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November 2017

Natural disasters are in 3D – and the rights that protect against them should be as well

Luis Triveno's picture
Photo credit: studiovin/Shutterstock


The recent series of devastating hurricanes in the Caribbean has reminded the world, once again, that natural disasters are not equal-opportunity destroyers. The economically marginalized and those lacking secure land and property rights are often disproportionately affected for at least three reasons:

  • First, without secure property rights, they typically lack the long-term incentive and access to credit to build safe, resilient houses
  • Second, they can be reluctant to flee their homes to safe areas, fearing they won’t be allowed to return. 
  • Finally, they are less likely to be the recipients of government risk mitigation or recovery efforts.  Government recovery efforts – no matter how well intentioned – rarely reach those most in need.  After the floods and landslides in Nepal in 2011, for example, only 6% of the poorest received government support – compared to almost 90% of the well off.  

The increasing frequency of natural disasters with tragic human consequences should also serve as reminders that resources spent on disaster risk reduction (DRR) are much more effective at saving lives and property loss. Yes, despite substantial evidence that reducing disaster risk is more cost-effective than responding to disasters, expenditures for disaster response and reconstruction exceed spending on disaster risk reduction and preparedness at a rate of about 20 to 1.

To overcome that spending gap will require innovative thinking on a time-tested idea. Governments, the World Bank, and other donors are doing the right thing when trying to devote more resources to disaster risk reduction – and to make land and property rights reforms part of a multi-faceted DRR strategy. In doing so, they would do even better by recognizing that those rights exist in three dimensions, encompassing not just the ground beneath our feet but to the space above (and below) it.

The Roadmap for Safer Schools—a conversation on making school infrastructure more resilient to natural disasters

Fernando Ramírez's picture
Global Program for Safer Schools

Imagine that you are an advisor to your country's Minister of Education. A recent earthquake damaged hundreds of schools in several cities. The minister has called for a meeting with you and asked: What are the main factors that contribute to the vulnerability of our school infrastructure? What can be done to prevent similar damages in the future?

So… What would you advise?

In search of answers, we spoke with the leaders of the World Bank’s Global Program for Safer Schools (GPSS), who have recently launched an innovative tool, the Roadmap for Safer Schools. This roadmap is a guide to design and implement systematic actions to improve the safety and resilience of school infrastructure at risk from natural hazards. 

A road by any other name: street naming and property addressing system in Accra, Ghana

Linus Pott's picture
Street names in Accra, Ghana
Street names in Accra, Ghana. Photo credit: Ben Welle/ Flickr CC
When I used to work in Rwanda, I lived on a small street in Kigali. Every time I invited friends over, I would tell them to “walk past the Embassy, look out for the Church, and then continue to the house with the black gate.” The day a street sign was erected on my street was a game changer.
 
So how do more than two million citizens of Accra navigate the busy city without the help of street names? While some street names are commonly known, most streets do not have any official name, street sign or house number. Instead, people usually refer to palm trees, speed bumps, street vendors, etc.

But, what happens when the palm tree is cut or when the street vendor changes the location?

The absence of street names poses not only challenges for orientation, but also for property tax collection, postal services, emergency services, and the private sector. Especially, new economy companies, such as Amazon or Uber, depend on street addressing systems and are eager to cater to market demands of a growing middle class.

To address these challenges, the Accra Metropolitan Assembly (AMA), financed by the World Bank’s second Land Administration Project , is implementing a street addressing and property numbering system in Accra. Other Metropolitan areas received funding from other World Bank-funded projects for similar purposes.
 

Making homes safer to build resilient cities

Kristina Wienhoefer's picture

Children are often told that home is where to run inside when thunders hit or when the rain comes, and that home is a safe place. However, for billions of people in the world, it is not.
 
By 2030, it is estimated that 3 billion people will be at risk of losing a loved one or their homes—usually their most important assets—to natural disasters. In fact, the population living on flood plains or cyclone-prone coastlines is growing twice as faster as the population in safe homes in safer areas.
 
Due to climate change, extreme weather and other natural hazard events hit these populations harder and more often. The 10 natural disasters causing the most property damages and losses in history have occurred since 2005. The damages and losses were highly concentrated in the housing sector. While the poor experience 11% of total of asset losses, they suffer 47% of all the well-being losses. Worse, natural disasters can lead to unnecessary losses of life, with earthquakes alone causing 44,585 deaths on average per year. This is an issue that policymakers and mayors need to address if they don’t want their achievements in poverty reduction to be erased by the next hurricane or earthquake.

World Bank Group

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.

Pipeline to Work: Including persons with disabilities in skills development and employment projects

Charlotte McClain-Nhlapo's picture
Photo: Dane Macri/The Advocacy Project via Flickr CC
Photo: Dane Macri/The Advocacy Project via Flickr CC.

The relationship between poverty and disability goes both ways: disability increases the risk of poverty, and the conditions of poverty increase the risk of disability.

Yet, little attention has been given to the employment readiness of persons with disabilities. This is of concern given that the employment rates of persons with disabilities are a third to half of the rates for persons without disabilities, with unemployment rates as high as 80%-90% in some countries.

[Learn more: Disability Inclusion]

Disability is a complex, evolving, and multidimensional concept. Currently, it is estimated that 15% of the world population experiences some form of disability, with prevalence rates higher in developing countries. As opportunities for sustainable income generation are directly tied to a person’s access to finance, markets, and networks, persons with disabilities usually face significant challenges in accessing these, due to:

  • non-inclusive regulations and policy,
  • lack of resource allocation,
  • stigma and societal prejudice,
  • low educational participation, and
  • inability to access their own communities and city spaces.
To continue building inclusive cities, research tells us that countries cannot achieve optimal growth by leaving behind a large group of their citizens – persons with disabilities – with economic losses from employment exclusion ranging from 3 to 7 % of the GDP. We also know that when you combine gender and disability, the challenges facing women with disabilities compound. Women with disabilities are more likely to earn less than men with disabilities and they are affected by inaccessible sanitation, smaller social and professional networks, and gender-based violence – see, for example, labor force data from the UK.

We need to do much more to ensure that women with disabilities are mainstreamed into projects that seek to empower women as entrepreneurs and change agents.

Expanding equitable opportunities for persons with disabilities is at the core of the World Bank’s work to build sustainable and inclusive communities. So, what might a disability-responsive moonshot look like for development projects addressing work for persons with disabilities? Here’s what we’re doing at the World Bank: