Cooler Communities for All

Heat map of Omaha, Nebraska / Salvador Lindquist and Keenan Gibbons

“2023 was the hottest year on record,” said Daniella Hirschfeld, ASLA, PhD, assistant professor at Utah State University. “But we must also think of a future when 2023 was one of the coolest years this century.”

In the next few decades, we can expect 250,000 excess deaths from extreme heat worldwide each year. People in underserved communities, children, and older adults are at greater risk.

There will also be significant economic impacts. “Already, an estimated 153 billion labor hours have been lost due to extreme heat.”

In an online discussion organized by the ASLA Biodiversity and Climate Action Committee, Hirschfeld said there is one approach that can help cool entire communities. “Nature-based solutions reduce urban heat islands.”

Landscape architects are weaving these solutions into the built environment, increasing our resilience to rising temperatures. They are also developing plans and designs to ensure underserved and historically marginalized communities see benefits in an equitable way.

Earlier this year, Hirschfeld published Landscape Architecture Solutions to Extreme Heat, a study supported by a grant from the ASLA Fund. Her research found that “increasing the number, size, and amount of greenery in a nature-based solution decreases urban heat islands.”

“How these solutions are distributed through a community also matters,” she said. If they are all clustered in one community, then other communities will not benefit. A greater cooling effect is achieved when these solutions are connected.

Her research identified four key design strategies to reduce urban temperatures:

  • Increase tree percentage in parks and green spaces
  • Provide shade
  • Use plant materials and water instead of hardscape
  • Switch to green ground cover, including grasses and shrubs

Instead of focusing on individual heat islands, Salvador Lindquist, ASLA, assistant professor at the University of Nebraska – Lincoln, sees them as connected in heat archipelagos or island chains.

In Omaha, Nebraska, these archipelagos form in underserved communities that were once redlined. “These communities are 13 degrees hotter on average.”

Lindquist and his research collaborator Keenan Gibbons, SWA, at SmithGroup, are using technology to understand how dangerous urban heat forms. His goal is to better measure and visualize heat impacts in neighborhoods and catalyze investment in nature-based solutions.

In three communities in Omaha, Lindquist looked at heat and demographic data. He found that “hotter communities also have lower physical and mental health and increased poverty and unemployment.”

He then deployed drones with thermal sensors to develop a 3D view of heat hazards. And he confirmed drone data with readings taken on the ground with hand-held sensors.

Drone heat data / Salvador Lindquist and Keenan Gibbons

The data and modeling told him that urban environments can be 10-30 degrees warmer than surrounding areas because of concrete and asphalt.

On a moderately warm day, in the mid-80s, he found that a black-colored roof can hit temperatures of 150 degrees, while a white roof can be 30 degrees cooler. A street can reach 113 degrees, but shaded areas can be 23 degrees cooler. “Color and shade make a big difference.”

With support from the Landscape Architecture Foundation and Council of Educators in Landscape Architecture, he and Gibbons will soon release a toolkit on technologies and techniques for measuring heat.

3D view of heat impacts in Omaha, Nebraska / Salvador Lindquist and Keenan Gibbons

In New Orleans, Wes Michaels, ASLA, principal at Spackman Mossop Michaels (SMM), also found that heat impacts are not evenly distributed throughout the city. “Some neighborhoods are 20 degrees warmer. And there is no surprise here — social and economic vulnerability and heat overlap.”

Surface temperatures in New Orleans / Spackman Mossop Michaels

The cause of the heat differences is largely due to the inequitable distribution of trees.

SMM partnered with the local non-profit organization Sustaining Our Urban Landscape (SOUL) to create a highly accessible, equity-focused reforestation plan for the city that provides a roadmap for achieving a tree canopy of 24 percent by 2040.

But more importantly, the plan also seeks to equalize the canopy, so at least 10 percent of all 72 neighborhoods are covered in trees. Currently, more than half of neighborhoods are under the 10 percent goal.

Tree canopy by neighborhood / Spackman Mossop Michaels

Michaels said 100,000 trees will need to be planted at a pace of 7,000 trees each year for the next 15 years. “This is infrastructure that needs to be built.”

SOUL tree planting / Spackman Mossop Michaels

A set of pilot neighborhoods are moving the plan forward. Over five years, these communities will grow trees, increase capacity to plant trees, and train local professionals.

In these neighborhoods, engagement is helping to ensure community members understand the goals of the plan and support where trees are planted. “Trees can’t become controversial. If a limb falls off a tree onto someone’s house, that sets back the plan.”

When planting trees in underserved communities, Michaels urged landscape architects to “stop, think, and listen.” He has learned the hard way that “not everyone sees trees the way I do.” It’s important to “go slow and meet people where they are.”

The reforestation plan also calls for the city to create a unified tree policy. “This is an ongoing project to create cohesion between city agencies,” Michaels said. And it also seeks to prevent net tree loss from development or storms.

Landscape Architects Take on Embodied Carbon

Concrete has high amounts of embodied carbon. These concrete slabs will be reused in Sasaki’s Ellinikon Metropolitan Park in Athens, Greece / Sasaki

“Landscape architects have started conversations about embodied carbon. There is a realization that we can no longer ignore the grey parts,” said Stephanie Carlisle, Senior Researcher, Carbon Leadership Forum and the University of Washington, during the first in a series of webinars organized by the ASLA Biodiversity and Climate Action Committee.

The grey parts are concrete, steel, and other manufactured products in projects. And the conversations happening are laying the foundation for a shift away from using these materials. The landscape architect climate leaders driving these conversations are offering practical ways to decarbonize projects and specify low-carbon materials.

“The built environment now accounts for 40 percent of global greenhouse gas emissions,” Carlisle said. And with population growth, the “global building stock is expected to double over the next 40 years. That means a new New York City every month.” That also means “embodied carbon is expected to account for more than half of construction emissions from now to 2050.”

For landscapes, approximately 75 percent of emissions come from embodied carbon. These are generated by the extraction, manufacturing, transportation, and installation of landscape materials. The other 25 percent come from operations — lighting, water systems, and maintenance.

“Landscape projects are infrastructure. They are highly engineered. They share the same materials with buildings, roads, and bridges,” Carlisle said. “Parks and other landscapes can also be hardscapes that use concrete and steel.”

The ASLA Climate Action Plan calls for eliminating embodied carbon emissions from projects by 2040. The way landscape architects can do this is by tracking the global warming potential (GWP) of the materials they specify.

The lifecycle assessment (LCA) is the global standard for measuring the GWP of a project. It covers energy and emissions from the manufacturing of materials, the construction process, use of the materials, and their end of life reuse, recycling, or disposal.

