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Urban 20: Cities at the center of local solutions to global development challenges

Ede Ijjasz-Vasquez's picture
 

With the world becoming more urban than ever before, cities are at the core of the global development agenda. They play such a pivotal role in addressing global challenges and improving citizen’s lives that the battle against poverty and climate change to build inclusive, resilient, and sustainable communities will be won or lost in cities.
 
Yet, it is nations that have led the discussions around solutions for a rapidly urbanizing world, leaving the voices of cities to a secondary role. There is an urgent need to bring cities’ leadership, knowledge, and expertise to the center of global conversations on sustainable urban development.  

To highlight and share effective solutions to some of the most pressing challenges of our time, over 30 mayors from around the world will gather at the First Urban 20 Mayors Summit in Buenos Aires, Argentina, October 29-30, 2018. Together, they will provide concrete, experience-based recommendations to the leaders of the G20 countries on what it takes to achieve urban sustainability, inclusion, and prosperity.
 
As a strategic partner of the summit and the overall Urban 20 (U20) Initiative, the World Bank Group – including the World Bank and the International Finance Corporation (IFC) – is committed to helping global cities bring their expertise, needs, and voices to the center of global discussions on sustainable development. At the summit, the World Bank will present a series of knowledge notes to inform the U20 discussions and promote the exchange of ideas and innovative approaches to complex development issues, including:
  • The future of work in cities
  • Affordable housing in the world’s cities
  • Urban mobility, health and public spaces
  • Urban water resilience

In this video, World Bank Senior Director Ede Ijjasz-Vasquez (@Ede_WBG) and Lead Urban Specialist Horacio Terraza (@TerrazaH) talk about the importance of the U20 Initiative, the World Bank’s participation in the First U20 Mayors Summit, and what is next for U20 cities after the summit in Buenos Aires.

Watch the video to learn more. Watch the U20 Mayors Summit live here October 29-30, 2018. Follow @WBG_Cities and hashtag #Urban20 for updates on and from the summit.

Also available in: Español

Landslides, dumpsites, and waste pickers

Silpa Kaza's picture
Photo: alionabirukova / Shutterstock
Editorial credit: alionabirukova / Shutterstock.com

Last week, the world came to attention when the famous Hulene dumpsite in Maputo, Mozambique collapsed under heavy rains, killing at least 16 people.
 
Buried under piles of waste were homes and people from one of the most impoverished settlements in Mozambique. Many members of this community made a living collecting and selling recyclables from the dumpsite, which had served as the final disposal site for greater Maputo since the 1960s.
 
Sadly, this tragedy did not stand alone.
 
In 2017, landslides at waste dumps occurred at a shocking frequency, accounting for over 150 deaths and relocation of several hundreds in Colombo, Sri Lanka; Addis Ababa, Ethiopia; Conakry, Guinea; and Delhi, India.
 
Sixty-four million people’s lives are affected by the world’s 50 largest active dumpsites, though thousands of other risky sites also exist around the globe. Fifteen million people make a living scavenging waste and are of the population disproportionately affected when poorly or unplanned disposal sites fail to function in the midst of ever-growing refuse and inclement weather. Those most vulnerable to the landslides of dumps are those living on or by these waste disposal sites. They are the ones who often power their cities’ recycling system.

National and local leaders in Latin America: Sustainable cities are resilient cities

Sameh Wahba's picture
 

The secret sauce for making the New Urban Agenda a success

Luis Triveno's picture

Also available in: Español | 中文

Credit: Lois Goh/ World Bank


Modernity’s most common story spanning national, cultural and religious borders is about people moving from rural areas to the cities. By 2030, 80% of the world’s population will be living in urban areas, following the dream of better jobs, education, and health care.

Too often, however, that dream risks remaining an urban daydream, due to natural disasters such as hurricanes, earthquakes, and floods, as well as climate change. Those of us working to help these families find a better future must focus more on ways to support efforts to protect their lives – and their livelihoods.
 
In the 40 years since the launch of Habitat I, governments and municipalities throughout emerging and developing countries have been proving that their cities can be not only inclusive and secure, but also resilient and sustainable. However, unless they increase their speed and scale, they are unlikely to achieve the goals of the “New Urban Agenda” and its Regional Plans, launched at Habitat III in 2016.
 
From our perspective helping governments in Latin America and the Caribbean, and ahead of the World Urban Forum taking place in Kuala Lumpur, Malaysia in February, let us share three key ingredients necessary to achieve that goal:

How to manage urban expansion in mega-metropolitan areas?

Philip E. Karp's picture

As the world becomes increasingly urbanized, the number of megacities is growing rapidly.

Today there are 37 cities worldwide with populations of greater than 10 million, and 84 with populations greater than five million. More than three quarters of these cities are in developing countries. Together with their surrounding metropolitan areas, these cities produce a sizable portion of the world’s wealth and attract a large share of global talent.

These megacities face a series of common challenges associated with managing urban expansion, density, and livability—in a manner that takes advantage of the benefits of productive agglomerations, while mitigating the disadvantages of such high degrees of congestion and urban density.

