Global Cities  20 June - 27 August 2007
 
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FORM

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Eva Koch
NoMad 1998
Video extract
Running time: 11 minutes 53 seconds

This section provides an overview of the distinctly different urban forms of five cities: Istanbul, Johannesburg, London, Mumbai, and Tokyo. Satellite photographs illustrate the diversity and complexity of human impact on these cities, as physically manifest in street widths, block and plot sizes and distribution of open green spaces.

All five cities contain centrally-planned zones, but each also contains areas that have grown informally and organically. These physical structures have arisen to accommodate each city’s geographical and environmental conditions, (rivers, coastlines, mountains, orientation, etc), as well as its cultural, social and economic systems. Urban form - the DNA of the city - bears the imprint of the flows and forces that shape our daily lives.

Given the complex and locally-specific relationships between urban form and city life, architects and city planners face many challenges in trying to bring about positive change within cities of this size and history. These include the task of providing adequate infrastructure for the large number of informal settlements that have arisen in cities like Mumbai; protecting Tokyo from multiple potential natural disasters; and filling in the large areas that are London’s legacy from redundant infrastructure and industries. Many cities are being assailed by homogeneous, globalised international models which take no account of their particular, individual structures. The lasting success of planning policies and future developments may depend on the sensitivity of such interventions within the grain of their urban DNA.

ISTANBUL

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Huseyin Alptekin 1957
Born and works Turkey
Incidents 2005-7
Incident-s Bombay
Running time: 8 minutes 5 seconds
Video installation
Courtesy the artist
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click to enlarge
Huseyin Alptekin 1957
Born and works Turkey
Incidents 2005-7
Incident-s Istanbul
Running time: 10 minutes 33 seconds
Video installation
Courtesy the artist
enlarge

Istanbul is the largest city in the Balkan region. It is an ancient, but rapidly-growing city that straddles Asia and Europe along the Bosphorus strait. 95% of Istanbul is urbanised, mainly in response to overwhelming housing demand from inward migration. The formal city covers 1,839 km2, an area slightly larger than London but with 30% more people. But its informal bounds are ever-expanding as the city grapples with a combination of suburban sprawl and increased inner-city living.

In past decades pressing urban needs have often been met through informal means. This is particularly true of the housing sector, where gecekondu (‘built overnight’) squatter settlements on the city’s edges have been legitimised. In contrast, more recent residential developments take the form of gated communities.

Istanbul’s metropolitan government has recently acknowledged the need for more comprehensive planning by establishing an urban planning department. The intention is to put in place a structured process of project negotiation as well as more efficient administration of public works projects.

Co-ordinating transport is another key challenge. Over two-thirds of daily journeys in Istanbul are made on an already over-burdened public transport system; under a third are conducted by private car. Public transport infrastructure struggles under the weight of an ever-expanding population. Nevertheless, public policy has had some success in encouraging car-free travel alternatives, and improvements to the current transport system are planned, including a new tunnel beneath the Bosphorus strait linking train networks on both continents.

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Laurence Bonvin 1967
Born Switzerland, works Switzerland, Germany
Community 2005–6
On the Edges of Paradise and Istanbul Peripheral
Framed lightjet prints and plexiglass mounted lightjet prints
Courtesy the artist
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click to enlarge
Laurence Bonvin 1967
Born Switzerland, works Switzerland, Germany
Community 2005–6
On the Edges of Paradise and Istanbul Peripheral
Framed lightjet prints and plexiglass mounted lightjet prints
Courtesy the artist
enlarge

JOHANNESBURG

Johannesburg is South Africa’s largest city, with a population of about 3.2 million people at the centre of Guateng, one of Africa’s most rapidly urbanising regions. The city is relatively dispersed and has a poor public transport system. Attempts to dismantle the social and spatial legacy of apartheid are underway, but elements of an unjust geography are resurfacing. Unregulated settlement and increased crime have driven jobs and people out to the suburbs, creating a hole at the city’s heart around Hillbrow, now inhabited principally by immigrants from other African states.

The financial and corporate centre has moved from the modernist downtown core to the shapeless suburbs of Sandton and Rosebank. Within this area’s shopping centres, walled hotels, and businesses and residential complexes warded by security gates, cameras and guards, a range of social groups gather to conduct business and socialise.