In the past, LCAs have typically focused on buildings, but Carlisle and landscape architects are leading a shift to whole project LCAs, which also include the energy and water use and emissions from landscapes and infrastructure that surround buildings.

There are a range of tools for measuring project impacts, including professional LCA tools, carbon calculators, design-integrated whole building LCA tools, and product databases.

Another way to measure GWP is through environmental product declarations (EPDs). These need to be developed by product manufacturers. EPDs identify the carbon emissions from products and are complementary to whole site LCAs. “Designers can use both models.”

Carlisle said LCAs should “not be for special projects” alone but also be part of the core design services of landscape architects. “This is the path to zero emissions.”

She also urged landscape architects to:

  • “Build less and reuse more
  • Design lighter and smarter
  • Use low-carbon alternatives
  • Procure lower-carbon products
  • Minimize site disturbances
  • And increase carbon sequestration.”

But she noted landscape architects should be realistic about how long it takes to store carbon in soils and plants.

In all these efforts, “landscape architects are behind the game,” argued Chris Hardy, ASLA, PLA, Senior Associate at Sasaki, founder of Carbon Conscience, and a landscape architect leading the decarbonization of the profession. “Architects are about 10 years ahead of us.”

While the whole building LCA process has been codified for more than five years, the whole project LCA approach has only recently been developed through Climate Positive Design‘s Pathfinder tool.

Hardy recommended landscape architects focus on the embodied carbon from products and their replacements; the construction process; and the circular economy, including how products are reused or recycled at the end of their use in landscapes.

Landscape architects also have the unique ability to store carbon in landscapes through soils, plants, and trees. This presents a great opportunity.

But he noted that carbon storage capacity varies widely by ecosystem type. “Wetlands, salt marshes, and mangroves have high carbon storage capacity, followed by forests and prairies.”

Carbon storage capacity of ecosystems / Sasaki

At Sasaki, he developed the Carbon Conscience tool to “change the conversation during the concept and planning stages” of a project, when the opportunity to reduce emissions is greatest.

Carbon Conscience / Sasaki

The tool enables landscape architects to see the carbon impacts of different site scenarios. There are 260 landscape and 250 building uses available.

Carbon Conscience / Sasaki

Soon, landscape architects will be able to transfer their concept designs from Carbon Conscience into Climate Positive Design’s Pathfinder, where more detailed carbon calculations can be made, rooted in specific material choices.

“We are on a mission to decarbonize,” said Pamela Conrad, ASLA, PLA, founder of Climate Positive Design, who has been the leading the decarbonization of landscape architecture for five years.

“Seven years ago, when I was working on the Treasure Island project off the coast of San Francisco, I realized landscape architects were having conversations about climate impacts like sea level rise, but not the carbon footprint of our projects.”

When Conrad starting running the numbers, she discovered a landscape she designed would take 200 years to offset. But with a few tweaks that maintained the integrity of the design, that could be brought down to 20 years.

“It was a moment of awakening. I realized we need to change business as usual.”

Conrad chaired the task force that created the ASLA Climate Action Plan in 2022. In it, she outlined science-based targets landscape architects need to hit.

“To keep the 1.5°C (2.7°F) global warming limit within reach, we need to cut our project emissions by half by 2030. And then we need to reach zero emissions and double our current rates of carbon sequestration by 2040.”

Conrad has been tracking the carbon performance of landscape architecture projects. More than 10,000 projects have been submitted to Pathfinder to date, and together they will result in 1.9 million trees planted, which is equal to taking 400,000 cars off the road.

But much more needs to be done. Landscape architects need to further adapt how they design to take the GWP of projects into account. Conrad encouraged them to apply practical strategies:

  • “Incorporate walking and biking infrastructure
  • Use reclaimed, reused materials
  • Substitute cement with other materials with lower embodied carbon
  • Reduce site disturbances that impact carbon stored in soils
  • Restore ecosystems
  • Increase plantings
  • Be creative with greening”

“And just going local for products can cut emissions from transportation by 15-20 percent.”

As Pathfinder and Carbon Conscience further develop, landscape architects will also need to collaborate more with architects and engineers on decarbonization. With their ability to store carbon in landscapes, they can play an even greater role in reducing the climate impacts of the built environment.

Next Generation of Landscape Architecture Leaders Focus on Climate, Equity, and Technology (Part II)

Image created in Photoshop using generative AI / Phillip Fernberg

“Our fellows have shown courage, written books, founded mission-driven non-profits, created new coalitions, and disseminated new tools,” said Cindy Sanders, FASLA, CEO of OLIN, in her introduction of the Landscape Architecture Foundation (LAF) Fellowship for Innovation and Leadership program at Arena Stage in Washington, D.C.

Sanders highlighted the results of a five-year assessment of the LAF fellowship program and its efforts to grow the next generation of diverse landscape architecture leaders. The assessment shows that past fellows are shaping the future of the built environment in key public, non-profit, and private sector roles.

And she introduced the latest class of six fellows, who focused on climate, equity, technology, and storytelling:

Artificial intelligence (AI) will bolster, break, and transform the process of landscape architecture,” said Phillip Fernberg, a designer and PhD student at Utah State University. Many kinds of artificial intelligence have been developed over past decades. But what has recently caught our collective attention is ChatGPT, an “artificial general intelligence.” He said ChatGPT “isn’t as magical as you may think” — it’s machine learning from patterns of data. But it shows the range of transformative and disruptive technologies to come.

AI will bolster landscape architects’ work by making it far easier to find images of different species of trees and plants. It will also help landscape architects and community groups better analyze landscapes, particularly at the large scale, and advance efforts on climate change, biodiversity, and equity.

But it will also break landscape architects’ conception of their role and value as designers. AI tools have already demonstrated they can create renderings that look nearly human made. This raises questions for landscape architects, like: “What is it that I really do?”

Renderings created by Midjourney AI / Jeff Cutler

Fernberg thinks renderings won’t become fully AI-driven, but designers’ jobs will be rethought to better integrate with AI. He said a host of privacy, ethical, and intellectual property issues will also need to be addressed.

Ultimately, AI will transform how landscape architects work, changing the data, models, and processes used by designers. He called for landscape architects and ASLA to catch up to where architects and planners are. These professions have formed networks and working groups and developed research to explore the implications of AI. “Landscape architects need to imbue their value system in these tools.”

For Daniel Winterbottom, FASLA, professor of landscape architecture at the University of Washington, access to gardens and nature in prisons helps inmates heal from abuse, trauma, and addiction and prepare for a healthier life after their incarceration.

