scholarly journals The future urban growth under policies and its ecological effect in the Jing-Jin-Ji area, China

Heliyon ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. e06786
Author(s):  
Nana Li ◽  
Shiguang Miao ◽  
Yaoting Wang
Keyword(s):  
Urban Growth ◽  
Ecological Effect ◽  
The Future

scholarly journals Urban Growth, Real Estate Development and Indigenous Property: Simulating the Expansion Process in the City of Temuco, Chile

2021 ◽  
Vol 10 (2) ◽  
pp. 101
Author(s):  
Francisco Maturana ◽  
Mauricio Morales ◽  
Fernando Peña-Cortés ◽  
Marco A. Peña ◽  
Carlos Vielma
Keyword(s):  
Real Estate ◽  
Urban Growth ◽  
Urban Expansion ◽  
Indigenous Communities ◽  
Objective Evaluation ◽  
Real Estate Development ◽  
Territorial Planning ◽  
The Future ◽  
Urban Scenario ◽  
The City

Urbanization is spreading across the world and beyond metropolitan areas. Medium-sized cities have also undergone processes of accelerated urban expansion, especially in Latin America, thanks to scant regulation or a complete lack thereof. Thus, understanding urban growth in the past and simulating it in the future has become a tool to raise its visibility and challenge territorial planners. In this work, we use Markov chains, cellular automata, multi-criteria multi-objective evaluation, and the determination of land use/land cover (LULC) to model the urban growth of the city of Temuco, Chile, a paradigmatic case because it has experienced powerful growth, where real estate development pressures coexist with a high natural value and the presence of indigenous communities. The urban scenario is determined for the years 2033 and 2049 based on the spatial patterns between 1985 and 2017, where the model shows the trend of expansion toward the northeast and significant development in the western sector of the city, making them two potential centers of expansion and conflict in the future given the heavy pressure on lands that are indigenous property and have a high natural value, aspects that need to be incorporated into future territorial planning instruments.

scholarly journals Taking Implementation Seriously in the Evaluation of Urban Growth Management Strategies: “Safeguarding the Future” of the Antwerp City-Region

Land ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 159
Author(s):  
Clemens de Olde ◽  
Stijn Oosterlynck
Keyword(s):  
Urban Growth ◽  
Urban Areas ◽  
Growth Management ◽  
Management Strategies ◽  
Housing Prices ◽  
Policy Formulation ◽  
Land Values ◽  
Implementation Phase ◽  
The Future ◽  
Urban Growth Management

Contemporary evaluations of urban growth management (UGM) strategies often take the shape of quantitative measurements of land values and housing prices. In this paper, we argue that it is of key importance that these evaluations also analyse the policy formulation and implementation phases of growth management strategies. It is in these phases that the institutions and discourses are (trans)formed in which UGM strategies are embedded. This will enable us to better understand the conditions for growth management policies’ success or failure. We illustrate this point empirically with the case of demarcating urban areas in the region of Flanders, Belgium. Using the Policy Arrangement Approach, the institutional dynamics and discursive meanings in this growth instrument’s formulation and implementation phase are unravelled. More specifically, we explain how the Flemish strategic spatial planning vision of restraining sprawl was transformed into one of accommodating growth in the demarcation of the Antwerp Metropolitan Area, epitomised by two different meanings of the phrase “safeguarding the future.” In conclusion, we argue that, in Antwerp, the demarcation never solidified into a stable policy arrangement, rendering it largely ineffective. We end by formulating three recommendations to contribute to future attempts at managing urban growth in Flanders.

scholarly journals Neighbourhood [Re] Formation: Envisioning A Future For Don Mills

2021 ◽  
Author(s):  
Talayeh Rad
Keyword(s):  
Case Studies ◽  
Urban Growth ◽  
Urban Form ◽  
Urban Morphology ◽  
Recent History ◽  
Design Project ◽  
The Future ◽  
Unlimited Growth ◽  
New Vision ◽  
Future Growth

