scholarly journals Three-Dimensional Urban Expansion Analysis of Valley-Type Cities: A Case Study of Chengguan District, Lanzhou, China

2019 ◽  
Vol 11 (20) ◽  
pp. 5663 ◽  
Author(s):  
Sijia He ◽  
Xiaoyun Wang ◽  
Jingru Dong ◽  
Baocheng Wei ◽  
Hanming Duan ◽  
...  
Keyword(s):  
Urban Planning ◽  
Urban Development ◽  
Urban Expansion ◽  
Three Dimensional ◽  
Vertical Dimension ◽  
Physical Growth ◽  
Mountain Area ◽  
Expansion Speed ◽  
Horizontal Expansion ◽  
Valley Type

The development of cities in the vertical dimension is important in valley-type cities where physical growth is limited by terrain. However, little research has focused on three-dimensional urban expansion of valley-type cities. Lanzhou is a typical valley-type city in China and Chengguan District is the core area of Lanzhou City. This research is aimed at understanding the development of valley-type cities through the analysis of the three-dimensional urban expansion of Lanzhou Chengguan District and providing a reference for urban planning. We extracted five periods of architectural contours and height information between 1975 to 2018 with the support of multi-source remote sensing and network data. We used overlay analysis and mathematical statistical methods to analyze urban horizontal expansion and used the building density, floor area ratio, vertical expansion speed, fluctuation degree, and skyline to analyze urban vertical expansion. We found that the mode of horizontal expansion of Chengguan District shifted from adjacency to enclave through mountain area reclamation. The area with the fastest vertical expansion speed first appeared in the horizontal expansion completed area, and then in both the rapid horizontal expansion area and in the horizontal expansion completed area. Before 2007, the speed of horizontal expansion increased and reached its peak while the vertical expansion speed was relatively stable. After that, the former decreased, and the vertical expansion increased rapidly and dominated the urban development. The vertical expansion of the valley-type city gradually dominates urban development. Urban planning should consider the three-dimensional expansion, especially in the vertical dimension.

scholarly journals Urban Sprawl: Environmental Consequence of Rapid Urban Expansion

2020 ◽  
Vol 5 (6) ◽  
pp. 110-118
Author(s):  
Ibimilua Adewale Festus ◽  
Ibimilua Foyeke Omoboye ◽  
Ogundare Babatope Andrew
Keyword(s):  
Land Use ◽  
Urban Development ◽  
21St Century ◽  
Urban Sprawl ◽  
Urban Expansion ◽  
Population Expansion ◽  
Wildlife Habitat ◽  
Physical Growth ◽  
Sustainable Urban Development ◽  
Population Increase

Urban Sprawl is a disturbing issue to geographers, urban planners and allied professionals in the 21st century.  The anxiety is based mainly on the social, political, economic, cultural and environmental consequences of rapid urban growth.  Hence, this study examines the reasons for urbanization, as well as encroachment of urban development into the border belt.  Next, the study probes into the causes, consequences and adverse effects of uncontrolled infringement and conversion of rural land to urban uses.  Likewise, the study investigates the processes of land use development, population expansion and physical growth, as well as their ecological foot prints.  Consequently, the study identified the major causes of urban sprawl as rapid population increase, high level of urban development pressure, provision of housing, changes in living standard, as well as technological changes among others.  Also, the study found out that urban sprawl is desirable because of the benefits of spread of development, low rent at the periphery, as well as lesser pressure on the environment of the border belt.  Also, the effects of urban sprawl were recognized as destruction of the means of livelihood of the rural dwellers at the urban fringe belt, land fragmentation, food scarcity, changes in the ecosystem, environmental pollution, biodiversity loss, as well as loss of wildlife habitat.  For the achievement of sustainable urban development in the 21st century and beyond, the study recommends environmental monitoring with the aid of geographic information systems and remote sensing techniques, environmental impact assessment, development control, farm land policy, regulation of land allocation, sustainable land use management, as well as enforcement of planning policies.

scholarly journals Technological Advancement in Mapping of Heritage by Using GIS (Mapping of Heritage: Preservation for the Future)

2017 ◽  
Vol 2 (4) ◽  
pp. 11
Author(s):  
Rummana Khan Sherwani
Keyword(s):  
Urban Development ◽  
Urban Expansion ◽  
Three Dimensional ◽  
Vital Role ◽  
Conservation Strategies ◽  
Gis Mapping ◽  
Historic Buildings ◽  
Technological Advancement ◽  
Art And Design ◽  
Heritage Sites

