Mapping Urban Trees Across North America with the Auto Arborist Dataset

Curated on Posted on by Stefaan Verhulst

Google Blog: “Over four billion people live in cities around the globe, and while most people interact daily with others — at the grocery store, on public transit, at work — they may take for granted their frequent interactions with the diverse plants and animals that comprise fragile urban ecosystems. Trees in cities, called urban forests, provide critical benefits for public health and wellbeing and will prove integral to urban climate adaptation. They filter air and water, capture stormwater runoff, sequester atmospheric carbon dioxide, and limit erosion and drought. Shade from urban trees reduces energy-expensive cooling costs and mitigates urban heat islands. In the US alone, urban forests cover 127M acres and produce ecosystem services valued at $18 billion. But as the climate changes these ecosystems are increasingly under threat.

Urban forest monitoring — measuring the size, health, and species distribution of trees in cities over time — allows researchers and policymakers to (1) quantify ecosystem services, including air quality improvement, carbon sequestration, and benefits to public health; (2) track damage from extreme weather events; and (3) target planting to improve robustness to climate change, disease and infestation.

However, many cities lack even basic data about the location and species of their trees. …

Today we introduce the Auto Arborist Dataset, a multiview urban tree classification dataset that, at ~2.6 million trees and >320 genera, is two orders of magnitude larger than those in prior work. To build the dataset, we pulled from public tree censuses from 23 North American cities (shown above) and merged these records with Street View and overhead RGB imagery. As the first urban forest dataset to cover multiple cities, we analyze in detail how forest models can generalize with respect to geographic distribution shifts, crucial to building systems that scale. We are releasing all 2.6M tree records publicly, along with aerial and ground-level imagery for 1M trees…(More)”

We need smarter cities, not “smart cities”

Curated on Posted on by Stefaan Verhulst

Article by Riad Meddebarchive and Calum Handforth: “This more expansive concept of what a smart city is encompasses a wide range of urban innovations. Singapore, which is exploring high-tech approaches such as drone deliveries and virtual-reality modeling, is one type of smart city. Curitiba, Brazil—a pioneer of the bus rapid transit system—is another. Harare, the capital of Zimbabwe, with its passively cooled shopping center designed in 1996, is a smart city, as are the “sponge cities” across China that use nature-based solutions to manage rainfall and floodwater.

Where technology can play a role, it must be applied thoughtfully and holistically—taking into account the needs, realities, and aspirations of city residents. Guatemala City, in collaboration with our country office team at the UN Development Programme, is using this approach to improve how city infrastructure—including parks and lighting—is managed. The city is standardizing materials and designs to reduce costs and labor,  and streamlining approval and allocation processes to increase the speed and quality of repairs and maintenance. Everything is driven by the needs of its citizens. Elsewhere in Latin America, cities are going beyond quantitative variables to take into account well-being and other nuanced outcomes. 

In her 1961 book The Death and Life of Great American Cities, Jane Jacobs, the pioneering American urbanist, discussed the importance of sidewalks. In the context of the city, they are conduits for adventure, social interaction, and unexpected encounters—what Jacobs termed the “sidewalk ballet.” Just as literal sidewalks are crucial to the urban experience, so is the larger idea of connection between elements.

Truly smart cities recognize the ambiguity of lives and livelihoods, and they are driven by outcomes beyond the implementation of “solutions.”

However, too often we see “smart cities” focus on discrete deployments of technology rather than this connective tissue. We end up with cities defined by “use cases” or “platforms.” Practically speaking, the vision of a tech-centric city is conceptually, financially, and logistically out of reach for many places. This can lead officials and innovators to dismiss the city’s real and substantial potential to reduce poverty while enhancing inclusion and sustainability.

In our work at the UN Development Programme, we focus on the interplay between different components of a truly smart city—the community, the local government, and the private sector. We also explore the different assets made available by this broader definition: high-tech innovations, yes, but also low-cost, low-tech innovations and nature-based solutions. Big data, but also the qualitative, richer detail behind the data points. The connections and “sidewalks”—not just the use cases or pilot programs. We see our work as an attempt to start redefining smart cities and increasing the size, scope, and usefulness of our urban development tool kit…(More)”.