Moreover, like other metropolitan areas, megacities face challenges of effectively coordinated planning, infrastructure development, and service delivery across multiple jurisdictions. Indeed, the New Urban Agenda issued at the Habitat III conference in 2016 identified metropolitan planning and management as one of the most critical needs to ensure sustainable urbanization.

What can satellite imagery tell us about secondary cities? (Part 2/2)

Sarah Elizabeth Antos's picture
In the previous blog, we discussed how remote sensing techniques could be used to map and inform policymaking in secondary cities, with a practical application in 10 Central American cities. In this post, we dive deeper into the caveats and considerations when replicating these data and methods in their cities.

Can we rely only on satellite? How accurate are these results?

It is standard practice in classification studies (particularly academic ones) to assess accuracy from behind a computer. Analysts traditionally pick a random selection of points and visually inspect the classified output with the raw imagery. However, these maps are meant to be left in the hands of local governments, and not published in academic journals.

So, it’s important to learn how well the resulting maps reflect the reality on the ground.

Having used the algorithm to classify land cover in 10 secondary cities in Central America, we were determined to learn if the buildings identified by the algorithm were in fact ‘industrial’ or ‘residential’. So the team packed their bags for San Isidro, Costa Rica and Santa Ana, El Salvador.

Upon arrival, each city was divided up into 100x100 meter blocks. Focusing primarily on the built-up environment, roughly 50 of those blocks were picked for validation. The image below shows the city of San Isidro with a 2km buffer circling around its central business district. The black boxes represent the validation sites the team visited.
 
Land Cover validation: A sample of 100m blocks that were picked to visit in San Isidro, Costa Rica. At each site, the semi-automated land cover classification map was compared to what the team observed on the ground using laptops and the Waypoint mobile app (available for Android and iOS).

What can satellite imagery tell us about secondary cities? (Part 1/2)

Sarah Elizabeth Antos's picture

The buzz around satellite imagery over the past few years has grown increasingly loud. Google Earth, drones, and microsatellites have grabbed headlines and slashed price tags. Urban planners are increasingly turning to remotely sensed data to better understand their city.

But just because we now have access to a wealth of high resolution images of a city does not mean we suddenly have insight into how that city functions.

The question remains: How can we efficiently transform big data into valuable products that help urban planners?

In an effort a few years ago to map slums, the World Bank adopted an algorithm to create land cover classification layers in large African cities using very high resolution imagery (50cm). Building on the results and lessons learned, the team saw an opportunity in applying these methods to secondary cities in Latin America & the Caribbean (LAC), where data availability challenges were deep and urbanization pressures large. Several Latin American countries including Argentina, Bolivia, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, and Panama were faced with questions about the internal structure of secondary cities and had no data on hand to answer such questions.

A limited budget and a tight timeline pushed the team to assess the possibility of using lower resolution images compared to those that had been used for large African cities. Hence, the team embarked in the project to better understand the spatial layout of secondary cities by purchasing 1.5 meter SPOT6/7 imagery and using a semi-automated classification approach to determine what types of land cover could be successfully detected.

Originally developed by Graesser et al 2012 this approach trains (open source) algorithm to leverage both the spectral and texture elements of an image to identify such things as industrial parks, tightly packed small rooftops, vegetation, bare soil etc.

What do the maps look like? The figure below shows the results of a classification in Chinandega, Nicaragua. On the left hand side is the raw imagery and the resulting land cover map (i.e. classified layer) on the right. The land highlighted by purple shows the commercial and industrial buildings, while neighborhoods composed of smaller, possibly lower quality houses are shown in red, and neighborhoods with slightly larger more organized houses have been colored yellow. Lastly, vegetation is shown as green; bare soil, beige; and roads, gray.

Want to explore our maps? Download our data here. Click here for an interactive land cover map of La Ceiba.

获奖摄影作品捕捉可持续发展城市的未来

Xueman Wang's picture
Also available in: English

可持续城市摄影作品竞赛的出发点很简单。我们想要了解世界各地的人们听到“可持续城市”这个词会“看”到什么。

   

可持续城市全球平台从全球四十多个国收到就九十多张参赛作品,内容发人深省。

摄影师通过照片试图传递的是一种需求:对能使城市恢复能力更强、更加可持续的基础设施的迫切需求,或者追求为所有人建设可持续社区的绿色理想的需求。

今天是世界城市日,是最适合与你们分享本次摄影竞赛十位入围者名单的日子, 这些入围者中包括三位获奖者和一位气候行动荣誉奖获得者。
 
人们几乎可以从Yannick Folly的获奖作品中感受到贝宁城市的混乱和汽车尾气的味道,汽车沿着狭窄的巷子艰难爬行,与摩托车和行人挤在一起。

 

Yanick Folly (贝宁) 获奖者

日复一日的发展,我们的世界一直在变化。看看充满活力的贝宁集市就能感受到这种变化。#SustainableCities

这张照片提醒人们城市是由人组成的。任何建设可持续城市的解决方案对城市居民而言必须是合理的,因为每天行走在城市街道上的人是他们每天。

 