Worldwide, there are currently 10.3 million people imprisoned. Approximately 25 percent of those people — 2.2 million — are incarcerated in the U.S. In America, prison is “oppressively bleak” and “designed to be demoralizing.” Prison practices are also rooted in a history of racism and social injustices. These environments are typically “austere and efficient.” Most often, there is very little access to nature.

In contrast, many European countries have “open prisons” that provide inmates access to wild nature. Inmates have responsibilities tending gardens and earn trust that prepares them to be responsible citizens post-incarceration.

Halden Prison Garden, Halden, Norway / Daniel Winterbottom, FASLA

Through a series of powerful recorded interviews, Winterbottom found that inmates involved in garden programs experienced a range of benefits. They experienced reduced stress and conflict. They harmed themselves and others less and cared for themselves and others more. “Working on the garden helped them work on themselves. Outer gardening led to inner gardening — weeding and pruning their defects and shortcomings,” one interviewee said. Correctional officers, which also suffer from high rates of PTSD and suicide, saw benefits.

Garden at San Quentin State Prison, San Quentin, California / Insight Garden Program

Winterbottom sees the need for a national policy to enable restorative prison gardens, but acknowledged it will require long-term advocacy to achieve. He pointed to “pockets of change” in California, Maryland, Pennsylvania, and Washington. He urged landscape architects to partner with prisons to develop gardens, volunteer or teach in prisons, mentor formerly incarcerated people, and advocate for reform.

“Landscape architects deal with massive social and environmental problems but we are nearly absent in popular culture. We need new vehicles to bring people in,” said Joseph James, ASLA, founder of Eponymous Practice. One promising vehicle is graphic novels, which are “the fastest growing section of the library.” These visual books are increasingly popular because they are “really approachable and accessible for struggling readers.”

Building on his love of comics, James spent his fellowship drawing and writing his own graphic novel focused on the power of place. He said places become meaningful for people when they are tied to memories and emotions. And he wanted to convey how landscape architects purposefully design places for people to connect to.

His graphic novel features teenagers who had transformed a park into a magical world, a place of adventure, with ruins and a wizard. They learn their beloved landscape is being threatened by a renovation, but then with the help of a neighborhood landscape architect become involved in the redesign process. They learn how landscape architects plan and design communities.

Landscape Architecture Graphic Novel / Joseph James
Landscape Architecture Graphic Novel / Joseph James

James is also developing a companion teacher’s guide for the graphic novel, with recommendations on how to use the book to teach earth and life sciences and design thinking. He argues that “place-based storytelling” is one of the best ways to reach young people and introduce them to landscape architecture.

And he called on landscape architects to develop strong relationships with K-12 schools and use hands-on drawing exercises in classes. His graphic novel is rooted in his work with teachers and students in Boston at the Boston Green Academy and explorations of Franklin Park.

The tree wizard of Franklin Park. Boston, Massachusetts / Joseph James

Read Part I

Dept. of Homeland Security Designates Landscape Architecture a STEM Discipline

ASLA 2020 Professional Research Honor Award. Seeding Specificity: Materials and Methods for Novel Ecosystems. Baltimore, Maryland. Mahan Rykiel Associates. Client: Maryland Department of Transportation and Maryland Port Administration

The designation recognizes the high degree of science, technology, engineering and mathematics course work required in landscape architecture collegiate programs

By Lisa Hardaway

The U.S. Department of Homeland Security has designated landscape architecture a STEM (science, technology, engineering, mathematics) degree program. The American Society of Landscape Architects (ASLA) advocated for the designation.

“Landscape architecture applies science, technology, cutting edge research, and engineering principles, to design healthy communities, active transportation projects, campuses and parks. We help communities adapt to climate driven extreme weather and support biodiversity,” said Torey Carter-Conneen, CEO of ASLA. “The infrastructure challenges in municipalities across the country are enormous —landscape architects bring transformative solutions. Today’s decision will advance landscape architecture education and practice, and that is great for America and the global community.”

Landscape architecture programs are pioneering some of the most innovative research and developing new technologies – from using artificial intelligence for urban agriculture, to urban planning for autonomous vehicles; to hydraulic modeling, robotic fabrication, and augmented reality for water bodies, and more.

“The STEM designation finally reflects the reality of the discipline of landscape architecture. Our work is fully dependent on science and technology, from understanding soils at the level of microbial interactions and nutrient exchanges, which keep our urban canopy alive, to coastal adaptations informed by continuously evolving climate data,” said Gary Hilderbrand, FASLA, the Peter Louis Hornbeck Professor in Practice and Chair of the Department of Landscape Architecture at Harvard Graduate School of Design. “This new designation brings with it greater opportunities for students and graduates throughout the United States and beyond to become leaders in the field.”

“Landscape architects have incredible responsibility for the health, safety and well-being of communities which is why it’s imperative for landscape architects to continue to be licensed to practice,” said Emily O’Mahoney, FASLA, President of ASLA. “The STEM designation will be an additional tool in helping decision-makers understand the rigor this discipline demands.”

View the application materials ASLA submitted

ASLA Announces 2022 Professional Awards

ASLA 2022 Professional General Design Award of Excellence. Palm Springs Downtown Park, Palm Springs, California. RIOS / Millicent Harvey

Twenty-eight Professional Award winners represent the highest level of achievement in the landscape architecture profession

By Lisa Hardaway

ASLA has announced its 2022 Professional Awards. Twenty-eight Professional Award winners represent the highest level of achievement in the landscape architecture profession. All winners and their locations are listed below.

Jury panels representing a broad cross-section of the profession, from the public and private sectors, and academia, select winners each year. The 28 winners were chosen out of 506 entries.

The Professional Awards jury also selects a Landmark Award each year; this year’s Landmark Award celebrates “Crissy Field: An Enduring Transformation” by Hargreaves Jones for the Golden Gate National Parks Conservancy. Crissy Field, in San Francisco’s famed Presidio, features restored coastal habitat, recreational amenities and historical interpretation.

ASLA 2022 Landmark Award. Crissy Field: An Enduring Transformation. San Francisco, California. Hargreaves Jones / Hargreaves Jones

“ASLA Professional Awards for decades have recognized the most significant achievements by landscape architects nationwide, and we congratulate this year’s winners for their extraordinary contributions to their communities and the profession,” said ASLA President Eugenia Martin, FASLA. “Many of this year’s winning projects were focused on reconnecting communities to landscapes, illustrating the important role landscape architects play in creating places for communities to live, work, and play.”

