CityJSON File Format | Convert and Integrate 3D City Models

Overlay DWG drawing entities on top of public satellite imagery provided by Open Street Map, Map Quest, Open Aerial, or any user defined WMS / WTS base layers.

Autoshaper

Convert mesh to NURBS and import / export 3D file formats with NURBS solid shapes including STEP (Standardized Exchange of Product), 3DM (Rhino), IGES, and BREP, with automatic NURBS surface reconstruction.

Autoconverter

Import, export, and convert many 3D mesh and solid file formats including STL (Stereo-Lithography), SKP (SketchUp), OBJ (Wavefront), FBX (Filmbox), STEP (Standardized Exchange), and others.

Automesher Application

Convert polyface mesh to solid and import / export many 3D mesh and solid file formats including STL (Stereo-Lithography), SKP (Trimble SketchUp), OBJ (Wavefront), 3DM (Rhino), and others.

JSON CityJSON (3D City Model) File

The CityJSON file format is a modern, JSON-based (JavaScript Object Notation) standard designed for storing and exchanging 3D city models. It efficiently encodes buildings, roads, bridges, urban furniture, and other city objects, offering strong support for textures, semantics, and detailed metadata. CityJSON is a lightweight alternative to CityGML, optimized for simplicity, web integration, and high-performance applications.

Key Features of CityJSON Files

JSON Simplicity: CityJSON files are lightweight, human-readable, and easily parsed by common programming languages, avoiding the complexity of XML structures like in CityGML.
Semantic Data: Preserves rich metadata, including building heights, roof shapes, material classifications, and road types, enhancing 3D GIS and urban analysis.
LOD (Level of Detail) Support: Manages multiple levels of detail (LOD1 through LOD4) to suit diverse visualization, simulation, and analysis needs.
Web-Friendly Format: Perfect for 3D web visualization and integration with JavaScript libraries like Cesium and Three.js.
Open and Extensible: Developed by the 3D Geoinformation Group (Delft University of Technology), CityJSON is an open standard that promotes interoperability and innovation.
File Extension Note: Both CityJSON and GeoJSON use the .json extension - ensure you verify the file structure before processing to avoid errors.

CityJSON File Conversion Made Easy

With Autoconverter and Automesher Application, you can seamlessly import, export, and convert CityJSON files into formats like STL, OBJ, SKP (SketchUp), and 3DS. Our tools preserve geometric precision and semantic information, making it easy to integrate 3D city models into your CAD, GIS, and 3D visualization workflows.

Streamline Your 3D City Modeling Today

Optimize your urban planning, GIS projects, and 3D web applications with powerful CityJSON file conversion. Try Autoconverter and Automesher Application now and unlock the full potential of CityJSON in your workflows!