loss were discussed and different urban form planning strategies for particular urban areas were suggested. In conclusion, compact urban form in a clustered layout of urban areas with a dense central agglomeration was verified to be ecologically superior and conducive to green space protection. For the physical interpretation of the statistical relationship between urban morphology and vegetation loss, the interface effect of urban agglomeration on vegetation merits further study.

scholarly journals Topological analysis of contemporary morphologies under conflict: The urban transformation of Dobrinja in Sarajevo and the Central District of Beirut

2017 ◽  
Author(s):  
Inés Aquilué ◽  
Estanislao Roca ◽  
Javier Ruiz
Keyword(s):  
Civil War ◽  
Urban Form ◽  
Urban Areas ◽  
Urban Morphology ◽  
Specific Method ◽  
Evolutionary Analysis ◽  
Lebanese Civil War ◽  
Post Conflict ◽  
Bosnian War ◽  
Central District

Regarding topological interpretation of space, this research aims to identify urban morphologies, whose topology becomes increasingly determining under high uncertainty. This topological approach has been applied in an evolutionary analysis of urban spaces under siege, fear and conflict, which conducted to the construction of a specific method. This method analyses the transformation of urban areas in five consecutive phases: urban form [1], increase of uncertainty [2], application of the apparatus [3], change in urban form [4], information flows [5]. These five phases were applied to different empirical studies, analysed through specific morphological and topological models. In the light of this method, two selected urban morphologies Dobrinja –a suburb in Sarajevo– and the Beirut Central District have been examined. The urban morphology of both areas was dramatically transformed after both civil conflicts –the Bosnian War and the Lebanese Civil War–. Dobrinja suffered severe modifications, first provoked by the violence of the siege during the Bosnian War [1992-1995], and then by the Inter-Entity Boundary Line as a result of the Dayton Peace Agreement [December 1995], which divided the neighbourhood and caused serious alterations in its ethno-demographic and spatial structure. The Beirut Central District was first destroyed by the violence experienced in the Lebanese Civil War [1975-1990] and then by the process of subsequent reconstruction [since 1992], which led to a simplification of its structure. The two morphological and topological analyses enable us to determine the initial causes and their spatial consequences in both urban areas, regarding their conflict and post-conflict stage.

Neighbourhood Environmental Contribution and Health. A novel indicator integrating urban form and urban green

2018 ◽  
Vol 4 (1) ◽  
pp. 46-51 ◽  
Author(s):  
Harald Zepp ◽  
Luis Inostroza ◽  
Robynne Sutcliffe ◽  
Salman Ahmed ◽  
Susanne Moebus
Keyword(s):  
Urban Form ◽  
Urban Areas ◽  
Regression Models ◽  
Spatial Relationship ◽  
Urban Structure ◽  
Urban Green ◽  
Self Rated Health ◽  
Environmental Contribution ◽  
Neighbourhood Scale ◽  
The Relationship

Abstract The relationship between urban green, urban form and health remains unclear. This research explores health and urban green as well as urban structure as constituents of urban form. The objective was to develop a novel indicator (Neighbourhood Environmental Contribution, NEC) to analyse the spatial relationship between urban green and health (diabetes, mental health and self-rated health) on the neighbourhood scale. NEC performs more stably when regression models are adjusted for confounders. This suggests that better representations of urban form including the built-up structure of urban areas are promising.

scholarly journals Spatial integration processes of mass housing estates. The case of Madrid.

2017 ◽  
Author(s):  
Sergio García-Pérez ◽  
Borja Ruiz-Apilánez Corrochano
Keyword(s):  
Urban Form ◽  
Urban Areas ◽  
Initial Conditions ◽  
Space Syntax ◽  
Urban Structure ◽  
Spatial Integration ◽  
Economic Dimension ◽  
Mass Housing ◽  
Improvement Strategies ◽  
Housing Estates

