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GCRICities and Built EnvironmentIn development
Cities and Built Environment · Field overview

Field overview

The study of cities and the built environment asks how people, buildings, land, networks and institutions combine in dense places, and how that combination produces safety or harm. It draws on planning, architecture, civil and structural engineering, transport, geography, economics and the social sciences. On Cities and Built Environment, The Global Centre for Risk and Innovation (GCRI) treats the field as risk science: what makes urban places exposed, what makes their people vulnerable and what helps them recover.

Publisher
The Global Centre for Risk and Innovation
Field
Cities and built environment, Critical infrastructure, Society and human development
Status
In development
Service level
R0: information and enquiries

The interactive map needs JavaScript; the layer list and sources are below.

Layers 3

Urban signals, for this page

Latest available

NASA GIBS / EOSDIS · ASTER GDEM (METI, NASA) · Blue Marble (NASA) · © OpenStreetMap contributors (ODbL) · Natural Earth

Loading the latest NASA imagery.

Drag to move. Ctrl or ⌘ and scroll, pinch or the buttons to zoom; hover for the values under the pointer; reset returns to the region.

For field overview, in GCRI's spatial-intelligence reading, the map opens on night lights, population density and true-colour imagery with built-up and settlement extent from NASA GIBS, framed on India; 3 further NASA layers wait in the list.Satellite and model products as NASA publishes them, each with its own date; indicators, not assessments of any place; claim ceiling INTEGRATED.

Data: NASA GIBS · ASTER GDEM · Blue Marble · © OpenStreetMap contributors · Natural Earth · Copernicus Sentinel-2 L2A · CIESIN/Columbia, NASA SEDAC HBASESources and licences

  • We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Science Data and Information System (ESDIS). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Science Data and Information System (ESDIS). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • VIIRS Black Marble night-time lights, NASA Goddard Space Flight Center; distributed by the NASA Level-1 and Atmosphere Archive and Distribution System (LAADS DAAC); imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • Center for International Earth Science Information Network (CIESIN), Columbia University. 2018. Gridded Population of the World, Version 4 (GPWv4): Population Density, Revision 11. NASA Socioeconomic Data and Applications Center (SEDAC). Licensed under CC BY 4.0. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). CC BY 4.0
  • VIIRS near-real-time products (flood, land surface temperature, snow cover, corrected reflectance), NASA LANCE; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • MODIS land products (vegetation indices, gross primary production, land cover), NASA LP DAAC and LANCE; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • ASTER GDEM is a product of METI and NASA (ASTER Global Digital Elevation Model V003, NASA LP DAAC); imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com. Public domain
  • © OpenStreetMap contributors (ODbL), via NASA GIBS (coastlines, boundaries, roads and place names). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). ODbL
  • Blue Marble, NASA Earth Observatory; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
  • Context on the globe and flat map: coastlines, boundaries, roads and place names from NASA GIBS reference layers (OpenStreetMap data, ODbL, © OpenStreetMap contributors); Blue Marble imagery as an optional base; 3D terrain and the elevation read-out from the ASTER GDEM elevation colour index (5 m to 200 m classes, exaggerated for legibility). Boundaries are drawn as published and imply no position on any territory.
  • Globe: MapLibre GL JS 6.9.1, BSD-3-Clause, © MapLibre contributors.
  • Observed (EO): Copernicus Sentinel-2 L2A (contains modified Copernicus Sentinel data 2026), Microsoft Planetary Computer
  • Context: CIESIN/Columbia, NASA SEDAC HBASE. Center for International Earth Science Information Network (CIESIN), Columbia University, and NASA Socioeconomic Data and Applications Center (SEDAC): Global Human Built-up And Settlement Extent (HBASE) 2010; Seto, Guneralp and Hutyra 2012, Global Grid of Probabilities of Urban Expansion to 2030; Global Urban Heat Island (UHI) Data Set, 2013.
  • Optional layers (17 sources in the layer list: live, forecast, observed and context) print their provider credit on the map and here when switched on; forecasts are model output and derived indices are estimates.

Layers and dates

  • Night-time lights, daily: VIIRS Black Marble (VNP46A2), NASA LAADS DAAC · 12 Oct 2026
  • Population density, 2020: Population: CIESIN, Columbia University, Gridded Population of the World v4.11 (2018), NASA SEDAC, CC BY 4.0 · static
  • True colour: VIIRS NOAA-20 corrected reflectance, NASA LANCE · 13 Oct 2026
  • Land cover type (IGBP), yearly: MODIS Terra and Aqua land cover (MCD12Q1), NASA LP DAAC · 2024
  • Land surface temperature, day, 8-day composite: VIIRS NOAA-20 Level 3, 8-day, NASA LANCE · 14 Sep 2026
  • Flood water, 3-day composite: VIIRS Global Flood Product, NASA LANCE · 14 Oct 2026

GeographyFor field overview, in GCRI's spatial-intelligence reading, the map opens on night lights, population density and true-colour imagery with built-up and settlement extent from NASA GIBS, framed on India; 3 further NASA layers wait in the list.