Lahore the historic city is expanding day by day. The urban expansion affected the heritage boundaries, results into shrinking and deteriorating the precious structures. The study aims to map the historic sites by looking into it the impacts of urban development through boundary delineation process. The pictorial journey elaborates how the precious heritage are being packed into haphazard containers of irregular boundaries, which vanished the beautiful impacts of Mughal gardens around the historic structures helplessly standing there to feel pity in them. In order to improve the effectiveness of preservation strategies the role of new digital technologies such as GIS has played their vital role in the building conservation strategies. This paper presents the results of a research developed as part of the research project conducted by the researcher in college of Art and Design, School of Architecture, University of the Punjab, Lahore, Pakistan. The aims of the study were to explore the implementation of GIS as a conservational specialist in the field of conservational management, to deal the various aspects facing while managing the Mughal sites widely spreading the study area in the 3-D environment and using the GIS analytical tools to determine the urban development impacts on historic buildings. This study fills the gap between the CAD and three dimensional environment and integrating GIS from scanned images of heritage sites or photogrammetric data to the library of parametric architectural objects of the historic buildings and represent in the form of overlay layers. A framework of modeling, 3D geometry, topology, semantic, appearance properties, efficient management and analysis of the relevant data to the heritage sites are used in the research.

scholarly journals Expansion and Evolution of a Typical Resource-Based Mining City in Transition Using the Google Earth Engine: A Case Study of Datong, China

2021 ◽  
Vol 13 (20) ◽  
pp. 4045
Author(s):  
Minghui Xue ◽  
Xiaoxiang Zhang ◽  
Xuan Sun ◽  
Tao Sun ◽  
Yanfei Yang
Keyword(s):  
Urban Planning ◽  
Urban Development ◽  
Urban Expansion ◽  
Social Economy ◽  
Google Earth ◽  
Geographical Information ◽  
Human Society ◽  
Spatial Transformation ◽  
Mining City ◽  
Google Earth Engine

China's resource-based cities have made tremendous contributions to national and local economic growth and urban development over the last seven decades. Recently, such cities have been in transition from resource-centered development towards human-oriented urbanization to meet the requirements of long-term sustainability for the natural environment and human society. A good understanding of urban expansion and evolution as a consequence of urbanization has important implications for future urban and regional planning. Using a series of remote sensing (RS) images and geographical information system (GIS)-based spatial analyses, this research explores how a typical resource-based mining city, Datong, has expanded and evolved over the last two decades (2000–2018), with a reflection on the role of urban planning and development policies in driving the spatial transformation of Datong. The RS images were provided and processed by the Google Earth Engine (GEE) platform. Spatial cluster analysis approaches were employed to examine the spatial patterns of urban expansion. The results indicate that the area of urban construction land increased by 132.6% during the study period, mainly along with the Chengqu District, the Mining Area, and in the southeast of the Nanjiao District, where most new towns are located. Reflection on the factors that influence urban expansion shows that terrain, urban planning policies, and social economy are driving Datong’s urban development.

scholarly journals Simulation and prediction of Shanghai urban spatial change based on random forest and CA-Markov model

2019 ◽  
Vol 1 ◽  
pp. 1-1
Author(s):  
Xuewei Dang ◽  
Liang Zhou ◽  
Xiaoen Li ◽  
Haowei Mu ◽  
Lei Che ◽  
...  
Keyword(s):  
Urban Planning ◽  
Urban Development ◽  
Urban Growth ◽  
Urban Expansion ◽  
Urban Land ◽  
Urban Land Use ◽  
City Center ◽  
Urban Simulation ◽  
The City ◽  
Red Line