Architecture is known to be the physical language of community. What define cities are streets, blocks, and buildings, and their interaction defines the neighbourhoods. Cities are poised for unlimited growth (Lefebvre, 2003) and the challenge is to propose a vision for the future growth of already dense neighbourhoods. The research aims to study the evolution of contemporary urbanism, ideas, and theories in order to explore the structure of the existing neighbourhoods and understand the dynamic behind the street patterns and urban blocks. Case studies are investigating the quality and configuration of physical urban form through recent history. The ideas are compared and contrasted to challenge modern and post-modern urban theories in order to propose a new vision for future urban growth. The design project takes into account the importance of urban morphology and typology and their impacts on the identity, diversity and affordability of the neighbourhood.

scholarly journals Spatial Analysis Using Temporal Point Clouds in Advanced GIS: Methods for Ground Elevation Extraction in Slant Areas and Building Classifications

2019 ◽  
Vol 8 (3) ◽  
pp. 120 ◽  
Author(s):  
Sara Shirowzhan ◽  
Samad Sepasgozar
Keyword(s):  
Digital Elevation Model ◽  
Urban Growth ◽  
Urban Areas ◽  
Future Directions ◽  
3D Data ◽  
Contour Lines ◽  
Digital Elevation ◽  
The Future ◽  
Elevation Model ◽  
Skewness And Kurtosis

Deriving 3D urban development patterns is necessary for urban planners to control the future directions of 3D urban growth considering the availability of infrastructure or being prepared for fundamental infrastructure. Urban metrics have been used so far for quantification of landscape and land-use change. However, these studies focus on the horizontal development of urban form. Therefore, questions remain about 3D growth patterns. Both 3D data and appropriate 3D metrics are fundamentally required for vertical development pattern extraction. Airborne light detection and ranging (Lidar) as an advanced remote-sensing technology provides 3D data required for such studies. Processing of airborne lidar to extract buildings’ heights above a footprint is a major task and current automatic algorithms fail to extract such information on vast urban areas especially in hilly sites. This research focuses on proposing new methods of extraction of ground points in hilly urban areas using autocorrelation-based algorithms. The ground points then would be used for digital elevation model generation and elimination of ground elevation from classified buildings points elevation. Technical novelties in our experimentation lie in choosing a different window direction and also contour lines for the slant area, and applying moving windows and iterating non-ground extraction. The results are validated through calculation of skewness and kurtosis values. The results show that changing the shape of windows and their direction to be narrow long squares parallel to the ground contour lines, respectively, improves the results of classification in slant areas. Four parameters, namely window size, window shape, window direction and cell size are empirically chosen in order to improve initial digital elevation model (DEM) creation, enhancement of the initial DEM, classification of non-ground points and final creation of a normalised digital surface model (NDSM). The results of these enhanced algorithms are robust for generating reliable DEMs and separation of ground and non-ground points in slant urban scenes as evidenced by the results of skewness and kurtosis. Offering the possibility of monitoring urban growth over time with higher accuracy and more reliable information, this work could contribute in drawing the future directions of 3D urban growth for a smarter urban growth in the Smart Cities paradigm.

New Towns-In Town and Future Urban Growth: Some Preliminary Assessments

Prospects ◽  
1978 ◽  
Vol 3 ◽  
pp. 573-598
Author(s):  
Judith Martin
Keyword(s):  
Urban Growth ◽  
Urban Life ◽  
Large Measure ◽  
Half Century ◽  
New Towns ◽  
Urban Status ◽  
Limited Success ◽  
The Future ◽  
American Cities ◽  
The City

For over A half-century America has been an urban nation. However, a significant upsurge of concern for the cities has generally not accompanied the increasing acknowledgment of the country's urban status. In large measure, any serious governmental concern for American cities has been halfhearted. Attempts have been made to confront the problems of the nation's cities. Planners, enlightened city officials, and others have faced the intrinsic difficulty of bringing together thousands, and often millions, of individuals in a single municipal unit sometimes with limited success; but more often such attempts have been well-intentioned failures. Americans have yet to develop a consistent or coherent approach either to current urban dilemmas or to the future roles we envision for our cities. Though there are a multitude of regulations for almost every aspect of urban life, the phenomenon called “the city” continues to be as problematic for us today as it was for earlier generations of urban dwellers.

scholarly journals Neighbourhood [Re] formation: envisioning a future for Don Mills.

