IFC is the BIM standard for building design, CityJSON is a format for 3D city models. IFC for individual buildings, CityJSON for whole districts.
| Criteria | IFC | CityJSON |
|---|---|---|
| Building detail | ✓ | ✗ |
| City scale | ✗ | ✓ |
| BIM compatibility | ✓ | ✗ |
| File size | Large | Compact (JSON) |
| Web visualization | ✗ | ✓ |
For BIM design, Revit/ArchiCAD, construction documentation.
For 3D city models, smart city, district visualization.