<p><strong>Abstract.</strong> In the context of rapid urbanization, accurate assessment of urban expansion has become increasingly important for urban sustainable development, and smart growth theory has been put forward to avoid urban sprawl. Previous studies about urban expansion simulation focused only on ecological constrain which prevent urban growth from developing in specific regions. However, government decision-making and urban planning greatly influence urban development and limit the disorderly expansion of the urban. In this paper, we consider planning policies into urban simulation and uses the ecological protection red line, farmland protection red line and cultural protection control line as limiting factors for future urban simulation. Choosing Shanghai as the study area, we integrated Random Forests Algorithm (RFA), Markov chain and Cellular Automata (CA) to simulate urban expansion in 2015, and further predict the urban expansion in 2020, 2025 and 2030. The results show that the overall accuracy of urban land use simulation in 2015 is 93.86%, and the kappa coefficient is 0.8577. The model has a good simulation effect. Furthermore, the predicted results in 2020, 2025 and 2030 show that the urban land area in Shanghai is still increasing, and the spatial distribution of urban land has obvious circle structure and regional differences. The urban areas within 10km from the city center are growing slowly, and the region within 30km from the city center is growing faster, and there are more new urban points from 2025 to 2030. But in the area 30km away from the city center, different administrative areas show different urban growth phenomena. Among them, there are a large number of new urban points in the junction area between Songjiang District and Jinshan District, which may be the focus of future urban development planning in Shanghai. The proposed model and the results can help planners study the evolution of urban patterns and develop further urban planning.</p>

SCIENTIFIC APPROACHES TO THE DEVELOPMENT OF PLANNING DOCUMENTATION FOR THE UNITED TERRITORIAL COMMUNITIES

2018 ◽  
pp. 42-48
Author(s):  
Olha Dorosh ◽  
Iryna Kupriyanchik ◽  
Denys Melnyk
Keyword(s):  
Land Use ◽  
Urban Planning ◽  
Urban Development ◽  
Land Management ◽  
Planning Process ◽  
Town Planning ◽  
Land Use Systems ◽  
The Law ◽  
Land Use Development

The land and town planning legislation concerning the planning of land use development within the united territorial communities (UTC) is considered. It is found that legislative norms need to be finalized. The necessity of updating the existing land management documentation developed prior to the adoption of the Law of Ukraine "On Land Management" and changes in the structure of urban development in connection with the adoption of the Law of Ukraine "On Regulation of Urban Development" was proved as they do not ensure the integrity of the planning process within the territories of these communities through their institutional incapacity (proved by the example of the Palan Unified Territorial Community of the Uman district of the Cherkasy region). The priority of land management and urban planning documents as the most influential tools in planning the development of land use systems in UTC is scientifically grounded and their interdependence established.

scholarly journals Study on the Urban Fringe Based on the Expansion–Shrinking Dynamic Pattern

2021 ◽  
Vol 13 (10) ◽  
pp. 5718
Author(s):  
Changqing Sui ◽  
Wei Lu
Keyword(s):  
Land Use ◽  
Urban Planning ◽  
Land Use Planning ◽  
Urban Landscape ◽  
Rapid Development ◽  
Urban Expansion ◽  
Urban Fringe ◽  
Spatial Form ◽  
Architectural Form ◽  
Ecological Protection

The urban fringe, as a part of an urban spatial form, plays a considerably major role in urban expansion and shrinking. After decades of rapid development, Chinese cities have advanced from a simple expansion stage to an expansion–shrinking-coexistence stage. In urban shrinking and expansion, the urban fringe shows different characteristics and requirements for specific aspects such as urban planning, land use, urban landscape, ecological protection, and architectural form, thereby forming expanding and shrinking urban fringes. A comprehensive study of expanding and shrinking urban fringes and their patterns is theoretically significant for urban planning, land use, planning management, and ecological civilisation construction.

scholarly journals From TOD to TAC: Why and How Transport and Urban Policy Needs to Shift to Regenerating Main Road Corridors with New Transit Systems

Urban Science ◽  
2021 ◽  
Vol 5 (3) ◽  
pp. 52
Author(s):  
Peter Newman ◽  
Sebastian Davies-Slate ◽  
Daniel Conley ◽  
Karlson Hargroves ◽  
Mike Mouritz
Keyword(s):  
Urban Planning ◽  
Urban Development ◽  
Urban Policy ◽  
Land Development ◽  
Transit Oriented Development ◽  
Transit Systems ◽  
Historical Perspectives ◽  
Early Case ◽  
Entrepreneurship Theory ◽  
Road Corridors

The need for transit oriented development (TOD) around railway stations has been well accepted and continues to be needed in cities looking to regenerate both transit and urban development. Large parts of suburban areas remain without quality transit down main roads that are usually filled with traffic resulting in reduced urban value. The need to regenerate both the mobility and land development along such roads will likely be the next big agenda in transport and urban policy. This paper learns from century-old experiences in public–private approaches to railway-based urban development from around the world, along with innovative insights from the novel integration of historical perspectives, entrepreneurship theory and urban planning to create the notion of a “Transit Activated Corridor” (TAC). TACs prioritize fast transit and a string of station precincts along urban main roads. The core policy processes for a TAC are outlined with some early case studies. Five design principles for delivering a TAC are presented in this paper, three principles from entrepreneurship theory and two from urban planning. The potential for new mid-tier transit like trackless trams to enable TACs is used to illustrate how these design processes can be an effective approach for designing, financing and delivering a “Transit Activated Corridor”.