ASLA 2022 Professional Residential Design Award of Excellence. Edwin M. Lee Apartments. San Francisco, CA. GLS Landscape | Architecture / Patrik Argast

“These award winners underscore how landscape architects are problem- solving some of the biggest challenges facing communities around the globe,” said ASLA CEO Torey Carter-Conneen. “From equitable community gathering spaces to addressing climate change, these winners represent the cutting edge of our industry.”

ASLA 2022 Professional Urban Design Honor Award. Denny Regrade Campus. Seattle, Washington. Site Workshop / Stuart Issett

Beginning this year, award winners will be archived in the Library of Congress. In addition, Award recipients and their clients, will be honored in person at the awards presentation ceremony during the ASLA 2022 Conference on Landscape Architecture in San Francisco, California, November 11-14.

AWARD CATEGORIES

General Design

Award of Excellence
Palm Springs Downtown Park
Palm Springs, California
RIOS

Honor Award
From Brownfield to Green Anchor in the Assembly Square District
Somerville, Massachusetts
OJB

Honor Award
West Pond: Living Shoreline
Brooklyn & Queens, New York
Dirtworks Landscape Architecture P.C.

Honor Award
Riverfront Spokane
Spokane, Washington
Berger Partnership

Honor Award
10,000 SUNS: Highway to Park Project
Providence, Rhode Island
DESIGN UNDER SKY

Honor Award
Domino Park
Brooklyn, New York
James Corner Field Operations

Honor Award
A Community’s Embrace Responding to Tragedy, The January 8th Memorial and the El Presidio Park Vision Plan
Tucson, Arizona
Chee Salette, Tina Chee Landscape Studio

Urban Design

Award of Excellence
HOPE SF: Rebuild Potrero
San Francisco, California
GLS Landscape | Architecture

Honor Award
Midtown Park
Houston, Texas
Design Workshop, Inc

Honor Award
Shirley Chisholm State Park
New York, New York
Michael Van Valkenburgh Associates

Honor Award
Denny Regrade Campus
Seattle, WA
Site Workshop

Residential Design

Award of Excellence
Edwin M. Lee Apartments
San Francisco, California
GLS Landscape | Architecture

Honor Award
Coast Ridge Residence
Portola Valley, California
Scott Lewis Landscape Architecture

Honor Award
Quarry House
Park City, Utah
Design Workshop, Inc

Honor Award
Crest Apartments, A Restorative Parallel for Supportive Housing
Van Nuys, California
SWA Group

Honor Award
Refugio
Santa Cruz, California
Ground Studio

Analysis & Planning

Honor Award
Connecting People and Landscape: Integrating Cultural Landscapes, Climate Resiliency, and Growth Management in the Low Country
Beaufort County, South Carolina
Design Workshop, Inc

Honor Award
Moakley Park Resilience Plan
Boston, Massachusetts
Stoss Landscape Urbanism

Honor Award
Preparing the Ground: Restorative Justice on Portland’s Interstate 5
Portland, Oregon
ZGF Architects

Honor Award
Reimagine Nature and Inclusion for Salt Lake City
Salt Lake City, Utah
Design Workshop, Inc

Honor
Accelerating Rural Recovery and Resilience: The Pollocksville Community Floodprint
Pollocksville, North Carolina
NC State University Coastal Dynamics Design Lab

Communications

Honor Award
Talk Tree to Me: Facilitating a Complex Conversation Around Trees in Detroit
Detroit, Michigan
Spackman Massop Michaels

Honor Award
Miridae Mobile Nursery: Growing a Native Plant Community
Sacramento Region, California
Miridae

Honor Award
Open Space Master Plan, New York City Housing Authority (NYCHA)
New York City, New York
Grain Collective Landscape Architecture & Urban Design PLLC

Research

Honor Award
Curbing Sediment: A Proof of Concept
The Ohio State University
Halina Steiner & Ryan Winston

Honor Award
Soilless Soils: Investigation of Recycled Color-Mixed Glass in Engineered Soils
Philadelphia, Pennsylvania
OLIN

Honor Award
Alabama Meadows
Auburn, Alabama
Emily Knox, ASLA; and David Hill, ASLA

Things You Should Know About Artificial Intelligence and Design

Big Data. Big Design. Why Designers Should Care about Artificial Intelligence / Princeton Architectural Press

By Phillip Fernberg, ASLA

Should designers care about artificial intelligence (AI) or machine learning (ML)? There is no question the technology is adding texture to the current zeitgeist. Never could I have imagined seeing a blockbuster hit where Ryan Reynolds emerges as a conscious non-player character in a video game and a flop where Melissa McCarthy negotiates humanity’s future with a James Corden-powered superintelligence within a year of each other. But does learning AI and ML’s ins and outs really matter for the creative professions and our nebulous, invaluable way of operating?

Helen Armstrong, a professor of graphic design at NC State, thinks so. In fact, for her it is imperative. “[AI] is everywhere and has already transformed our profession,” the preface to her new book reads. “To be honest, it’s going to steamroll right over us unless we jump aboard and start pulling the levers and steering the train in a human, ethical, and intentional direction.” The book is Big Data. Big Design. Why Designers Should Care about Artificial Intelligence and its gospel is a primer for designers of all cuts — landscape, graphic, industrial, or otherwise — to get oriented to a brave new world of human-machine relations.

Installation view of A Becoming Resemblance, featuring Probably Chelsea (2017) by Heather Dewey-Hagborg and Chelsea E. Manning, August 2– September 5, 2017 / Photo by Paula Abreu Pita; courtesy of the artists and Fridman Gallery, New York, and PAP

When I say gospel, I do not mean it ironically. Armstrong’s prose is tinged with the passion of an evangelist trying to open our eyes to the great and terrible possibilities of AI-driven design practice. A book of this nature is sorely needed. As Brent Chamberlain and I argued last year in a Landscape Architecture Magazine article, the built environment professions are in the midst of an unprecedented technological transformation that is so overwhelmingly expansive yet so subtle it can be easy to ignore — even if for the mere sake of mental and emotional preservation.

We landscape architects need some particular stirring in this regard. The complexity and timescale of our working medium combined with a mostly healthy skepticism towards new technology for new technology’s sake can sometimes make it seem like the profession is perpetually playing catch-up. Big Data. Big Design. offers the catch-up without condescension, taking the generalist view that every design discipline needs to understand machine learning better regardless of pre-existing technical prowess.

The book’s structure is straightforward, with four main sections sandwiched by a preface and conclusion. The scale of discussion in these sections oscillates between broad definitions of what exactly AI and ML are (Armstrong uses the terms AI and ML interchangeably) and more specific examples of how they are used in design practice.

