CityJSON Extension Builder

Create CityJSON Extension files for CityJSON 2.0, not all cases are supported but it's a good starting point.

Extension Metadata

Extension Name

Version

URI (where the extension will be hosted)

Description

Extra Root Properties Case 1

Add new properties at the root level of a CityJSON file. Names must start with "+".

Extra Attributes for CityObjects Case 2

Add extra attributes to existing CityObject types (Building, Road, etc.). Attribute names must start with "+".

Extra Semantic Surfaces Case 3

Define new semantic surface types (like RoofSurface, WallSurface). Names must start with "+".

Extra CityObjects Case 4

Define entirely new CityObject types. Names must start with "+".

Click "Preview JSON" to see the generated Extension file.