Only three kilometres away, the former apartheid ghettoes of Alexandra and Soweto house hundreds of thousands in substandard conditions. Informal settlements with high levels of social disadvantage are growing along the city fringes, as new residents struggle to obtain other forms of shelter and face arduous journeys to work on informal public transport systems. But Soweto now has tarmacked streets and basic services, including schools and shopping malls. And since 1994, the new South African government has planned almost two million lowcost homes under the Reconstruction and Development Programme.

LONDON

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Francis Alÿs 1959
Born Belgium, works Mexico, Britain
Railings 2004
From left to right
Sample I, Onslow Gardens, Park Crescent, Fitzroy Square
Video installation
Total running time: 10 minutes 44 seconds
Presented by Tate Patrons 2006
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London’s organic urban form covers an area of 1,572 square kilometres – double the size of New York City, but with a similar population of 7.5 million inhabitants. Its irregularity reflects many aspects of its history: these include Britain’s island status, which meant London needed no defensive barriers; the presence of many urban villages; the destruction caused by Second World War bombings and, more recently, the fragmented nature of its local government.

Compared to any other global mega-city, a very large amount of London’s surface is given over to domestic gardens, parks and open areas, making it a relatively low density city. London’s central and western zones are denser and more continuous while its eastern fringes are more fragmented and open as the river Thames approaches the North Sea. As the mercantile hub of the historic British Empire, London’s port stretched eastwards along the Thames to the open sea, remaining active until the 1970s. This means much of the city’s available land, derelict for decades, is concentrated in East London, host to some of the city’s most disadvantaged communities and now the site for new transport and housing projects, including the London 2012 Olympics.

Also ripe for development are London’s existing transport interchanges – King’s Cross, Paddington Station, Stratford – and redundant industrial sites – Battersea Power Station, White City, Greenwich Peninsula and the Lower Lea Valley. These are being developed by the private sector in response to demand for new housing and commercial facilities. Since 2000, after 15 years without metropolitan governance, London has had an elected Mayor and assembly to discuss citywide issues and to set metropolitan policy. The Greater London Authority improves coordination between the city’s 33 boroughs, focusing on economic growth, housing, social inclusion and upgrading urban and natural environments.

MUMBAI

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Eva Koch
NoMad 1998
Video installation
Running time: 11 minutes 53 seconds
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Mumbai (Bombay) is India’s most populous city; over 18 million people live and work in its wider metropolitan region, tightly-packed on a thin stretch of land between the Arabian Sea and the Gulf of Mumbai. Built on seven small islands progressively linked by land reclaimed from the sea, Mumbai’s growth has, until recently, been constrained by its physical geography. The city has grown along corridors created by an extensive suburban railway, though residential development often consists of slum settlements crowding dangerously close to the tracks.

The population increased tenfold last century, but sustained immigration and a high birth rate is set to produce a 20% growth in the next decade. More than half the city’s population lives in slums (a figure roughly equivalent to the population of London). Rapid urbanisation has produced poverty, poor health and employment instability. Lack of investment in transport, sanitation and housing means that Mumbai is fast approaching breaking point. Solutions to such major urban issues are needed urgently. However, Mumbai is currently controlled by the state of Maharashtra and Indian central government, and as such suffers from a decision-making system that lacks the knowledge and power to implement changes sensitive to local needs.

TOKYO

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Atelier Bow Wow:
Yoshiharu Tsukamoto 1965
Momoyo Kaijima 1969
Born and work Japan
World Cup Flux 2002–6
Video
Running time: 3 minutes 31 seconds
Courtesy Victoria Miro Gallery
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Tokyo’s population grew dramatically in the twentieth century. The largest urban region in the world has evolved as a series of continuous medium-density suburbs, connected to employment and commercial centres by a very efficient system of underground and railway lines.Nearly four out of five daily journeys in Tokyo are made on the city’s comprehensive public transport network. To accommodate this growth, Tokyo Bay has been progressively infilled to create land for more offices and housing.

The city’s population is spread relatively evenly; it does not have a significant high-density residential inner core. Less than 5% of Tokyo’s total surface is green space. Policies to curb the city’s growth mean that the city is not expected to gain a significant number of residents in the future; its challenge is to produce a more sustainable and pleasant environment for its millions of current residents.

Tokyo’s development has been driven by its disaster-prone environmental landscape. Japan experiences around 27 typhoons per year; Tokyo is prone to earthquakes and floods, a problem exacerbated by the fact that half of central Tokyo is built on low-lying landfill sites. This means the city has always considered its extensive waterfront from the point of view of disaster-prevention, rather than as a recreational asset. This strategy is being reversed as Tokyo addresses its next stage of urban development.