The parishioner’s tone of the first three chapters then turns more technical in the fourth as the author delves more into the weeds of ML, specifically the differences between its three main approaches: supervised learning, unsupervised learning, and reinforcement learning. If I were to use a crude analogy to sum up the book’s conceptual sequence, I would say it follows Simon Sinek’s golden circle model: it starts with why designers should care about ML, elaborates how designers might use it, and culminates in what such a process might mean for society.

Sougwen Chung, Drawing Operations Duet (Performance), 2017 Pier 9, Autodesk / Courtesy of Sougwen Chung, Scilicet LLC
Sougwen Chung, Drawing Operations Duet (Performance), 2017 Pier 9, Autodesk / Courtesy of Sougwen Chung, Scilicet LLC

Nearly anyone who lives in the modern world produces data, often on the order of terabytes per day. We text our friends, stream videos, use fitness apps, ask Siri about the weather while we look out the window, walk by CCTV cameras, the list goes on. Most of these data are unstructured, i.e. not organized in any clear order. Machine learning provides a way for computers to glean meaning from this lack of structure.

As Armstrong puts it, “even now as you read, computers sift and categorize your data trails—both unstructured and structured — plunging deeper into who you are and what makes you tick.” How does it do this? The short answer is algorithms, statistical analysis, and prediction. Not sure what any of those words mean? Fear not! The book is riddled with basic definitions in the margins, inset snappy diagrams, and clear infographics that will bring even the most tech-averse designer up to snuff. For some, these visual aids may seem trite, but to me they were integral.

As a researcher dedicated to demystifying emerging technology for landscape architects, I believe it is vital we get designers of all demographics and digital abilities to a shared understanding of what AI is so we can all better facilitate its continued permeation into practice. Big Data. Big Design. does this is in spades.

The book’s real strength lies in the compilation of concrete examples from ML-assisted design practice. Armstrong assembles a fantastically broad collection of work exploring this new era of human-machine design that gives support to her claim that “our interactions with machines are shifting from ‘transactional’ to ‘relational’,” and that with that transition comes a fundamentally new way of seeing design.

The reader is introduced to a vibrant, emerging ecology of human-machine design partnerships, envisaging at once all the good that can be accomplished for humanity when those partnerships are well thought out and all the ill that can come when they are not. There are in-depth interviews with human-computer interaction experts like John Zimmerman and descriptions of visionary creative work like that of Tellart and Toyota’s emotionally intelligent concept cars.

Emotionally intelligent car / Courtesy of Tellart
Emotionally intelligent car / Courtesy of Tellart

Another example: Superflux’s Mitigation of Shock installations portrays a post-humanist model for adapting to climate change.

Mitigation of Shock installation / Superflux

And Kate Crawford and Vladan Joler offer a mini-essay on AI ethics.

Anatomy of an AI System / courtesy of Kate Crawford

Besides more minor complaints about lumping ML and AI together as one term, which is not my favorite to see as a technophile but tolerable, or a tendency to occasionally slide into less-than-nuanced conjecture about the implications of technology for society, the most glaring fault a landscape architect will likely see while reading is the omission of ML-driven design being produced in our discipline.

While certainly sparser than that of graphic arts, industrial design, or even architecture, human-machine design work does exist in landscape architecture. Landscape architects are using ML to iterate streetscape designs, explore novel approaches to coastal terraforming, and generate high-level urban design concepts, to name a few things. An author professing to speak to all of us ought to do some due diligence on that, and if she did, at least mention it — especially when she resides in a school that includes landscape architects and is theoretically aware of our impact as a design discipline.

Despite this criticism, it is hard to overemphasize the importance and utility of a book like Big Data. Big Design., which takes an overwhelmingly complex and technical subject and translates it into accessible language for designers of any discipline so that we can better understand how it affects us. The increasing spread of AI into every industry means that those who program AI systems in many ways design the societal outcomes those systems produce, even when said systems become completely autonomous. I agree with Armstrong when she writes “we human designers must be there to frame the right problems — the problems that will move us toward future points that truly benefit humanity.”

Phillip Fernberg, ASLA, is a writer, designer, and PhD Candidate in Landscape Architecture and Environmental Planning at Utah State University, whose work focuses on technology, culture, and design of the built environment.

Planners Must Now “Anticipate the Unanticipated”

Imagine Austin Growth Concept Map / City of Austin

“The planning practices of the past are inadequate for today’s challenges,” said David Rouse, ASLA, a landscape architect and planner, at the American Planning Association‘s National Planning Conference in San Diego. Rapid technological change, socio-economic inequities, natural resource depletion, and climate change are forcing planning and design professionals to adapt. “How can the practice of planning evolve to be more sustainable and equitable?”

In the 1920s, the Standard Zoning Enabling Act and the Standard City Enabling Act were passed. In the 1960s, the conventional 20th century planning model, which focused on land use policy and planning, came into being. In the 1980s, there was a shift to smart growth and “visionary, values-based planning.” In 2010, the American Planning Association began a process of rethinking past planning approaches through its Sustaining Places Initiative, which provided models and standards for how to prioritize sustainability through local planning.

According to Rouse, today’s comprehensive plans require a new 21st century model rooted in four key aspects. First, sustainability, resilience, and equity need to be at the center of all planning decisions. Second, a systems-thinking approach is needed. “A community is a system made up of sub-systems.” Third, any planning effort requires “authentic participation” and true community engagement that can answer the questions: “Where are we headed? Where do we want to go? How do we get there?” And lastly, there must be “accountable implementation,” including priorities for action, funding streams, policies that can guide decision-making, and specified responsibilities.

Rocky Piro, executive director of the Colorado Center for Sustainable Urbanism and former planning director of Denver, said Rouse and himself reviewed hundreds of plans for their new book — The Comprehensive Plan: Sustainable, Resilient, and Equitable Communities for the 21st Century. They found that “authentic engagement is foundational” to any new planning effort.

Planning processes must now include an engagement and communications strategy rooted in the issues and values of a community and be designed to reach all segments of a population. Any planning effort in 2022 also needs to be based in an understanding of the “impact of the past on the present.”

A vision statement is needed to kick-start these comprehensive planning efforts — “one with brevity, clarity, and the ability to inspire,” Piro said.

Land-use maps are still an important component of any comprehensive plan but they need to be smarter. In its plan adopted in 2012, Austin, Texas, created a “growth concept map” that includes places and their aspects (see image at top). Aurora, Colorado, included a “place typology” that includes a “sophisticated matrix” and a “place-based approach” in its plan.

