CityJSON

This community standard is a data exchange format for digital 3D models of cities and landscapes. The JSON-based encoding of CityJSON implements a subset of the CityGML data model (version 3.0) and includes a JSON-specific extension mechanism. Using JSON instead of GML allows us to compress files by a factor 6 and at the same time to simplify greatly the structure of the files.

Documents

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Document title	Version	OGC Doc No.	Type
CityJSON Community Standard 2.0	2.0.0	20-072r5	CS

Official model files and encoding schemas

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Overview

CityJSON is a data exchange format for digital 3D models of cities and landscapes. It aims at being easy-to-use (for reading, processing, and creating datasets), and it was designed with programmers in mind, so that tools and APIs supporting it can be quickly built. The JSON-based encoding of CityJSON implements a subset of the OGC CityGML data model (version 3.0) and includes a JSON-specific extension mechanism. Using JSON instead of GML allows us to compress files by a factor 6 and at the same time to simplify greatly the structure of the files.