STEM methods
9
Canonical methods this field applies
Topics
8
Subject pages in the field
Counterparts
5
Platforms in shared fields at GCRI, GRF and GRA
Report series
2
Nexus Reports series it contributes to
01In brief

The short answer.

The Cities and Built Environment field covers urban development, buildings, mobility, infrastructure, housing and human-scale resilience. Experts in it study questions such as urban growth and land and housing and affordability, with methods such as structural and earthquake engineering as well as urban and transport engineering. Its counterparts at GRF and GRA look at the same systems through governance and finance.

02Canvas

One field, three institutions.

Canvas · one field, three institutionsDesign, not a record
One field, three institutions: Cities and Built Environment and its counterpartsGCRI studies the field as science, GRF governs and convenes it, GRA builds shared financial understanding; the Nexus Universe tests work across them and the competent authorities decide. Design of the arrangement, not a record.

Fig.How GCRI, GRF and GRA share one field while the authorities decide. Design, not a record.

03Console

Field overview, in outline.

The working screen behind this subject: its structure, terms and states. Names are placeholders and values illustrative.

Field overview: the screen's structure, terms and states for Cities.Placeholder names and illustrative values; a design, not a record or a live system.
04Why it matters

Where most people, assets and services meet.

Cities hold most of the world's population growth, economic output and public infrastructure. Decisions made in them last for generations: a road, a district or a building stock locks in exposure and energy use for decades. Rapid urban growth in many regions is happening faster than planning, servicing and building control can follow, so a large share of new urban space is built informally or without effective standards.

Hazards meet this growth. Heat, flooding, storms, earthquakes and landslides interact with urban form, and their effects depend on who lives where, in what housing, with which services.

05What experts study

Five lines of inquiry.

  1. 01

    Form and land

    How density, land use and expansion affect exposure and service costs. See urban growth and land.

  2. 02

    Buildings

    How structures perform under heat, wind, water and ground shaking, and how codes are applied. See buildings and heat.

  3. 03

    Networks

    How transport, water, power and communications serve the city and fail together. See urban utilities.

  4. 04

    People

    How tenure, income, age, disability and social ties shape vulnerability. See informal settlements.

  5. 05

    Institutions

    How planning authority, finance and enforcement shape what gets built. See municipal governance interface.

06How it connects

Urban risk is always shared risk.

Urban systems draw on regional water, energy and food supplies and on national finance and law. A city's exposure is also an exposure for its insurers, lenders, utilities and public budgets. Dependencies and consequences maps these links in detail.

The same field is governed at The Global Risks Forum (GRF) through Disaster and Crisis Governance and examined for its financial dimension at The Global Risks Alliance (GRA) through Development Finance Nexus. The wider field gateway is cities and built environment.

07Key terms

Terms used on this page.

Each term as this page uses it. Where a standard-setting body defines the term, the wording follows that body.

TermDefinition
Urban heat islandThe tendency of cities to be warmer than their surroundings because built surfaces store heat and vegetation is scarce.
Informal settlementA residential area whose inhabitants lack secure tenure, often without basic services or compliance with planning rules.
Green infrastructureA planned network of natural and semi-natural areas that delivers services such as cooling and stormwater management.
Systemic riskRisk arising from the interactions and dependencies within and between systems, where a shock can propagate and threaten the functioning of the whole.
08Methods

Built on named methods.

Work in the field relies on geospatial information systems, spatial statistics, structural and earthquake engineering, urban and transport engineering and social and behavioural science, among others. Each states its assumptions and uncertainty.

09Pages

Pages in Field overview.

10Questions

Questions and answers.

Is urban risk mainly about natural hazards?
No. Hazards matter, but much urban risk is created by where and how cities grow, how buildings are made and who can afford safe housing.
Does the field include rural settlements?
Its focus is urban and peri-urban areas, including the fringe where cities expand into farmland and natural land.
Where do I find the methods?
On the STEM foundation page and methods and uncertainty.
Cities and Built Environment

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The current service level is R0: information and enquiries. An enquiry receives a reference and names the next step; applications, payments, compute allocations and registrations open only when their team, terms and review capacity exist.