CityJSON Geometry Templates Mapper

CLI application to create CityJSON files from points and a 3D model (OBJ).

Installation

You can install templates_cj by cloning this repository and then running:

pip install .

This will install the package locally from the current directory.

Usage

usage: template_cj [-h] --points POINTS --model MODEL [--save SAVE]
                   [--type {GenericCityObject,CityFurniture,OtherConstruction,Bridge,Building,PlantCover,SolitaryVegetationObject,TransportSquare,WaterBody}]
                   [--crs CRS] [--height HEIGHT] [--global_rotation GLOBAL_ROTATION GLOBAL_ROTATION GLOBAL_ROTATION]
                   [--global_translation GLOBAL_TRANSLATION GLOBAL_TRANSLATION GLOBAL_TRANSLATION]
                   [--global_scale GLOBAL_SCALE GLOBAL_SCALE GLOBAL_SCALE] [--local_rotation_x LOCAL_ROTATION_X]
                   [--local_rotation_y LOCAL_ROTATION_Y] [--local_rotation_z LOCAL_ROTATION_Z]
                   [--local_translation_x LOCAL_TRANSLATION_X] [--local_translation_y LOCAL_TRANSLATION_Y]
                   [--local_translation_z LOCAL_TRANSLATION_Z] [--local_scale LOCAL_SCALE]

Create CityJSON file from points and a 3D model (OBJ)

optional arguments:
  -h, --help            show this help message and exit
  --points POINTS       Path to shapefile containing points
  --model MODEL         Path to 3D model in OBJ format
  --save SAVE           Path to save CityJSON file
  --type {GenericCityObject,CityFurniture,OtherConstruction,Bridge,Building,PlantCover,SolitaryVegetationObject,TransportSquare,WaterBody}
                        Type of the CityObject
  --crs CRS             EPSG code of the coordinate reference system
  --height HEIGHT       Name of the height attribute
  --global_rotation GLOBAL_ROTATION GLOBAL_ROTATION GLOBAL_ROTATION
                        Rotation angles (in degrees) around x, y, and z axes
  --global_translation GLOBAL_TRANSLATION GLOBAL_TRANSLATION GLOBAL_TRANSLATION
                        Translation vector
  --global_scale GLOBAL_SCALE GLOBAL_SCALE GLOBAL_SCALE
                        Scale factor for the coordinates
  --local_rotation_x LOCAL_ROTATION_X
                        Name of the local rotation attribute around x-axis
  --local_rotation_y LOCAL_ROTATION_Y
                        Name of the local rotation attribute around y-axis
  --local_rotation_z LOCAL_ROTATION_Z
                        Name of the local rotation attribute around z-axis
  --local_translation_x LOCAL_TRANSLATION_X
                        Name of the local translation attribute along x-axis
  --local_translation_y LOCAL_TRANSLATION_Y
                        Name of the local translation attribute along y-axis
  --local_translation_z LOCAL_TRANSLATION_Z
                        Name of the local translation attribute along z-axis
  --local_scale LOCAL_SCALE
                        Name of the local scale attribute

Example

To create a CityJSON file using templates_cj, you can use the following command:

template_cj --points points.shp --model model.obj --save output.json

This is the basic command that will create a CityJSON file named output.json using the points from points.shp, the 3D model from model.obj, with default configuration.

template_cj --points points.shp --model model.obj --save output.json --type CityFurniture --crs 4326 --height elevation --rotation 0 90 0 --translation 0 0 0 --scale 1 1 1 --version 1.0

This command will create a CityJSON file named output.json using the points from points.shp, the 3D model from model.obj, as CityFurniture object, with EPSG code 4326, height attribute named elevation, rotation angles of 0 degrees around the x-axis, 90 degrees around the y-axis, 0 degrees around the z-axis, no translation, no scaling, and with version 1.1.

You can also specify a local rotation and translation if you have this data stored in your shapefile.

Author

This software was developped by Anass Yarroudh, Research Engineer at University of Liege. For more detailed information please contact us via ayarroudh@uliege.be, we are pleased to send you the necessary information.

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Copyright © 2023, GeoScITY Lab - ULiège. Released under MIT License.