Placetype plan / City of Aurora, Colorado

All communities are systems that include natural, built environment, social, economic, health, and regional connection sub-systems.

“Planning for natural systems has come out of the landscape architecture field,” Rouse argued. “Ecosystem planning should now happen in communities and in context with other planning elements instead of piecemeal.”

ASLA 2021 Professional Analysis and Planning Honor Award. Parsons Island Conservation and Regeneration Plan. Queen Anne’s County, Maryland, United States. Mahan Rykiel Associates

Planners and landscape architects need to increasingly plan for land, water, atmospheric, and biodiversity change within communities. And instead of planning for water use and quality alone, an entire watershed approach should also be integrated into comprehensive planning efforts.

The ecosystem component that landscape architects focus on can be integrated with the built environment components that planners focus on. Through the involvement of multiple disciplines, plans can address “land use, character, ecology, mobility, community design, and civic spaces, and public art.”

Other important systems that need to be included in any new comprehensive plan are social systems that improve equity — “the social infrastructure” of communities, including housing and education.

Economic systems also need to be re-thought for the 21st century. “Economic resilience is about creating opportunities for all in a fair and sustainable way. We can move to a circular economy and rely on local assets and regional resources. We need to move away from a linear, throw-away society.”

Health systems need to be factored into any planning effort, and this is not just “about disease prevention, but about healthy transportation and food systems. How we move and interface with the built environment impacts our health.”

There are now many lens — a “climate lens, equity lens, health lens. Can we bring the lenses together?”

Both Rouse and Piro returned to the idea that any planning effort can only happen with real community engagement.

Once the voice of the community in its totality has been considered, then a plan can be developed that results in the revision of regulations, codes, and ordinances to help achieve that plan. The next steps are to shift public and private investments to meet goals, align interests and decision-making processes within communities, and form public, private, and non-profit sector partnerships that can lead implementation.

In the 21st century, planners need to be “prepare communities for change, be proactive, and take an integrated approach instead of just reacting,” Rouse said.

The challenge is that planners are also operating within a “cone of uncertainty.” In the short term, there are tactics that can be used to manage community change, which may be foreseen or unforeseen and therefore disruptive. In the medium term, planners can set strategies and plans. But over the long-term, they will need durable visions. “All of this planning must happen sequentially and simultaneously.”

In their book, Rouse and Piro outline five core themes, including equity and engagement, climate change mitigation and adaptation, systems thinking, people-centered technology, and effective implementation.

“Equity must be interwoven, and an equity lens must be brought to all goals. Climate resilience must be a guiding principle of all planning work. Technology must be harnessed to serve communities. Planning participation is about co-creation with the community,” Rouse said.

“Planning is an art and a science. Our jobs are to anticipate the unanticipated. How can we do it better?” Out of the hundreds of plans that Rouse and Piro reviewed, “we couldn’t find one that did this well. It’s a journey society — and planners — must take. It’s the future of comprehensive planning.”

During the Q&A, one audience member asked whether “top-down, paternalistic comprehensive plans” are a thing of the past. A city comprehensive plan assumes there is one community in agreement, whereas there are many communities with different interests. The antithesis of a comprehensive plan is a neighborhood plan.

Community engagement is critical to forging consensus as is transparency about budgets and timelines, Piro argued. Ensuring grassroots buy-in is the “path to success.” But neighborhood plans need to be integrated with comprehensive plans and implemented in tandem. “You need consistency and coordination.” Ecological, social, and other systems “can’t be addressed in isolation.”

Another audience member wondered how comprehensive plans can address the communities who have been displaced due to gentrification. “How do we plan for who is not there?”

Rouse argued that it’s critical to retain populations by helping them create their own visions. “We can account for the past and systemic racism,” and planners and other design professions’ roles in creating those inequities.

Landscape Architecture in the News Highlights (February 16-28)

Drying lake bed / istockphoto.com

5 Takeaways from the Latest United Nations Climate Change Report — 02/28/22, The Washington Post
“The latest report from the United Nations Intergovernmental Panel on Climate Change is a warning letter to a world on the brink. A sweeping survey of the most advanced climate science on the planet, it recounts the effects rising temperatures are already having and projects the catastrophes that loom if humans fail to make swift and significant cuts to greenhouse gas emissions.”

A Bike Plan Revived: Adding a Path to the Olmsted-designed 33rd Street Greenspace — 02/28/22, Baltimore Fishbowl
“The city’s broader goals are to create a safe, well-used trail that makes the best use of the historic, picturesque median designed by the Olmsted Brothers (named a local landmark, along with the Gwynns Falls Parkway median, in 2015) and improves traffic and pedestrian safety at intersections.”

Best Apps for Urban Planning in 2022 – 02/28/22, Planetizen
“Mobile apps continue to redefine the practices of planning—urban planning, regional planning, transportation planning, community planning, and rural planning included.”

How ‘Solar Canals’ Could Help California Survive a Megadrought — 02/25/22, Fast Company Design
“In that 2021 study, we showed that covering all 4,000 miles of California’s canals with solar panels would save more than 65 billion gallons of water annually by reducing evaporation. That’s enough to irrigate 50,000 acres of farmland or meet the residential water needs of more than 2 million people.

How a Philadelphia Road Redesign Went off the Rails — 02/23/22, Bloomberg CityLab
“It isn’t uncommon for complete streets projects to become lightning rods for arguments about gentrification, says Leah Shahum, the founder and executive director of the Vision Zero Network, which pushes communities to adopt a goal of eliminating traffic deaths.”

Biden: Infrastructure Plan Gives $1B for Great Lakes Cleanup — 02/17/22, U.S. News and World Report, Associated Press
“The $1 billion for the Great Lakes from the bipartisan measure enacted in November, combined with annual funding through an ongoing recovery program, will enable agencies by 2030 to finish work on 22 sites designated a quarter-century ago as among the region’s most degraded, officials said Thursday.”

A Guide to Drones for Landscape Architects

Drone Technology in Architecture, Engineering, and Construction / Wiley

By Chris S. Sherwin, ASLA

The rise of consumer-friendly unmanned aerial vehicles (UAVs) have enabled landscape architecture firms to take advantage of new technologies and digital processing that have previously been out of reach. The growing availability of drones for designers makes the new book Drone Technology in Architecture, Engineering, and Construction by two landscape architects — Daniel Tal, FASLA, and Jon Altschuld, ASLA — a timely addition to any firm’s library.

