CityJSON

.NET 6.0 Library for reading CityJSON files (https://www.cityjson.org/)

NuGet package: https://www.nuget.org/packages/bertt.CityJSON/

Dependencies

• NetTopologySuite

Sample code

Reading CityJSON file:

var json = File.ReadAllText("fixtures/minimal.city.json");
var cityjsonDocument = JsonConvert.DeserializeObject<CityJsonDocument>(json);

Sample reading CityJSON 2.0 Seq file and converting to NetTopologySuite:

var cityJsondocuments = CityJsonSeqReader.ReadCityJsonSeq("./fixtures/cityjsonseq/paris_tower.city.jsonl");

Convert CityJSONDocument to NetTopologySuite:

var features = cityjsonDocument.ToFeatures(vertices, transform);

Converting CityJSON object to NetTopologySuite:

var feature = cityObject.ToFeature(vertices, transform);

Tools

• cj2pg: from CityJSON to PostGIS

• cj2gltf: from CityJSON to glTF

Known limitations

• Geometry type support: Solid, CompositeSurface, MultiSurface, MultiSolid, CompositeSolid;

• Support for interrior rings;

• Appearance support: Textures, Vertices-Texture;

• No support for metadata, semantics, extensions, materials;

• No support for writing CityJSON files;

History

2025-01-15: release 2.1 - Reading CityJSON 2.0 Seq files

2024-12-06: release 2.0 - Refactoring - Reading geometries

2024-12-04: release 1.1 - to .NET 8.0

2022-11-22: from CityJSON 1.0.1 to CityJSON 1.1.2

2022-11-22: to .NET 6

2020-07-27: original coding