Deprived urban areas regeneration is one of the most important challenges of our cities, which interest is recognised by International Urban Guidelines (ONU), as well as Leipzig Charter and Toledo Declaration (European Union). At this respect, systematic analysis of built city obsolescence is crucial to propose improvement strategies. In particular, mass housing estates, characteristic urban form from modern urbanism, have been detected by several studies as one of the most vulnerable urban forms. Moreover, several studies had determined the systemic nature of problems that this urban form has develop, where physical, social, and economic dimension are strongly related. The low level of spatial integration of the housing estate in the city urban structure could be one of the problems and, in part, responsible of that urban obsolescence. In addition, fifty years after its construction, the continued growth of cities sometimes has modified initial conditions and consequently study the integration evolution of mass housing estates is needed. At this sense, it has been shown that Space Syntax methodology could be a useful tool. The aim of this study is, on the one hand, study criteria to apply Space Syntax methodology to the integration evolution study, and on the other hand, know the integration processes of mass housing estates to propose improvement strategies. Methodology includes, data collection and definition of analysis scenarios adapted to Spanish dataset, Space Syntax methodology in a evolutive approach in two stages: 1970s and 2010s, and interpretation of evolution results. The methodology is tested for Madrid mass housing estates.

scholarly journals Urban form and vacant shops: can one explain the other? – a case study in Portugal

2017 ◽  
Author(s):  
Miguel Saraiva ◽  
Teresa Sá Marques ◽  
Paulo Pinho
Keyword(s):  
Urban Form ◽  
Urban Areas ◽  
Positive Association ◽  
Urban Morphology ◽  
Negative Effects ◽  
Economic Market ◽  
New Developments ◽  
Morphological Variables ◽  
The City

Shopping is much more than a wealth-generator in post-modern societies; it is intrinsically linked with the way people experience the city and an indivisible part of their day-to-day social experiences. Consequently, the literature has gradually recognized that commercial geographies are not just a consequence of economic market logics. It has been proven that there is a relationship between store-types and urban morphology, and that commerce is an important catalyst for urban regeneration and revitalization. Thus, the urban form can also be a cause for the lack of success of a shop. The amount of vacant shops has been signaled as an important problem in urban areas, affecting the structure and the identity of neighborhoods, and reflects the negative effects of the economic-crisis. Strategies to overcome this problem are usually economically-oriented and fail to capitalize on the new-found relationships between store-success and urban morphology. Thus this research wishes to test whether there are indeed correlations between specific morphological features and the existence of vacant shops, and consequently to propose how changes in the urban environment can contribute to overcome, and even prevent, such cases. The geographical distribution of vacant shops in a sample of Portuguese cities was set against morphological variables such as building age or centrality in the network (Space Syntax). Positive association was found, for example, between new developments and vacant shops, questioning the need for more store space in certain areas; and, particularly outside central neighborhoods, between open shops and high ‘choice’ (rather than high ‘integration’) axes.

scholarly journals Uncovering the Morphology of Kōm ad-Dikka in Alexandria

2018 ◽  
Author(s):  
Mirhan Damir
Keyword(s):  
Urban Form ◽  
Urban Morphology ◽  
Residential Area ◽  
Historical Period ◽  
Urban Structure ◽  
Morphological Transformation ◽  
Modern Period ◽  
History Of ◽  
Physical Impact ◽  
The City

The historical residential area of Kōm ad–Dikka in Alexandria has experienced subsequent morphological transformation since the ancient era until present. Each historical period had a physical impact on the city’s urban structure that in turn struggled to survive its successive one with its different urban conception. However, the sinuous streets of this area, which probably date back to the late Egyptian Medieval period, are characterized as the only surviving organic fabric intra–muros that was not altered during the Egyptian Modern period. This paper elaborately investigated the chronological history of the historical residential area since the ancient era until the mid—twentieth century. Based on in–depth investigation of historical maps and memoirs, it revealed the possible reasons behind its extant sinuous urban form and postulated reconstructions of its urban morphology through sequential phases.

scholarly journals From the so-called Islamic City to the Contemporary Urban Morphology: the Historic Core of Kermanshah City in Iran as a Case Study

2017 ◽  
Author(s):  
Sahar Pakseresht ◽  
Manel Guardia Bassols
Keyword(s):  
Urban Form ◽  
Arab World ◽  
Urban Morphology ◽  
Urban Transformation ◽  
Urban Structure ◽  
Provincial City ◽  
Analytical Review ◽  
History Of ◽  
Urban Transformations ◽  
Social Use