这种渴望在其他作品中也显而易见。

 

尽管很多摄影师来自世界各地的发展中国家,然而,其中相当一部分分享的却是在我们看来的环境友好型城市:新加坡、阿姆斯特丹、伦敦、巴黎等的照片。我们看到了很多发达国家公园的照片,都在传递同一个信息: 这样的绿色空间和人行道正是我们希望城市拥有的。

 

Adedapo Adesemowo(英国/尼日利亚)

现在的奥林匹克公园曾经是石油、沥青、砷和铅的废物倾倒场所 #SustainableCities
很多作品也反映了人们梦寐以求的城市和大部分人实际生活在其中的城市的巨大差别。
 
我们收到了很多可能被许多人归类为“农村地区”的照片,但是我们应该抛开这些偏见:一些发展中国家的“城市”不过是简陋的城镇而已。
 
所以当我们看到来自尼日利亚的Oyewolo Eyitayo的这幅获奖作品时,就更有理由感到兴奋。在你看到一半是土路的路上成排的太阳能板之前,你可能觉得这只是一张典型的平淡无奇的城市郊区的照片。
 
Oyelowo Eyitayo (尼日利亚) – 获奖者
选择太阳能是简单而有效的#气候行动,可以帮助抵御气候变化。#SustainableCities

These winning photos capture the future of sustainable cities

Xueman Wang's picture
Also available in: 中文
The premise behind the Sustainable Cities photo competition was simple. We wanted to learn what people around the world “see” when they hear the words “sustainable cities.”
 
The submissions – and we at the Global Platform for Sustainable Cities received more than 90 entries from over 40 countries around the world – are very revealing.

What the photographers tried to communicate was a need: both the urgent need for infrastructure that leads to more resilient, sustainable cities, or a need to aspire to greener ideals of building sustainable communities for all.

There is no better day than today, World Cities Day, for us to share with you the 10 finalists – including 3 winners and an honorable mention for climate action – of the photo competition.

In the winning photo by Yanick Folly, one can practically feel the chaos of a city in Benin, the smell of exhaust fumes as cars crawl up alongside motorcycles and pedestrians down narrow alleyways.

Yanick Folly (Benin) – Winner
Growing day by day, our world is always moving. Just see the big vibrant Benin market. #SustainableCities

The photo is also a reminder that cities are made of people. Any set of solutions for “sustainable cities” will have to make sense to a city’s inhabitants, who tread its streets daily.
 
In other photos, the aspiration is palpable. 

Many of the photographers are nationals of developing countries from all over the world. Yet quite a few of them shared photos of cities we regard as environmentally friendly: Singapore, Amsterdam, London, and Paris... We saw many photos of parks in developed countries, and heard the same message: These green spaces and pedestrian walkways are what we want in a city.
 
Adedapo Adesemowo (UK / Nigeria)

From a waste dumping ground for oil, tar, arsenic, and lead to an Olympic park. #SustainableCities
Many photos also reflect the vast difference between the aspirational city, and what most people actually live with.
 
We received photos of what many of us may categorize as rural areas, but we should reconsider these preconceptions: some “cities” in developing countries are little more than makeshift towns.
 
So, it is all the more reason why we are excited about this winning photo by Oyewolo Eyitayo from Nigeria. You might think this is an uneventful photograph of a typical urban suburb. Except that the half dirt roads are lined with solar panels.
 
Oyelowo Eyitayo (Nigeria) – Winner
Going solar is a simple & impactful #climateaction that can help combat climate change. #SustainableCities

Urban Indigenous Peoples: the new frontier

Ede Ijjasz-Vasquez's picture
Photo by Victoria Ojea / World Bank
Photo: Victoria Ojea / World Bank

Invited to think of Buenos Aires, most would probably think of elegant cafés, beautiful architecture, passionate football fans, and buzzing streets. Invited to think harder, you might also think of its villas (slums), street children, and other less gleeful views. But no matter how hard you try, very few would associate Buenos Aires with Indigenous Peoples. Yet, Buenos Aires has the largest concentration of indigenous populations in Argentina, which is itself rarely associated with Indigenous Peoples, but has the seventh largest indigenous population in Latin America (close to one million). In effect, over 40 indigenous communities are officially registered in urban areas of the Buenos Aires Province, and as much as one quarter of all Indigenous Peoples in Argentina make a living in or around the Capital of Tango, whether in communities or not.

What do they do? What conditions they are living in? What is happening to their unique cultures and languages? Are they losing connection with their ancestral lands? Is the special legislation protecting their collective rights relevant in the cityscape? In sum, how is the city changing them and, inversely, how are they shaping the urban landscape? These and other questions were at the heart of the dialogue I had with graduate students from across the Latin America region in FLACSO – University of Buenos Aires, last week, on the occasion of the presentation of the report Indigenous Latin America in the Twenty-First Century, in Buenos Aires.

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