The book enables a landscape architecture firm with little drone experience to understand step by how to work a drone and the opportunities and obstacles with owning and operating one. Tal and Altschuld have transformed a complex and obscure subject into accessible content. The book is meant to be read in a sequential manner: each chapter builds upon the other and offers resources for further study.

Tal and Altschuld begin the book by explaining the rapid transformation of UAVs from a military tool to hobby radio-controlled aircraft. Consumer-level drones enable design professionals and clients to better understand the environment from the bird’s eye view. Drones offer unlimited potential for imagery and photogrammetry within a 3D modeling environment and are an important tool for communicating how a proposed design can impact sites.

The risks and shortfalls of drone technology are outlined through an exploration of the difference between good looking data and good data. With new low-cost drones, site scanning often involves just pressing a couple of buttons on an app and setting the site parameters. A user can produce a very detailed and good looking data set without understanding how these technologies function. This can be a hindrance to producing good data.

A new drone user needs to understand that producing a precise and correct data set involves a deeper understanding of drone technology, surveying, and photogrammetry processing. An accurate model requires knowledge of how to set ground control points, provide specific camera angles in relation to the site being surveyed, and set a steady and continuous ground sampling distance from the site as the drone surveys the property. Fortunately, all of these areas are thoroughly covered by the authors.

Stunning drone images from past projects make for great marketing materials on future projects. / Daniel Tal

The book further explores how to effectively use drone data visualization as a project life-cycle tool. Chapters explain the costs necessary for staff training, examinations, and certifications; purchasing an appropriate drone; the software needed for flight, video and photo recording, photogrammetry; and insurance prior to your first flight.

Drone and 3D model overlay image of the 39th Avenue Greenway concept in Denver, Colorado. / DHM Design

Documentation, permissions, and licensing are also explored in-depth. The authors review the legal rules pertaining to consumer and commercial drone operations. Most importantly, they cover the Small Unmanned Aircraft Rule, which is known as 14 CFR Part 107, or in industry parlance the Part 107 exam. This exam is a crucial step in becoming a full-fledge drone operator in the design professions. Another vital step before becoming a commercial operator is understanding the permissions required through the Low Altitude Authorization and Notification Capability (LAANC) system, which allows for a relatively quick and seamless on-line process to gain permission before flying on site.

Proper documentation needs to be carried at all times. These documents include insurance certificates, your remote pilot license (Part 107), UAS registration, and a log of your flight operations. This documentation is key should something go wrong during your flight, and it is always a good rule of the thumb to be prepared for the worst case scenario.

Through the book, readers will gain an understanding of best flying practices, which many will gain with experience over time, and the importance of an appropriate safe flying mindset, such as developing a procedure for flight operations prior to, during, and at the conclusion of the flight. Situational awareness is key as well as proper flight procedures during manual and automated flying.

Tal and Altschuld explore basic drone photography, which many drone operators will use in the beginning of their flying career since it is relatively straightforward. Plus, the photographic results can be easily adjusted in commonly available Adobe Acrobat or Bluebeam software. Photo match overlays of the proposed project can easily be inserted into the existing site using Photoshop. 3D model photo overlays can also include integrating 3D modeling software models of the proposed design into the existing drone photography. This is a great tool for project visualization and client presentation meetings in which drone visualization images help communicate complex ideas easily and efficiently.

Bird’s Eye drone image of Hudson Gardens in Littleton, Colorado. The base image is used for 3D visualization. / DHM Design
The resulting image, post processed with Photoshop, integrating a Sketchup and Lumion Render creates an expressive, context-rich image. / DHM Design

Chapters on photogrammetry and 3D modeling are the most crucial, because these tasks will ultimately provide the most comprehensive data needed for advancing complex design projects. The catch is that photogrammetry, although simple in concept, is a relatively complex process that requires time and patience. The first-time drone user needs to make sure that the data acquired is consistent and free of bugs; otherwise, the end result – the 3D mesh point cloud — will be rife with topographical errors, and the resulting model will be inaccurate and not suitable for using as a 3D Mesh in Sketchup, Autodesk Revit, or ReCap.

Precision and patience are necessary to produce a highly refined and detailed 3D point cloud. The author explain the steps required for an accurate on-site scan, such as establishing ground control points, proper flight, image collection, and weather planning. These methods require further study and a trial period of trouble shooting. The drone user will most likely produce several versions of a photogrammetric model before arriving at a finished product.

Drone photogrammetry data along I-70 in Colorado. Left to right: initial point cloud, final point cloud, and 3D mesh. / Chinook Landscape Architecture and HDR. Inc.

Drone Technology in Architecture, Engineering, and Construction is well-written and concise enough that the reader will not get bogged down with the details but still be engaged throughout the process. It is perfect for landscape architecture firms seeking to purchase a drone but are unsure of next steps.

Chris S. Sherwin, ASLA, RLA, is managing director and drone mapping expert at CSS D/S LLP in Oakland, California and Ulaanbaatar, Mongolia.

New Research: The Built Environment Impacts Our Health and Happiness More Than We Know

ASLA 2020 Urban Design Honor award. Yongqing Fang Alleyways: An Urban Transformation. Guangzhou, China. Lah D+H Landscape and Urban Design

People living in dense cities are among the least happy. Their rates of depression are 40 percent higher than other populations; and their rates of anxiety are 20 percent higher. Why? Because the built environment is directly linked with happiness and well-being, and too often urban environments fail to put people at ease.

In a session at the American Planning Association’s virtual conference, Justin Hollander, professor of urban and environmental planning and policy at Tufts University, said planners, landscape architects, and architects have a responsibility to design a built environment that increases well-being. Through his fascinating research on cognitive architecture, he has found “we are deeply influenced by our surroundings” — even more than we know.

“We have an automatic (non-conscious) response to shapes, patterns, and colors. Our minds are like icebergs — we are only aware of less than 5 percent of our responses to our environment,” Hollander said. These findings, which are covered in greater detail in his book Cognitive Architecture: Designing for How We Respond to the Built Environment, co-authored with Ann Sussman, have significant implications for the planning and design of communities.

Hollander argued that “humans are wall-hugging species. Well-defined corridors and streets encourage our walking.” (see image at top)

On an innate level, humans are also “programmed to look for faces everywhere.” This may be why many traditional or vernacular buildings almost look like faces, with a central door and windows on either side.

A building that looks like a face / Ann Sussman, Tufts University

Humans connect with these forms because they help us tell stories about buildings and places. “We go to places because of stories we tell ourselves. We can imagine identities in these places. Tourist attractions always tell a story.”

