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South Asia

How can South Asian countries make the most of urbanization?

Ede Ijjasz-Vasquez's picture
The World Bank recently completed a comprehensive study that looks into the specifics of urban development across South Asia, and provides policy recommendations to help countries in the region build more prosperous, livable cities. One of the most innovative features of this South Asia Urbanization Review is that it relies extensively on geospatial mapping and satellite imagery, especially night-time light data. This approach allowed World Bank experts to overcome the lack of reliable, cohesive urbanization data across South Asian countries, and to measure the footprint of urban settlements in a consistent way. They quickly found out that urban expansion in South Asia remains largely unplanned, and often spreads to areas that are not officially considered urban - prompting them to describe urbanization in the region as "hidden" and "messy". In this video, Peter Ellis provides a more detailed overview of the main findings, and describes how South Asian countries have a unique opportunity to get urbanization right as their cities continue to grow.

Bright Lights, Big Cities

Mark Roberts's picture

Delhi night-time lights data imageIf you visit the National Museum of Natural History in Washington, D.C., one of the exhibits you’ll come across is a map of the Earth, which shows lights detected by satellites at night. With even a cursory look, it’s clear the lights pick out spatial patterns of urban and economic development.  Look at the USA, and you see the coasts are brightly lit, whereas the country’s interior is much less so.  Look at the Korea peninsula and you see that whilst South Korea is almost ablaze with light, the North is noteworthy for its almost complete absence of light.

The potential ability of night-time lights imagery to detect spatial patterns of urban and economic development has been known in the remote sensing community since the late 1970s.  However, it has only recently been brought to the attention of economists following a paper by Vernon Henderson, Adam Storeygard and David Weil entitled “Measuring Economic Growth from Outer Space.”  This paper alerted economists to the strong correlation between a country’s rate of GDP growth and the growth in intensity of its night-time lights, and the fact that the lights represent (for economists) a relatively untapped dataset with global coverage and a time-series dating back more than twenty years.

Shades of Green Cities

Yue Li's picture

Seoul, KoreaWhen it comes to urban development, “green” has become the buzzword. Among the public, “green” is often understood to be synonymous with reducing greenhouse gas (GHG) emissions. In policymaking, “green” has much broader implications. It can range from preventing, treating, and abating pollution, to preserving and restoring environmental quality. It may simply be providing basic urban services which improve the cleanliness of streets. Apparently, there are different shades of “green” — we could define interventions targeting global public goods as dark green and those focusing more on local public goods as light green. Among them, what is the right one for South Asian cities?

Practitioners and government officials from the region had intensive discussions on this question throughout a recent workshop on urbanization in Korea, organized by the World Bank in collaboration with the Korea Research Institute for Human Settlements.