Obstacles on the Path to Urban Greatness: Competing Plans for the Creation of Greater Lviv (“Wielki Lwów”)

2017 ◽  
Vol 43 (4) ◽  
pp. 661-671
Author(s):  
Nadja Weck
Keyword(s):  
Urban Planning ◽  
Urban Development ◽  
Future Development ◽  
Practical Experience ◽  
European Countries ◽  
Comprehensive Plan ◽  
The Future ◽  
Imperial Capital ◽  
New Generation ◽  
The City

Like in many other provinces, during the Habsburg period, the main point of orientation for Galicia was Vienna. This also applies to architecture and urban development. Galicia’s technical elite applied the theoretical and practical experience it gathered in Vienna to the towns and cities of this northeastern Crown land. Ignacy Drexler, born in 1878 in the Austro-Hungarian Lemberg, was a representative of a new generation of engineers and architects who did not necessarily have to spend time in the imperial capital to earn their spurs. Increasingly, besides the more or less obligatory stay in Vienna, other European countries became points of reference. Drexler did not live to see the realization of important aspects of his comprehensive plan for the city, but his ideas and the data he compiled were indispensable for the future development of his hometown. They shape urban planning in Lviv to this day.

scholarly journals Current and Future Land Use Characters of a National Central City in Eco-Fragile Region—A Case Study in Xi’an City Based on FLUS Model

Land ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 286
Author(s):  
Dingrao Feng ◽  
Wenkai Bao ◽  
Meichen Fu ◽  
Min Zhang ◽  
Yiyu Sun
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Urban Development ◽  
Urban Expansion ◽  
Land Use Patterns ◽  
Use Patterns ◽  
Pattern Change ◽  
Land Use Dynamics ◽  
The Future ◽  
Xi’An City

Land use change plays a key role in terrestrial systems and drives the process of ecological pattern change. It is important to investigate the process of land use change, predict land use patterns, and reveal the characteristics of land use dynamics. In this study, we adopted the Markov model and future land use (FLUS) model to predict the future land use conditions in Xi’an city. Furthermore, we investigated the characteristics of land use change from a novel perspective, i.e., via establishment of a complex network model. This model captured the characteristics of the land use system during different periods. The results indicated that urban expansion and cropland loss played an important role in land use pattern change. The future gravity center of urban development moved along the opposite direction to that from 2000 to 2015 in Xi’an city. Although the rate of urban expansion declined in the future, urban expansion remained the primary driver of land use change. The primary urban development directions were east-southeast (ENE), north-northeast (NNE) and west-southwest (WSW) from 1990 to 2000, 2000 to 2015, and 2015 to 2030, respectively. In fact, cropland played a vital role in land use dynamics regarding all land use types, and the stability of the land use system decreased in the future. Our study provides future land use patterns and a novel perspective to better understand land use change.

Budapest: progresso urbano a passi accelerati

STORIA URBANA ◽  
2009 ◽  
pp. 53-80
Author(s):  
Zsuzsa Ordasi
Keyword(s):  
Nineteenth Century ◽  
National Identity ◽  
Urban Planning ◽  
Urban Development ◽  
Public Works ◽  
Master Plan ◽  
Urban Architecture ◽  
European State ◽  
Leading Role ◽  
The City

- Unlike other great cities of Europe, Budapest did not experience any significant urban development before the nineteenth century, especially before 1867, the year of the foundation of the Austro-Hungarian Monarchy. After that, the city became the second pole, after Vienna, of this important European state. The capital of the Kingdom of Hungary grew through the use of various types of urban architecture and especially through a "style" that was meant to express Hungarian national identity. Architects, engineers, and other professionals from Hungary and Austria contributed to this process of modernization as well as many foreigners from Germany, France and England. The city's master plan - modeled after Paris's - focused on the area crossed by the Viale Sugár [Boulevard of the Spoke] was set on the Parisian model and so covered only certain parts of the city. The Committee on Public Works (1870-1948) played a leading role in putting the plan approved in 1972 - into effect in all aspects of urban planning, architecture and infrastructure.

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