Beyond monocentricity: examining the spatial distribution of employment in Tehran metropolitan region, Iran

Alidadi, Mehdi; Dadashpoor, Hashem

doi:10.1080/12265934.2017.1329024

Cited by 26 publications

(12 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the EO-scenario, to protect nature and natural resources and control the lower growth rates of built-up areas, the average values of the climate variables are higher, and the population and GDP growth rates are lower than in the past. As the country's political and administrative capital, Tehran has the largest activity and employment opportunities; it is also considered the center of services in the country (Alidadi and Dadashpoor 2018). Accordingly, in the SEG-scenario, the axis of the socioeconomy has the greatest impact.…”

Section: Sd and Ca_lr Modelsmentioning

confidence: 99%

Exploring an integrated spatially model for land-use scenarios simulation in a metropolitan region

Dadashpoor

Panahi

2021

Environ Dev Sustain

Self Cite

View full text Add to dashboard Cite

Spatial simulation of land-use change scenarios in metropolitan areas is essential for analyzing both the causes and consequences of various future scenarios and is also valuable for land-use planning and management. However, current simulation models primarily focus on spatial and rarely on quantitative driving factors. This article aims to simulate future scenarios of land-use changes in the Tehran metropolitan region (TMR) by combining different models to fill this gap. Thus, in the first step, land-use changes were analyzed in the period 1985, 2000, and 2015. Then, by identifying the impact of driving factors and land-use transition potentials with Logistic regression (LR), land-use changes were allocated using the Cellular Automata (CA) method. Finally, with the validation of the model, four scenarios of the current trend(CT), socioeconomic growth(SEG), ecologicaloriented(EO), and integrated development(ID) were suggested with the combination of the System Dynamic (SD) model. The results show that the trend of land-use changes in TMR has led to the destruction of grassland, agricultural, and uncultivated lands and the continuation of this trend will increase the damage of built-up areas on valuable natural and ecological resources. In this way, proximity to roads, distance from built-up areas, and natural factors had the greatest impact on changes. Based on future scenarios in 2030, the change in the SEG-scenario shows a rapid increase in built-up areas (2858km 2) and encroachment on agricultural lands (2171km 2) . In the EO-scenario, destruction of grassland and agricultural lands and the growth of built-up areas will be limited, while CT-scenario leads to the high growth of built-up areas along with destructive impacts on natural and open spaces. In the ID-scenario, the built-up areas and grasslands will increase to 2808km 2 and 7438km 2 , respectively. Accordingly, policy-makers can use simulation of different scenarios to mitigate probable consequences of land-use changes in the metropolitan regions.

show abstract

Section: Sd and Ca_lr Modelsmentioning

confidence: 99%

Exploring an integrated spatially model for land-use scenarios simulation in a metropolitan region

Dadashpoor

Panahi

2021

Environ Dev Sustain

Self Cite

View full text Add to dashboard Cite

show abstract

“…A another limitation of the approach is the implicit assumption that cities are monocentric entities in which urban activity (and hence the need for spatial resolution) declines gradually with distance from the city center. While this assumption broadly holds for many cities such as London and other cities illustrated in this paper, many cities are polycentric [1]. The zoning system is unsuited to polycentric conurbations and the countryside, limiting its uses substantially, to urban analytics focused on monocentric cities.…”

Section: Discussionmentioning

confidence: 95%

ClockBoard: A zoning system for urban analysis

Lovelace

Tennekes

Carlino³

2022

JOSIS

View full text Add to dashboard Cite

Zones are the building blocks of urban analysis. Fields ranging from demographics to transport planning routinely use zones - spatially contiguous areal units that break-up continuous space into discrete chunks - as the foundation for diverse analysis techniques. Key methods such as origin-destination analysis and choropleth mapping rely on zones with appropriate sizes, shapes and coverage. However, existing zoning systems are sub-optimal in many urban analysis contexts, for three main reasons: 1) administrative zoning systems are often based on somewhat arbitrary factors; 2) zoning systems that are evidence-based (e.g., based on equal population size) are often highly variable in size and shape, reducing their utility for inter-city comparison; and 3) official zoning systems in many places simply do not exist or are unavailable. We set out to develop a flexible, open and scalable solution to these problems. The result is the zonebuilder project (with R, Rust and Python implementations), which was used to create the ClockBoard zoning system. ClockBoard consists of 12 segments emanating from a central place and divided by concentric rings with radii that increase in line with the triangular number sequence (1, 3, 6 km etc). 'ClockBoards' thus create a consistent visual frame of reference for monocentric cities that is reminiscent of clocks and a dartboard. This paper outlines the design and potential uses of the ClockBoard zoning system in the historical context, and discusses future avenues for research into the design and assessment of zoning systems.

show abstract

“…Perhaps the biggest limitation of the system is its implicit assumption that cities are monocentric entities in which urban activity (and hence the need for spatial resolution) declines gradually with distance from the city centre. While this assumption broadly holds for phenomena such as air pollution in London, as illustrated in Figure 6, it needs to be relaxed in many other cases [31]. The ClockBoard zoning system can thus be seen as a zoning system best suited for the analysis of monocentric cities, rather than polycentric conurbations.…”

Section: Discussionmentioning

confidence: 99%

“…A broader point is that too much academic research focusses only on a single city, without going to the effort of generalising the findings to multiple cities [6,31].…”

Section: Discussionmentioning

confidence: 99%

ClockBoard: a zoning system for urban analysis

Lovelace¹,

Tennekes²,

Carlino³

2021

Preprint

View full text Add to dashboard Cite

Zones are the building blocks of urban analysis. Fields ranging from demographics to transport planning routinely use zones — spatially contiguous areal units that break-up continuous space into discrete chunks — as the foundation for diverse analysis techniques. Key methods such as origin-destination analysis and choropleth mapping rely on zones with appropriate sizes, shapes and coverage. However, existing zoning systems are sub-optimal in many urban analysis contexts, for three main reasons: 1) available administrative zoning systems are often based on somewhat arbitrary factors; 2) evidence-based zoning systems are often highly variable in size and shape, reducing their utility for inter-city comparison; and 3) official zoning systems are non-existent, not publicly available, or are too coarse, hindering urban analysis in many places, especially in low income nations. To tackle these three key issues we developed a flexible, open and scalable solution: the ClockBoard zoning system. ClockBoard consists of 12 segments divided by concentric rings of increasing distance, creating a consistent visual frame of reference for cities that is reminiscent of a clock and a dartboard. This paper outlines the design, potential uses and merits of the ClockBoard zoning system and discusses future avenues for research and development of new zoning systems based on the experience.

show abstract

Beyond monocentricity: examining the spatial distribution of employment in Tehran metropolitan region, Iran

Cited by 26 publications

References 60 publications

Exploring an integrated spatially model for land-use scenarios simulation in a metropolitan region

Exploring an integrated spatially model for land-use scenarios simulation in a metropolitan region

ClockBoard: A zoning system for urban analysis

ClockBoard: a zoning system for urban analysis

Contact Info

Product

Resources

About