Aligning investment and values: How an Economic Value Atlas can map regional strategies

Curated on Posted on by Stefaan Verhulst

Report by Adie Tomer and Caroline George: “Traditional built environment and economic development practices are falling short in the face of a convergent set of environmental, economic, and social challenges. With each passing year, more communities find themselves vulnerable to extreme weather events; income disparities continue to rise, leaving too many households unable to afford essential services; and employers, especially many young and minority-owned businesses, often struggle to find talented workers and access financial capital. 

Public, private, and civic leaders increasingly recognize that achieving inclusive growth and designing resilient communities require more than recruiting out-of-town businesses or attempting to reduce highway congestion. Those leaders need a new kind of policy playbook—one that addresses the cross-sectoral challenges regions face and designs strategies across disciplines.  

An Economic Value Atlas, or EVA, is part of that playbook. An EVA is a regional engagement, value-setting, and measurement process culminating in an interactive regional map that indexes neighborhood-level, value-based performance metrics. The overall framework helps practitioners delve into geographic disparities in how the region is living up to its values—opening the door to more equitable, place-based decisionmaking for business, infrastructure, and land use purposes…

The EVA framework consists of five phases of work, each of which can be adjusted based on unique local conditions: 

  • The EVA’s leadership team sets a stakeholder table with a diverse collection of regional voices to serve as the board of directors for the EVA process. 
  • The leadership team and stakeholder table develop a shared vision—a collection of specific long-term goals a region would like to achieve. 
  • A research-driven team translates values into indicators and metrics using sets of categorical indicators and quantitative metrics that reflect the goals stakeholders would like to achieve. 
  • A coding team develops and launches EVA software, which uses dynamic and flexible data to benchmark neighborhood performance relative to regional goals. 
  • The leadership team works with government and civic leaders to inform and guide policy and investment decisions using EVA outputs. 

Critically, the EVA framework is designed to deliver results…(More)”

Parallel Worlds: Revealing the Inequity of Access to Urban Spaces in Mexico City Through Mobility Data

Curated on Posted on by Stefaan Verhulst

Paper by Emmanuel Letouzé et al: “The near-ubiquitous use of mobile devices generates mobility data that can paint pictures of urban behavior at unprecedented levels of granularity and complexity. In the current period of intense sociopolitical polarization, mobility data can help reveal which urban spaces serve to attenuate or accentuate socioeconomic divides. If urban spaces served to bridge class divides, people from different socioeconomic groups would be prone to mingle in areas further removed from their homes, creating opportunities for sharing experiences in the physical world. In an opposing scenario, people would remain among neighbors and peers, creating “local urban bubbles” that reflect and reinforce social inequities and their adverse effects on social mixity, cohesion, and trust. These questions are especially salient in cities with high levels of socioeconomic inequality, such as Mexico City.

Building on a joint research project between Data-Pop Alliance and Oxfam Mexico titled “Mundos Paralelos” [Parallel Worlds], this paper leverages privacy-preserving mobility data to unveil the unequal use and appropriation of urban spaces by the inhabitants of Mexico City. This joint research harnesses a year (2018–2019) of anonymized mobility data to perform mobility and behavioral analysis of specific groups at high spatial resolution. Its main findings suggest that Mexico City is a spatially fragmented, even segregated city: although distinct socioeconomic groups do meet in certain spaces, a pattern emerges where certain points of interest are exclusive to the high- and low-income groups analyzed in this paper. The results demonstrate that spatial inequality in Mexico City is marked by unequal access to government services and cultural sites, which translates into unequal experiences of urban life and biased access to the city. The paper concludes with a series of public policy recommendations to foster a more equitable and inclusive appropriation of public space…(More)”.

Satellites zoom in on cities’ hottest neighborhoods to help combat the urban heat island effect

Curated on Posted on by Stefaan Verhulst

Article by Daniel P. Johnson: “Spend time in a city in summer and you can feel the urban heat rising from the pavement and radiating from buildings. Cities are generally hotter than surrounding rural areas, but even within cities, some residential neighborhoods get dangerously warmer than others just a few miles away.

Within these “micro-urban heat islands,” communities can experience heat wave conditions well before officials declare a heat emergency.

I use Earth-observing satellites and population data to map these hot spots, often on projects with NASA. Satellites like the Landsat program have become crucial for pinpointing urban risks so cities can prepare for and respond to extreme heat, a top weather-related killer.

