The Global Centre for Risk and Innovation (GCRI)
The methods Cities and Built Environment relies on, the assumptions they carry and the limits of what they can show.
Fig.How a finding is reviewed before it is published. Design, not a record.
The Cities and Built Environment methods page sets out the methods the platform relies on, among them structural and earthquake engineering, urban and transport engineering, and geospatial information systems, with their assumptions, validation and limits. Each analysis lists its assumptions and data, reports ranges and confidence beside central estimates, is checked against observations or other models, and states what it cannot show.
For methods and uncertainty, in GCRI's spatial-intelligence reading, the map opens on true-colour imagery, night lights and land cover with true colour from NASA GIBS, framed on India; 3 further NASA layers wait in the list.
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Layers 3
Urban signals, for this page
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NASA GIBS / EOSDIS · ASTER GDEM (METI, NASA) · Blue Marble (NASA) · © OpenStreetMap contributors (ODbL) · Natural Earth
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For methods and uncertainty, in GCRI's spatial-intelligence reading, the map opens on true-colour imagery, night lights and land cover with true colour 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.
Layers and dates
| Source | Why it matters here | How it is reported |
|---|---|---|
| Built-up extent | Products differ in definition and resolution | Product named, accuracy stated |
| Building inventories | Attributes such as construction type are often inferred | Inferred attributes labelled |
| Urban climate | Heat varies street by street | Resolution of heat products stated |
| Population at night and day | Exposure differs by time of day | Both shown where available |
City-level indicators follow ISO 37120 and 37123 definitions where cities report them.
Each analysis lists its assumptions and the data it depends on.
Ranges and confidence are reported alongside central estimates.
Models are checked against observations and, where possible, against other models.
What an analysis cannot show is stated beside what it can.
Each term as this page uses it. Where a standard-setting body defines the term, the wording follows that body.
| Term | Definition |
|---|---|
| Uncertainty quantification | Characterising and propagating the uncertainties in a model to state confidence in its outputs. |
| Sensitivity analysis | Repeating an analysis under different assumptions to show how much the result depends on them. |
| Model validation | Comparing model predictions with independent observations to judge fitness for a stated use. |
| Structural and earthquake engineering | Structural and earthquake engineering designs buildings, bridges and other structures to carry loads safely, including those from earthquakes, wind and floods. |
The bodies and documents this page is read against. Status and editions change; each link goes to the issuing body.
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.