Cities concentrate exposure: people, buildings and networks share the same streets, codes and service footprints, and urban growth decides tomorrow's losses today. This subsite relates urban risk, construction, real-estate and urban-agenda instruments so that a building, a district and a city plan can carry one consistent record. Every artifact of these areas carries a UNI (Unique Nexus Identifier), which identifies and never certifies.
Nexus Standards (2026). Cities and the Built Environment: master subsite of the Nexus Standards (PROPOSED areas). https://nexustandards.com/cities/. Last reviewed 2026-10-17.
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Every area of the subsite with its tier, status, the Nexus Standards it lists, the open standards it names, its feeds and its couplings. Area entries are PROPOSED; registry rows are named where they exist.
Area index1 of 5 areas have a registry row; the rest are proposed areas with a full context entry and no registry row yet. Feed counts include sources pending admission.
Open Earth observation layers framed on india, as an example geography for cities and the built environment: context for where its records live, never an assessment and never a statement of where the standards apply. Layers, dates and credits are on the map.
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Layers 2
Urban signals
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Latest available
NASA GIBS / EOSDIS · ASTER GDEM (METI, NASA) · Blue Marble (NASA) · © OpenStreetMap contributors (ODbL) · Natural Earth
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Night-time lights, population density, nitrogen dioxide and urban heat, framed on India.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
20 coupling rows join this subsite's areas to 9 other subsites, counted from the systemicContext rows of the area context bank in both directions. Select a card on the canvas to trace it.
Fig.Edge labels count coupling rows. GATE marks a subsite, DONE and RUNNING an area of this subsite. Tags give reading order only. Design, not a record.
| Coupled subsite | Rows | Example mechanism |
|---|---|---|
| Climate and Earth Systems | 3 | Exposure: coastal cities face compound surge and river flooding.Oceans and coasts risk standards to Cities and urban systems risk standards |
| Finance, Insurance and the Economy | 3 | Mortgage and real estate lending carry physical risk from the building stock.Construction and real estate to Banking |
| Hazards and Disaster Risk Reduction | 3 | Mechanism: impervious surfaces amplify pluvial flooding and the urban heat island amplifies heatwaves.Cities and urban systems risk standards to Hydrometeorological hazard standards |
| Industry, Trade and Supply Chains | 3 | Construction materials supply chains affect reconstruction speed after disasters.Construction and real estate to Industry and manufacturing |
| Energy and Critical Infrastructure | 2 | Cascade: failure of power, water or transport networks in a city propagates across dependent services.Cities and urban systems risk standards to Critical infrastructure and critical entities |
| Governance, Security and Society | 2 | Local DRR strategies are adopted by local governments and reported nationally under Sendai target E.Cities and the built environment to Public sector and government |
| Water and Food Systems | 2 | Urban flooding and combined-sewer overflows couple drainage assets with land use and building exposure.Water utilities and basins to Cities and the built environment |
| Health and Biosecurity | 1 | Cascade: density and informal settlement raise outbreak transmission and heat mortality.Cities and urban systems risk standards to Health risk standards |
| Area | NS-0 | NS-1 | NS-3 | NS-5 | NS-9 | NS-10 | NS-11 | Listed |
|---|---|---|---|---|---|---|---|---|
| Cities and urban systems risk standards | 7 | |||||||
| Cities and the built environment | 6 | |||||||
| Construction and real estate | 5 | |||||||
| New Urban Agenda alignment | 3 | |||||||
| UN-Habitat and urban areas | 2 |
Standards that applyA filled cell means the area's context entry lists that Nexus Standard. Context entries are PROPOSED; no cell is a conformance, certification or readiness statement.
Provider, licence, delivery path and register status for each source. A source is live on a public page only after an owner decision admits it; until then it reads pending admission.
No legal register row admits any of these sources for live display on public pages yet, so nothing is read from them here. A register row that exists records the source for the governed GRIx path; admission for public pages is a separate owner decision.
Copernicus EMS rapid mapping activationspending admission
Copernicus Emergency Management Service · event-driven
Copernicus free, full and open data policy
GRIx governed readregister row exists
Global Human Settlement Layerpending admission
European Commission JRC · multi-year epochs
CC BY 4.0 under the Commission reuse policy
GRIx governed readregister row exists
Global Human Settlement Layerpending admission
European Commission Joint Research Centre · periodic releases
CC BY 4.0
GRIx governed readregister row exists
Global Human Settlement Layer (built-up, population, Degree of Urbanisation)pending admission
European Commission Joint Research Centre · periodic releases
CC BY 4.0
GRIx governed readregister row exists
OpenStreetMappending admission
OpenStreetMap Foundation and contributors · continuous
ODbL 1.0
GRIx governed readregister row exists
OpenStreetMap buildings and infrastructurepending admission
OpenStreetMap contributors · continuous
ODbL 1.0
GRIx governed readregister row exists
OpenStreetMap planet and replicationpending admission
OpenStreetMap Foundation and contributors · minutely
ODbL-1.0
GRIx governed readregister row exists
Overture Maps buildings themepending admission
Overture Maps Foundation · monthly
ODbL 1.0 (buildings theme)
GRIx governed readregister row exists
World Development Indicatorspending admission
World Bank · annual with quarterly updates
CC BY 4.0
GRIx governed readregister row exists
WorldPop gridded populationpending admission
WorldPop (University of Southampton) · annual
CC BY 4.0
GRIx governed readregister row exists
WorldPop gridded populationpending admission
WorldPop, University of Southampton · annual
CC BY 4.0
GRIx governed readregister row exists
BIS statistics (banking, credit, debt securities, property prices)pending admission
Bank for International Settlements · quarterly
BIS terms of permitted use of statistics (unrestricted use with the BIS cited as source)
GRIx governed readproposed register row
UN-Habitat Urban Indicators Databasepending admission
UN-Habitat · annual
UN-Habitat terms of use (to be confirmed)
build-time snapshotproposed register row
Indicator names and codes as their stewards publish them; values appear only from a governed GRIx source, never typed into a page.