2021 ◽  
Author(s):  
Talayeh Rad
Keyword(s):  
Case Studies ◽  
Urban Growth ◽  
Urban Form ◽  
Urban Morphology ◽  
Recent History ◽  
Design Project ◽  
The Future ◽  
Unlimited Growth ◽  
New Vision ◽  
Future Growth

Architecture is known to be the physical language of community. What define cities are streets, blocks, and buildings, and their interaction defines the neighbourhoods. Cities are poised for unlimited growth (Lefebvre, 2003) and the challenge is to propose a vision for the future growth of already dense neighbourhoods. The research aims to study the evolution of contemporary urbanism, ideas, and theories in order to explore the structure of the existing neighbourhoods and understand the dynamic behind the street patterns and urban blocks. Case studies are investigating the quality and configuration of physical urban form through recent history. The ideas are compared and contrasted to challenge modern and postmodern urban theories in order to propose a new vision for future urban growth. The design project takes into account the importance of urban morphology and typology and their impacts on the identity, diversity and affordability of the neighbourhood.

scholarly journals MODELLING URBAN GROWTH FOR BANGKOK AND ASSESSING LINKAGES WITH ROAD DENSITY AND SOCIO-ECONOMIC INDICATORS

2019 ◽  
Vol XLII-4/W19 ◽  
pp. 255-262
Author(s):  
S. A. Kamarajugedda ◽  
E. Y. M. Lo
Keyword(s):  
Urban Growth ◽  
Urban Areas ◽  
Turning Point ◽  
Urban Expansion ◽  
Growth Patterns ◽  
Economic Indicators ◽  
Sustainable Urban Development ◽  
City Development ◽  
Road Density ◽  
The Future

Abstract. The fastest urbanization is occurring in the Global South which includes many developing nations in Asia. However, a rapid and unplanned urban growth could threaten the sustainability of the process. A key step towards a sustainable urban development is to better understand interdependencies amongst urban growth patterns, infrastructure and socio-economic indicators. Here we chose Bangkok, Thailand as a megacity case study to assess the spatio-temporal urban growth dynamics and specifically its dependency with road density at intra-city scales. The SLEUTH urban growth model is further applied for predicting future expansion over the next decade and to assess the future intra-city expansion. Urban expansion patterns for Bangkok were generated for 1987 and 2017 using Landsat derived urban land-cover maps. Open Street Map (OSM) is used to generate a 2017 road density map. The urban expansion (1987–2017) was observed to follow a radially outward expanding pattern inland, with the logarithmic urban expansion rate having an inverted concave trend with road density. The rising/falling limbs then indicated an increase/decrease of urban expansion for which a road density “turning point” is readily identified and further used to develop a road density-based zoning map that highlights the different intra-city urban expansion rates. The SLEUTH predicted urban growth till year 2027 which also showed expansion outward from existing urban areas. The future expansion trend is also consistent with the turning point trend. This study showed that such spatial-temporal analysis of urban expansion coupled with SLEUTH can be useful for investigating likely outcomes of city development plans.

Theorisations of African cities need to be careful of jumping onto the ‘urban band wagon’

2020 ◽  
Vol ahead-of-print (0) ◽  
pp. 1-10
Author(s):  
Mfaniseni Fana Sihlongonyane
Keyword(s):  
Urban Growth ◽  
Economic Transformation ◽  
African Continent ◽  
African Cities ◽  
The World ◽  
The Future

The observation that cities are growing rapidly especially in the African continent is well acknowledged around the world. Indeed, ‘an urban-centric discourse’ has emerged to assert that the future is ‘urban’ as more people are moving to live in cities (UN, 2018). While the issue of growth cannot be challenged, one needs to look at the dangers of this discourse in African cities. The dynamics of urban growth in African cities are more complex and different from industrialised Europe from which this discourse is modelled. Hence, the patterns of contemporary urban growth and economic transformation in Africa might well undermine assumed urban-centric theoretical associations.

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