CityJSON

.NET 8.0 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 cityjson = JsonConvert.DeserializeObject<CityJsonDocument>(json);
Assert.IsTrue(cityjson.Version == "1.0");

Sample reading CityJSON 2.0 Seq file and converting to NetTopologySuite:

var jsonSeq = File.ReadAllText("fixtures/tile_00000.city.jsonl");

var allLines = jsonSeq.Split('\n');

var firstLine = allLines[0];
var cityJson = JsonConvert.DeserializeObject<CityJsonDocument>(firstLine);
Assert.That(cityJson.Type == "CityJSON");
Assert.That(cityJson.Version == "2.0");

var transform = cityJson.Transform;
            
var secondLine = allLines[1];
var cityJsonSecond = JsonConvert.DeserializeObject<CityJsonDocument>(secondLine);
Assert.That(cityJsonSecond.CityObjects.Count == 2);
var wkt = cityJsonSecond.ToWkt(transform);

// read with NetTopologySuite
var reader = new NetTopologySuite.IO.WKTReader();
var geom = reader.Read(wkt);
Assert.That(geom.GeometryType == "MultiPolygon");

Kown limitations

• Geometry type support: Solid, MultiSurface, CompositeSurface

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

• No support for writing CityJSON files

History

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