Sahar Pakseresht¹, Manel Guàrdia Bassols¹ ¹ Department of Theory and History of Architecture. Polytechnic University of Catalonia (UPC). Av. Diagonal, 64908028 Barcelona, Tel:93-4017874 E-mail: [email protected], [email protected] Keywords: Iranian city, Kermanshah, urban morphology, Islamic city, urban transformation, Modernisation Conference topics and scale: City transformations, urban form and social use of space     Pre-1920 cities in Iran are characterized by a number of features considered to be typical of the so-called “Islamic city”. A set of features are shared by traditional cities where dominated by Islam religion. The notion of “Islamic city”, often criticised for its Eurocentric nature, has guided most studies of these traditional cities. The modernisation process in so-called Islamic cities is crucial due to its serious impacts on the traditional morphology and transformation of their urban structure. We, thus, need more holistic and integrated understanding about changes of these cities derives from the modernisation process.  In order to explore the broad and wide-spread changes due to modernisation process in the traditional cities in Muslim world, it is more enlightening if we study second order cities, rather than studying the transformations of major capitals such as Cairo, Istanbul or Teheran, where interventions are goal to approach a more exceptional and rhetorical characters. Therefore, the aim of this paper is to study the historic core of Kermanshah city, to understand the link between urban transformations and social due to modernisation process by tracing it historically. We will focus, particularly, on studying the stages of urban transformation and changes of urban morphology as well as conflict and differences between traditional urban features with the modern ones. For example, we are interested in understanding how traditional morphology and structure of residential and commercial zone are affected by the opening of new and wide boulevards in course of modernisation process, and how these changes influence everyday people life.   References Kheirabadi, M. (2000). Iranian cities: formation and development. Syracuse University Press. Clarke, J. I., & Clark, B. D. (1969). Kermanshah: an Iranian provincial city (No. 10). University of Durham, Department of Geography. Bonine, M. E. (1979). THE MORPHOGENESIS OF IRANIAN CITIES∗. Annals of the Association of American Geographers, 69(2), 208-224. Stefano Bianca. (2000). Urban form in the Arab world: Past and present (Vol. 46). vdf Hochschulverlag AG. Habibi, M. (1996). Az shar ta Shahr (de la Cite a la Ville). Analytical review of the city concept and its physical image in the course of time), Tehran: University of Tehran. (In Persian)

scholarly journals GEOSPATIAL TECHNOLOGY APPROACHES IN URBAN MORPHOLOGY FOR RESILIENT URBAN GOVERNANCE

2014 ◽  
Vol 12 (3) ◽  
Author(s):  
Norzailawati Mohd Noor ◽  
Marina Mohd Nor ◽  
Alias Abdullah ◽  
Rustam Khairi Zahari
Keyword(s):  
Land Use ◽  
Urban Planning ◽  
Urban Form ◽  
Urban Governance ◽  
Rapid Development ◽  
Urban Morphology ◽  
Geographical Information ◽  
Urban Structure ◽  
Geospatial Technology ◽  
Land Use Development

This study analysed the potential of applications of geospatial technology in urban planning research in urban morphology. Urban morphology is the study of the form of human settlements and the process of their formation and transformation. It is an approach in designing urban form that considers both physical and spatial components of the urban structure. This study was conducted in Georgetown, Penang with the main purpose to identify the evolution of urban morphology and the land use expansion using remote sensing images and Geographical Information System (GIS) technique. Four series of temporal satellite SPOT 5 J from 2004, 2007, 2009, and 2014 were used to detect an expansion of land use development using change detection technique. Three types of land use were identified, namely built-up area, unbuilt-up area, and water bodies with a good accuracy of above 85%. The result showed that the built-up area significantly increased due to the rapid development in urban area. Finally, the result provided an understanding and strengthened the relationship between urban planning and geospatial applications in creating sustainable and resilient city and future urban governance.

scholarly journals The urban form in the city of Tulcán, Carchi - Ecuador

2017 ◽  
Author(s):  
Yolanda María Tapia ◽  
Adolfo Vigil-de-Insausti ◽  
María Dolores Montaño
Keyword(s):  
Green Infrastructure ◽  
Urban Form ◽  
Urban Landscape ◽  
Urban Morphology ◽  
Capital City ◽  
Internal Space ◽  
Urban Structure ◽  
Environmental Resources ◽  
North West ◽  
The City

