IfcCityJSON¶

IfcCityJSON is a converter for CityJSON files and IFC. It currently only supports one-way conversion from CityJSON to IFC.

PyPI¶

pip install ifccityjson

Source installation¶

Install IfcOpenShell
Clone the source code.
cd /path/to/IfcOpenShell/src/ifccityjson
pip install .

Usage¶

An extended ifccityjson tutorial can be found on the OSARCH wiki. Here’s the built-in documentation:

$ python -m ifccityjson -h

usage: __main__.py [-h] -i INPUT [-o OUTPUT] [-n NAME] [--split-lod] [--no-split-lod] [--lod LOD]

options:
  -h, --help            show this help message and exit
  -i INPUT, --input INPUT
                        input CityJSON file
  -o OUTPUT, --output OUTPUT
                        output IFC file. Standard is output.ifc
  -n NAME, --name NAME  Attribute containing the name
  --split-lod           Split the file in multiple LoDs
  --no-split-lod        Do not split the file in multiple LoDs
  --lod LOD             extract LOD value (example: 1.2)

The example file that could be used is example/3D_BAG_example.json

python ifccityjson.py -i example/geometries.json -o output.ifc -n identificatie

The following geometries are implemented:

[x] “MultiPoint”
[x] “MultiLineString”
[x] “MultiSurface”
[x] “CompositeSurface”
[x] “Solid”: exterior shell
[ ] “Solid”: interior shell
[x] “MultiSolid”
[x] “CompositeSolid”
[ ] “GeometryInstance”

TODO:

[x] CityJSON Attributes as IFC properties in ‘CityJSON_attributes’ pset
[x] Implement georeferencing
[x] Do not use template IFC for new IFC file, but make IFC file from scratch
[x] Create mapping to IFC for all CityJSON object types & semantic surfaces
[ ] Implement conversion of all CitYJSON geometries
[x] Implement conversion of all LODs instead of only the most detailed