Cities and urban systems risk standards · GCRI Canada may admit urban exposure records that state footprint source, date and completeness as research evidence; GCRI Canada decides under its own evidence and research rules, and no approval is implied.
Cities and the built environment · Exposure and loss records with boundary versions and licences become readable as evidence for GCRI Canada urban risk research, which applies its own rules.
Construction and real estate · Building exposure and retrofit records with provenance become readable as evidence for GCRI Canada exposure research under its own rules.
2 more areas state what this pathway reads; each area page has its own line.
Cities and urban systems risk standards · GRF may record municipalities that adopt the urban records in local DRR strategies as a recognition dialogue; GRF decides under its own recognition rules, and no recognition or endorsement is implied.
Cities and the built environment · A city that publishes its local strategy clauses and scorecard attestations gives GRF a record trail to consider; no recognition is implied.
Construction and real estate · A developer or owner that publishes building resilience clauses and attestations gives GRF a record trail to consider; nothing is recognised by adoption.
2 more areas state what this pathway reads; each area page has its own line.
Cities and urban systems risk standards · GRA may read urban exposure and service-network records when it considers municipal resilience finance; GRA decides under its own capital-readiness rules, and no approval, rating or investment view is implied.
Cities and the built environment · Urban resilience projects can present verified exposure and service-continuity baselines to GRA for capital-readiness assessment under its own rules.
Construction and real estate · Retrofit and resilient-building investments can present verified exposure and vulnerability records to GRA for capital-readiness assessment.
2 more areas state what this pathway reads; each area page has its own line.
Each institution decides under its own rules what it reads as evidence; no pathway is an approval, a readiness statement or investment advice.
Each area proposes a working group with a scope, deliverables and liaison targets; a liaison is sought, never claimed, until the body confirms it in writing.
| Area | Working group scope | Deliverables | Liaison sought |
|---|---|---|---|
| Cities and urban systems risk standards | Records for urban exposure, heat, flood and service networks that work with open building data and local DRR strategies. | 3 | 4UN-Habitat, UNDRR Making Cities Resilient 2030, Humanitarian OpenStreetMap Team, Global Covenant of Mayors |
| Cities and the built environment | Profile urban exposure, service and local strategy records and crosswalk them to Sendai local targets, MCR2030 and open city-model standards. | 3 | 4UNDRR (Making Cities Resilient 2030), UN-Habitat, Open Geospatial Consortium, ICLEI |
| Construction and real estate | Profile building information and exposure records and crosswalk them to IFC, CityGML and resilient-infrastructure principles. | 3 | 4buildingSMART International, Open Geospatial Consortium, UNDRR, UN-Habitat |
| New Urban Agenda alignment | Maintain the New Urban Agenda and SDG 11 crosswalk and the city record profile. | 3 | 2UN-Habitat (information exchange sought; none recorded), European Commission Joint Research Centre GHSL team… |
| UN-Habitat and urban areas | Describe UN-Habitat's urban data accurately and develop city record profiles using harmonised definitions. | 2 | 2UN-Habitat Data and Analytics (information exchange sought; none recorded), European Commission JRC GHSL team… |
Pick an area above, adopt its proposed charter and file it as a docket under NS-13; editors decide with written reasons. Develop a standard
Every area entry is PROPOSED: a pull request against the area context bank names the change and its source, peer-reviewed or published statistics.
Propose a feed with provider, licence and delivery path; Legal/IP records the terms and the owner decides admission. Agents never admit a source.
Contribute to an external standard through its own body's channels; the outcome comes back here as a register change. Movement and contribution
Peer-reviewed sources and published statistics as the area entries cite them, newest first within each type.
The Nexus Risk Standards read in Cities and the Built Environment and its library: scope, codes, schemas, conformance, governance, templates, crosswalks, change log and how to contribute.
K and X
LibraryRisk Academy disciplines that teach Cities and the Built Environment, with their courses; the GCRI Canada, The Global Risks Forum (GRF) and The Global Risks Alliance (GRA) subsites that carry those disciplines; and the Nexus Foundry systems the standards name. Mappings are proposed for review (Risk Academy standards map, 2026-10-17); a link says a page on the same subject exists, never an endorsement or a conformance statement; framework names in course titles are named and linked, never reproduced.
Charter a working group, correct a brief or name a source. Area entries are PROPOSED content for the Nexus Standards registry; a UNI identifies and never certifies, and nothing on this site is a certification, an approval or a readiness statement.
Nexus Standards documents CC BY 4.0 · tooling Apache-2.0 · counsel review pending (DEC-2026-10-16-NEXUS-STANDARDS-OPEN-LICENCE). External standards are named and linked under their own licences; a UNI (Unique Nexus Identifier) identifies, it never certifies. · Generated from the Nexus Standards corpus at commit 437ae044c5cb (2026-10-17); proposed and open.