Among the many things we’ve been able to track with increasingly detailed satellite data is that the hottest neighborhoods are typically low-income and often have predominantly Black or Hispanic residents….

With rising global temperatures increasing the likelihood of dangerous heat waves, cities need to know which neighborhoods are at high risk. Excessive heat can lead to dehydration, heat exhaustion, heat stroke and even death with prolonged exposure, and the most at-risk residents often lack financial resources to adapt.

Map of Chicago showing how heat deaths clustered in the urban core during the 1995 heat wave.
The July 1995 Chicago heat wave was blamed for over 739 deaths in a five-day period. Most victims were poor and elderly people who lacked air conditioning or feared opening windows because of crime. This figure shows the location of heat-related deaths clustered in areas of higher surface urban heat intensity.

Satellite instruments can identify communities vulnerable to extreme heat because they can measure and map the surface urban heat island in high detail.

For example, industrial and commercial zones are frequently among the hottest areas in cities. They typically have fewer trees to cool the air and more pavement and buildings to retain and radiate heat…(More)”

The Intersection of Data, Equity, and City Governments

Curated on Posted on by Stefaan Verhulst

Blog by Yuki Mitsuda: “The Open Data Policy Lab’s City Incubator program was established in September 2021 to help realize the Third Wave of Open Data at the subnational level by building data capacity among city intrapreneurs. In its first iteration, the program supported innovators from ten cities around the world to better use data to address the opportunities and challenges they face.

Reflecting on the six-month program, the work enabled participants to meet the needs of their cities and the people within them. They also revealed shared themes across cities — common challenges and issues that defined urban, data-driven work in the 21st century. This blog explores one of the emerging themes we saw from participants in the City Incubator program: the intersection of equity, data, and city governments…

Three of our city incubator participants designed their data innovations around the ways cities and citizens can use data to measure and improve equity. 

  • Jennifer Bodnarchuk, a Senior Data Scientist at the Innovation & Technology Department in the City of Winnipeg, for example, led the development of a Diversity Dashboard that quantified and visualized their municipal government’s workforce representation. The tool can be used to measure the level of diversity represented in city-wide employment to move towards equitable hiring in the public sector. 
  • Henry Xavier Hernandez, the Chief Information Officer at the Information Technology Department in Guayaquil, Ecuador, and his team leveraged the City Incubator to develop Citizen 360, a public market analysis platform that helps businesses, organizations, and individuals identify economic opportunities in the city. This tool can aid small business owners from all backgrounds who are navigating the journey of starting a new business.
  • Andrea Calderon led Albuquerque’s Equity Index, which helps evaluate the reach of city service distribution with the goal of increasing municipal investment in pockets of the city where equitable city service provision has not yet been achieved. Albuquerque’s Equity Index work entailed assessing air quality in the city through the framework of cumulative impacts, which measures “exposures, public health, or environmental effects from the combined emissions in a geographic area” in pursuit of environmental justice…(More)”.

From the smart city to urban justice in a digital age

Curated on Posted on by Stefaan Verhulst

Paper by Marit Rosol & Gwendolyn Blue: “The smart city is the most emblematic contemporary expression of the fusion of urbanism and digital technologies. Critical urban scholars are now increasingly likely to highlight the injustices that are created and exacerbated by emerging smart city initiatives and to diagnose the way that these projects remake urban space and urban policy in unjust ways. Despite this, there has not yet been a comprehensive and systematic analysis of the concept of justice in the smart city literature. To fill this gap and strengthen the smart city critique, we draw on the tripartite approach to justice developed by philosopher Nancy Fraser, which is focused on redistribution, recognition, and representation. We use this framework to outline key themes and identify gaps in existing critiques of the smart city, and to emphasize the importance of transformational approaches to justice that take shifts in governance seriously. In reformulating and expanding the existing critiques of the smart city, we argue for shifting the discussion away from the smart city as such. Rather than searching for an alternative smart city, we argue that critical scholars should focus on broader questions of urban justice in a digital age…(More)”.

In this small Va. town, citizens review police like Uber drivers

Curated on Posted on by Stefaan Verhulst

Article by Emily Davies: “Chris Ford stepped on the gas in his police cruiser and rolled down Gold Cup Drive to catch the SUV pushing 30 mph in a 15 mph zone. Eleven hours and 37 minutes into his shift, the corporal was ready for his first traffic stop of the day.

