CityJSON
E856272
CityJSON is a JSON-based encoding for 3D city models that serves as a simpler, developer-friendly alternative to the CityGML standard.
All labels observed (1)
| Label | Occurrences |
|---|---|
| CityJSON canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10330203 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: CityJSON Context triple: [CityGML, relatedStandard, CityJSON]
-
A.
TfL Road Network
The TfL Road Network is the set of major roads in Greater London managed by Transport for London, including key arterial routes that support the city’s primary traffic flows.
-
B.
Westferry Circus
Westferry Circus is a landscaped roundabout and public open space on the western side of Canary Wharf in London, featuring gardens, walkways, and access to nearby offices and the River Thames.
-
C.
Paternoster Square
Paternoster Square is a modern commercial and public plaza in the City of London, located near St Paul’s Cathedral and home to the London Stock Exchange.
-
D.
Eastgate Square
Eastgate Square is a shopping mall and major transit hub located in Hamilton, Ontario, Canada.
-
E.
Kingsway Centre
Kingsway Centre is a major shopping complex located in the city centre of Newport, Wales, featuring a range of retail stores and services.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: CityJSON Target entity description: CityJSON is a JSON-based encoding for 3D city models that serves as a simpler, developer-friendly alternative to the CityGML standard.
-
A.
TfL Road Network
The TfL Road Network is the set of major roads in Greater London managed by Transport for London, including key arterial routes that support the city’s primary traffic flows.
-
B.
Westferry Circus
Westferry Circus is a landscaped roundabout and public open space on the western side of Canary Wharf in London, featuring gardens, walkways, and access to nearby offices and the River Thames.
-
C.
Paternoster Square
Paternoster Square is a modern commercial and public plaza in the City of London, located near St Paul’s Cathedral and home to the London Stock Exchange.
-
D.
Eastgate Square
Eastgate Square is a shopping mall and major transit hub located in Hamilton, Ontario, Canada.
-
E.
Kingsway Centre
Kingsway Centre is a major shopping complex located in the city centre of Newport, Wales, featuring a range of retail stores and services.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
3D city model format
ⓘ
JSON-based encoding ⓘ data format ⓘ |
| alternativeTo | CityGML ⓘ |
| basedOn | JSON ⓘ |
| compatibleWith | CityGML data model (conceptually) ⓘ |
| designPrinciple |
ease of parsing for developers
ⓘ
flat and predictable structure ⓘ human-readable structure ⓘ machine-readable structure ⓘ reduced complexity compared to CityGML ⓘ |
| domain | 3D city models ⓘ |
| encodingType | vector-based 3D geometry ⓘ |
| fileExtension | .json ⓘ |
| geometryModel | boundary representation (B-Rep) ⓘ |
| goal |
to be developer-friendly
ⓘ
to be simpler than CityGML ⓘ |
| hasAdvantageOver |
CityGML in ease of implementation
ⓘ
CityGML in file size in many cases ⓘ CityGML in web integration ⓘ |
| hasFeature |
explicit city object identifiers
ⓘ
support for appearance information ⓘ support for hierarchical city object structures ⓘ support for multiple geometries per object ⓘ support for references between objects ⓘ support for thematic classes ⓘ |
| intendedAudience |
3D city modelers
ⓘ
GIS practitioners ⓘ software developers ⓘ |
| purpose | to encode 3D city models ⓘ |
| serializationFormat | text ⓘ |
| supports |
CityGML concepts
ⓘ
LOD (Levels of Detail) ⓘ attributes on city objects ⓘ geometric 3D city objects ⓘ metadata for city models ⓘ multi-LOD representations of city objects ⓘ multiple city object types ⓘ semantic 3D city objects ⓘ |
| typicalUse |
GIS and 3D city analysis workflows
ⓘ
exchange of 3D city models ⓘ storage of 3D city models ⓘ web-based 3D city applications ⓘ |
| usedIn |
3D city modelling
ⓘ
3D visualization of cities ⓘ geospatial software ⓘ smart city applications ⓘ urban planning ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: CityJSON Description of subject: CityJSON is a JSON-based encoding for 3D city models that serves as a simpler, developer-friendly alternative to the CityGML standard.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.