What is CZML?

From the official CZML Guide:

CZML is a JSON format for describing a time-dynamic graphical scene, primarily for display in a web browser running Cesium. It describes lines, points, billboards, models, and other graphical primitives, and specifies how they change with time. While Cesium has a rich client-side API, CZML allows it to be data-driven so that a generic Cesium viewer can display a rich scene without the need for any custom code.

Installation

You can install czmlpy using pip:

$ pip install czmlpy

or conda:

$ conda install czmlpy --channel conda-forge

czmlpy requires Python >= 3.7.

Examples

A CZML document is a list of packets, which have several properties. When using czmlpy in an interactive interpreter, all objects show as nice CZML (JSON):

>>> from czmlpy import Packet
>>> print(Packet())
{
    "id": "adae4d3a-7087-4fda-a70b-d18a262a890e"
}
>>> packet0 = Packet(id="Facility/AGI", name="AGI")
>>> print(packet0)
{
    "id": "Facility/AGI",
    "name": "AGI"
}
>>> packet0.dumps()
'{"id": "Facility/AGI", "name": "AGI"}'

And there are more complex examples available:

>>> from czmlpy.examples import simple
>>> print(simple)
[
    {
        "id": "document",
        "version": "1.0",
        "name": "simple",
        "clock": {
            "interval": "2012-03-15T10:00:00Z/2012-03-16T10:00:00Z",
            "currentTime": "2012-03-15T10:00:00Z",
            "multiplier": 60,
            "range": "LOOP_STOP",
            "step": "SYSTEM_CLOCK_MULTIPLIER"
        }
    },
...

Jupyter widget

You can easily display your CZML document using our interactive widget:

In [1]: from czmlpy.examples import simple

In [2]: from czmlpy.widget import CZMLWidget

In [3]: CZMLWidget(simple)

And this would be the result:

Support

If you find any issue on czmlpy or have questions, please open an issue on our repository

Contributing

You want to contribute? Awesome! There are lots of CZML properties that we still did not implement. Also, it would be great to have better validation, a Cesium widget in Jupyter notebook and JupyterLab… Ideas welcome!

We recommend this GitHub workflow to fork the repository. To run the tests, use tox:

$ tox

Before you send us a pull request, remember to reformat all the code:

$ tox -e reformat

This will apply black, isort, and lots of love ❤️

To build a wheel file, update version in setup.py and __init__.py, then:

$ python setup.py sdist bdist_wheel
$ twine upload --repository testpypi dist/*

License

czmlpy is released under the MIT license, hence allowing commercial use of the library. Please refer to the LICENSE file.