“Look at him being sneaky,” Fordsaid, his blue lights flashing on a quiet road in this small town where a busy day could mean animals escaped from a local slaughterhouse.

Ford parked, walked toward the SUV and greeted the man who had ignored the speed limit at exactly the wrong time.

“I was doing 15,” said the driver, a Black man in a mostly White neighborhood of a mostly White town.

The officertook his license and registration back to the cruiser.

“Every time I pull over someone of color, they’re standoffish with me. Like, ‘Here’s a White police officer, here we go again.’ ” Ford, 56, said. “So I just try to be nice.”

Ford knew the stop would be scrutinized — and not just by the reporter who was allowed to ride along on his shift.

After every significant encounter with residents, officers in Warrenton are required to hand out a QR code, which is on the back of their business card, asking for feedback on the interaction. Through a series of questions, citizens can use a star-based system to rate officers on their communication, listening skills and fairness. The responses are anonymous and can be completed any time after the interaction to encourage people to give honest assessments. The program, called Guardian Score, is supposed to give power to those stopped by police in a relationship that has historically felt one-sided — and to give police departments a tool to evaluate their force on more than arrests and tickets.

“If we started to measure how officers are treating community members, we realized we could actually infuse this into the overall evaluation process of individual officers,” said Burke Brownfeld, a founder of Guardian Score and a former police officer in Alexandria. “The definition of doing a good job could change. It would also include: How are your listening skills? How fairly are you treating people based on their perception?”…(More)”.

Toolkit on Digital Transformation for People-Oriented Cities and Communities

Curated on Posted on by Stefaan Verhulst

Toolkit by the ITU: “The Toolkit on Digital Transformation for People-Oriented Cities and Communities supports strategizing and planning the digital transformation of cities and communities to promote sustainable, inclusive, resilient and improved quality of life for residents in cities and communities.

The resources contained in this Toolkit include international standards and guidance, the latest research and projections, and cutting-edge reports on a variety of timely topics relevant to the digital transformation of cities and communities. The Toolkit can universally benefit cities and communities, as well as regions and countries regardless of their level of smart or digital development, or their geographical or economic status. ​

The Toolkit is:​

  • A one-stop guide containing latest international standards and other ITU and UN resources, publications and reports.​
  • An endeavour to identify the challenges faced by cities as well as potential solutions that they can leverage for maximum positive impact.​
  • A comprehensive, yet non-exhaustive collation of information that is meant to inspire and support progress toward the SDGs, especially SDG 11, at the local level.​..(More)”

Barcelona bets on ‘digital twin’ as future of city planning

Curated on Posted on by Stefaan Verhulst

Article by Aitor Hernández-Morales: “In five years’ time, the structure of Europe’s cities won’t be decided in local town halls but inside a quiet 19th-century chapel in a leafy neighborhood of Barcelona.

Housed in the deconsecrated Torre Girona chapel, the MareNostrum supercomputer — one of the world’s most powerful data processors — is already busily analyzing how to improve city planning in Barcelona.

Barcelona is using data to track access to primary health care centers throughout the city | BSC

“We’re using the supercomputer to make sure the urban planning process isn’t just based on clever ideas and good intentions, but on data that allows us to anticipate its impacts and avoid the negative ones,” said Barcelona Deputy Mayor Laia Bonet, who is in charge of the city’s digital transition, climate goals and international partnerships.

As part of a pilot project launched with the Italian city of Bologna earlier this year, Barcelona has created a data-based replica of itself — a digital twin — where it can trial run potential city planning projects.

“Instead of implementing flawed policies and then have to go back and correct them, we’re saving time by making sure those decisions are right before we execute them,” said Bonet.

Although the scheme is still in its test phase, Bonet said she expects the city’s high-tech approach to urban development will soon be the norm in cities across the EU.

“Within a five-year horizon I expect to see this as a basic urban planning tool,” she said.

Looking for blindspots

Barcelona’s popular superilles, or “superblocks,” are a prime example of an urban scheme that could have benefited from data modelling in the planning stages, according to Bonet.

Since 2014 the city has been creating mini-neighborhoods where through-traffic and on-street parking is all but banned, with the goal of establishing a “network of green hubs and squares where pedestrians have priority.” The superblocks were also touted as a way to help tackle air pollution, which is directly responsible for over 1,000 deaths in Barcelona each year…(More)”.