Given nature is our original context, humans also have an innate biophilia — a deep attraction to and affinity for nature. “It’s an artifact of evolution.”

ASLA 2020 Landmark Award. Millennium Park — A Fortuitous Masterpiece. Lurie Garden by Gustafson Guthrie Nichol / P. Psyzka and City of Chicago

As we now understand, humans are drawn to landscapes that provide a refuge, a sense of safety, and prospect, a view of the entire scene, which supports that sense of safety. Storytelling is also important in landscapes, whether they are gardens, parks, or streetscapes. Humans are drawn to landscapes that provide clear sequences.

ASLA 2018 Professional Award of Excellence. Brooklyn Bridge Park: A Twenty Year Transformation, Michael Van Valkenburgh Associates / Juliane Schaer

At Tufts University, Hollander is examining students’ cognitive responses to a variety of images of the built environment. Through eye-tracking software, “we can see the unseen — we can see what our minds are looking at an unconscious level.”

In his lab, Hollander uses 3M’s visual attention software to map the path students’ eyes take across an image — where they fixate and experience an unconscious response to visual stimuli. In a study of 30 students, Hollander found they universally looked at the entrance and windows on a traditonal building first, ignoring the blank areas. And when he showed students’ eye tracks of a contemporary all-glass library, they fixated briefly on the edges, but the glass facade itself seemed faceless, almost invisible. They just looked at the sky because the image simply caused too much cognitive stress. (In the image below, the areas of highest fixation are in red, followed by orange, with blue indicating the least attention).

Eye tracking of a traditional building and a glass library / Justin Hollander and Ann Sussman, Tufts University

Hollander said eye tracking software shows that New Urbanist-style communities, which have homes closer to the street; traditional architecture that mimic faces; and sidewalks all “encourage walking.” If a pedestrian can see a sequence — one, two, three, four homes in a row — they are more likely to want to walk down that row. He knows this because he could see the students unconsciously looking at all the facades down the street in a sequence.

In contrast, an image of a row of parking garages, with no clear doors or windows, caused students to scan for windows, quickly give up, and again look at the sky. “There was far less visual intensity, and it’s a less walkable environment.”

Flags and columns succeed in grabbing attention, which has been known for millennia. Flags predate permanent settlements, and the ancient Greeks and Romans used columns in their architecture.

Why does this matter? Hollander argues that environments that are easier to fixate on cause less cognitive stress.

Megan Oliver, an urbanist based in Baltimore, Maryland, and founder of Hello Happy Design, said the research of Hollander and others is critical, because there is a “mental health crisis” in the U.S., particularly American cities.

People are constantly responding to the built environment and in turn trying to shape it in order to reduce the impact of environmental stressors, such as blank glass or concrete building facades, crowds, noise, and air pollution. These stressors combine to make people anxious, sick, and unhappy.

In contrast, happy places are designed to encourage pro-social behavior. This is because “people need social connections in order to thrive.” Happy places help create layers of social relations, including “weak ties,” which are actually very important. “Weak ties create a sense of belonging and identity. They build trust, which helps pull communities through challenges.” Communities with higher weak ties and trust fought the COVID-19 pandemic better.

ASLA 2018 Professional General Design Honor Award. Walker Art Center Wurtele Upper Garden, Minneapolis, Minnesota. Inside | Outside + HGA / Theodore Lee

Oliver argued that communities with pro-social behavior are also more inclusive and participatory and therefore better at shaping the built environment to meet their needs. The ethos in these communities is “change ourselves by changing the city.” These communities shape their spaces, creating shared identity through gardens, public art, and other improvements that help reduce stressors. Happy places then go beyond “places we inhabit and become extensions of ourselves.” These places enable us to “bond with the environment around us.”

A related conversation, also with Hollander, occurred at the Congress for New Urbanism’s 2021 Virtual Gathering. In a rapid-fire Zoom roundtable, the debate about what makes people happy or not in the built environment continued.

Architect Don Ruggles, CEO of Ruggles Mabe Studio, argued that “humans are always looking for safe spaces. We think about survival every minute of the day. But beauty is equally as important. We have an intuitive response — it creates a sense of pleasure.”

The problem, he argues, is that “our survival instinct is about five-to-seven times stronger than our pleasure instinct,” so anything in the built environment that is a stressor overwhelms our ability to experience beauty. He called for designers to focus on projects that engage our parasympathetic system that create deep relaxation so that pleasure can be experienced.

According to Nikos Salingaros, professor of mathematics, architecture, urban, and complexity theory at the University of Texas at San Antonio, architects today are wed to a style rooted in 1920s Germany — the Bauhaus — that creates an unhealthy built environment. “Trillions of dollars are wasted on creating stylistically irrelevant glass boxes that are essentially invisible to people. Whole cities — districts, neighborhoods, and downtowns — have become invisible, because of the geometries and math of the structures built.” Given humans are cognitively stressed by Modernist or contemporary glass buildings, these places are “close to malpractice, based on the medical evidence.”

Instead, Salingaros called for privileging human connections through walkable, bikeable places. “Start with network connectivity. No giant blocks. Create intimate networks that are comfortable to humans.” Furthermore, all urban spaces should be “continuations of those people-centric networks. Use the correct dimensions, apply pattern languages, and make the boundaries of buildings and spaces permeable.”

Urban designers, architects, and landscape architects should be “applying mathematical symmetries at multiple scales. The urban, landscape, architectural, and ornamental scale should all be aligned through sub-symmetries” — or the entire design will fail. “The measure of success will be the flow of people.”

He especially cautioned against contemporary buildings that purposefully try to be disharmonious — “these place intentionally violate symmetry laws,” creating stress in their attempt to grab attention.

For Ann Sussman, an architect, author, and researcher, designers can retrofit environments that create stress and anxiety, but only to a degree. She pointed to a project in Somerville, Massachusetts, where the negative impact of the blank concrete wall of a parking garage was mitigated through public art and greenery. Students shown the blank wall and then an image of the redesigned wall while wearing eye-tracking monitors experienced higher visual fixation on the art.

But in the case of a car-centric suburb, with a wide road with few houses along it, even adding in sidewalks would do little to reduce the impact of its inherent car-centric nature. “As people look down the street, they can’t fixate on the sidewalk and therefore safety. There are some suburbs built in the 1950s and 60s that just will never be walkable. These places are too foreign to our brain architecture.”

Unfortunately, new developments can have the same problems. Sussman asked: “Why is the Seaport district in South Boston so loathed? It’s because people can’t focus on it — they can’t anchor their sight on the glass buildings, so their fixation is anchored to the sky.”