city
Let an agent handle cities by legal status, boundaries, population, governance and services, and resolve the several definitions of a city (administrative, urban area, metropolitan).
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent handle cities by legal status, boundaries, population, governance and services, and resolve the several definitions of a city (administrative, urban area, metropolitan).
A large, permanent human settlement with a dense population and urban functions, usually with a legal status as a city or municipality granted under national law.
What it is for: Concentrating people, work, services and culture in one place.
It can be live, work and visit there; govern it, through a municipal council and mayor; measure it, by population and area under a stated definition; plan and build it, under planning law.
Distinguishing features
Legal city status differs by country
Administrative city, urban area and metropolitan area are different units
Has a local government
Capital status is a separate designation
What it looks like
Dense buildings, streets, public spaces and infrastructure, often with a historic centre and growing outskirts; historic cities may have walls.
Physical character
population: 10000-37000000 people - depends on definition and country
population density: 1000-40000 people/km2
How it is recognised
Dense built-up area and street grid
City limits signs and municipal boundaries
Different definitions give different outlines on maps
Related models
is a kind of - alongside towns and villages
is governed by - local government
contains - urban fabric
is confused with - a larger statistical unit
In practice
Families and kinds
capital city
megacity
historic walled and fortified towns
planned and ideal cities
twin cities and conurbations
Identifiers
national municipality code country-specific for example INSEE codes in France
UN/LOCODE five characters trade and transport locations
GeoNames id numeric gazetteer
Standards and regulation
National law on municipalities and city status
EU-OECD Degree of Urbanisation definition
Planning and building law
Failure modes and hazards
Comparing populations under different definitions
Confusing a city with its metropolitan area
Out-of-date boundaries after mergers
Also called
+209
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.city-group
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Definition and boundaries What counts as the city.
The same city has several outlines.
Definition
Administrative, urban, metropolitan.
Definition used
The definition behind a figure.
- Which definition of the city does this figure use? provenance
- How does it differ from the others? measurement
Legal status
City status and capital.
Legal status
Legal status under national law.
- Does it have legal city status, and since when? provenance
- Is it a capital, and of what? definition
Population and economy People and work.
Population figures need a date and definition.
Population
Counts and density.
Population
Population with date and source.
- What is the population, as of when, from which source? measurement
- How is it changing? measurement
Economy
Main activities.
Economy
Economic structure.
- What are its main economic activities? definition
- What is its role in the region? definition
Governance and services Who runs it and what it provides.
Residents deal with the city through its services.
Local government
Council and mayor.
Government
Local government structure.
- How is the city governed, and who is the mayor? provenance
- Which services does it provide directly? definition
Services
Transport, utilities, safety.
Services
Key services.
- How are transport, water and waste handled? definition
- How do residents contact the city? action
Place and history Where and how it grew.
Location and history explain form and identity.
Location
Coordinates and region.
Location
Location and region.
- Where is the city, and in which region? definition
- Which identifiers locate it? provenance
History
Founding and growth.
History
Key historical facts.
- When and how was it founded? provenance
- Has it had other names? provenance
What the second pass must settle
- Should cities be instances with a stated definition for every figure?
- How should mergers and renamings be tracked?
- Which definition should the registry use by default?