Yolanda Tapia¹, Adolfo Vigil de Insausti¹, María Dolores Montaño ² ¹ Escuela Técnica Superior de Arquitectura de Valencia, UPV. Camino de Vera, s/n. 46022 Valencia, ²Pontificia Universidad Católica del Ecuador, PUCE. Av. 12 de Octubre 1076, Vicente Ramón Roca, Quito, Ecuador E-mail: [email protected], [email protected], [email protected] Keywords: Tulcán, Ecuador, urban, landscape, history Conference topics and scale: The Urban Form, “City and territory in the globalization age”   Tulcán, located north in Ecuador is the capital of the province of Carchi. It is a city especially commercial and agricultural whose urban morphology responds to historical, environmental and administrative circumstances, that is how, since 1851, the date on which the “cantonization” takes place begins the formation of the capital city with an urban structure formed in checkerboard that welcomes the traditional nucleus of the typical city of the ecuatorian highlands. With the development of this city, isolated neighborhoods are born out of the original urban fabric that expand in the territory, following the main road connections, eventually to fill the internal space with a morphology of contrasts, as each neighborhood or new occupations are structured individually without thinking of a city of integral formation. The longitudinal growth of the city was marked from its beginning by the river Bobo to the north-west and the river Tajamar to the south-east that keep the city within natural limits, which also provide certain environmental and landscape benefits, however in the the last few decades the city has had a significant growth that threatens an unattended and constantly expanding periphery to these environmental resources. We are facing a heterogeneous city, with problems and possibilities and attending to the idea that the city is an unfinished work, integral and sustainable urban regeneration is the basis for a reordering and a new urban approach. It is therefore proposed to study three strategic lines: the existing city, its internal circuits of connection and the adjacent nature. Establishing initial uses in the city, to occupy the predominant urban void and thus to activate the pubic space. Restructure mobility, which will strengthen the use of new peripheral road infrastructures to reduce motorized circuits in the interior, thus promoting the use of bicycles and the creation of pedestrian routes. Finally, environmental resources will again have the value of landscape and ecological wealth producing around the city a green infrastructure that contains growth and is the link of this with the countryside. References Beery, B. (1975) ‘Consecuencias humanas de la urbanización’, Madrid: Pirámide Hernández, A. (2001) ‘La ciudad estructurada’, en Boletín CF+S 15 Calidad de vida urbana: variedad, cohesión y medio ambiente. (http://habitat.aq.upm.es/boletin/n15/aaher.html) Huertas Nadal, D. (2012) ‘I making Heterotopías, laboratorio de estrategias urbanas’, Vitoria: Universidad Francisco Vitoria Lopez de Lucio, R. (2007) ‘Construir ciudad en la periferia’, Madrid: ETS Arquitectura (UPM) Urbanística y ordenación del territorio Solá-Morales, M. (1997) ‘Las formas del crecimiento urbano’, Barcelona:Universitat Politécnica de Catalunya

scholarly journals The heterogeneity and change in the urban structure of metropolitan areas in the United States, 1990–2010

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Stefan Leyk ◽  
Deborah Balk ◽  
Bryan Jones ◽  
Mark R. Montgomery ◽  
Hasim Engin
Keyword(s):  
United States ◽  
Urban Form ◽  
Urban Areas ◽  
The United States ◽  
Data Series ◽  
Urban Structure ◽  
Change Analysis ◽  
Block Level ◽  
Urban Places ◽  
Over Time

AbstractWhile the population of the United States has been predominantly urban for nearly 100 years, periodic transformations of the concepts and measures that define urban places and population have taken place, complicating over-time comparisons. We compare and combine data series of officially-designated urban areas, 1990–2010, at the census block-level within Metropolitan Statistical Areas (MSAs) with a satellite-derived consistent series on built-up area from the Global Human Settlement Layer to create urban classes that characterize urban structure and provide estimates of land and population. We find considerable heterogeneity in urban form across MSAs, even among those of similar population size, indicating the inherent difficulties in urban definitions. Over time, we observe slightly declining population densities and increasing land and population in areas captured only by census definitions or low built-up densities, constrained by the geography of place. Nevertheless, deriving urban proxies from satellite-derived built-up areas is promising for future efforts to create spatio-temporally consistent measures for urban land to guide urban demographic change analysis.

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