I am using Anaconda (Python3.7) on Windows and mapwidget 0.1.2. I can use it with Mapbox but with CESIUM I get the following error: TraitError: The 'token' trait of a Map instance expected a unicode string, not the NoneType None.

I basically followed your tutorial and set os.environ['CESIUM_TOKEN'] to my newly generated token.

With

m = mapwidget.Map(center=[37.655, -122.4175], altitude=400, height='600px')
m

The result is :

KeyError Traceback (most recent call last)

/usr/local/lib/python3.9/dist-packages/traitlets/traitlets.py in get(self, obj, cls)
652 try:
--> 653 value = obj._trait_values[self.name]
654 except KeyError:

KeyError: 'token'

During handling of the above exception, another exception occurred:

TraitError Traceback (most recent call last)

9 frames

/usr/local/lib/python3.9/dist-packages/traitlets/traitlets.py in error(self, obj, value, error, info)
839 describe("the", value),
840 )
--> 841 raise TraitError(e)
842
843 def get_metadata(self, key, default=None):

TraitError: The 'token' trait of a Map instance expected a unicode string, not the NoneType None.

• Mapbox: https://docs.mapbox.com/mapbox-gl-js/example/map-tiles/
• MapLibre: https://maplibre.org/maplibre-gl-js-docs/example/map-tiles
• Cesium: CesiumGS/cesium-unreal#863

https://github.com/tangrams/tangram

• MapLibre: https://maplibre.org/maplibre-gl-js-docs/example/geojson-polygon/
• Mapbox: https://docs.mapbox.com/mapbox-gl-js/example/external-geojson/
• Cesium: https://cesium.com/learn/cesiumjs/ref-doc/GeoJsonDataSource.html

It is unclear to me which package is responsible for this error. So I've crossposted to

• bokeh/ipywidgets_bokeh#88

Environment Information

• mapwidget version: 0.1.2
• Python version: 3.9
• Operating System: Windows

Description

I would like to use Panel with mapwidget.cesium. Panel works with (some) ipywidgets via ipywidgets-bokeh.

Exception

Class null not found in module @jupyter-widgets/[email protected]      ipywidgets_bokeh.js?v=59296d23d623ce0adf7675d22156e83b1248c8508135a65dd8a9e38c497e94a8:8 

Reproducible Example

pip install panel==0.14.1 ipywidgets-bokeh==1.3.0 mapwidget==0.1.2

Other versions: ipywidgets-8.0.5 jupyterlab-widgets-3.0.6 widgetsnbextension-4.0.6 anywidget-0.2.0

mapwidget_app.py

import os
import mapwidget.cesium as mapwidget
import panel as pn

pn.extension("ipywidgets")

try:
    token = os.environ['CESIUM_TOKEN']
except KeyError as ex:
    raise EnvironmentError(
        "CESIUM_TOKEN environment variable not set. "
        "Sign up for free and get a free Cesium token here https://ion.cesium.com/signup/"
        ) from ex

cesium_map = mapwidget.Map(center=[40.70605, -74.01177], altitude=600, height='600px', token=token)
pn.panel(cesium_map).servable()

panel serve mapwidget_app.py

Open: http://localhost:5006/mapwidget_app and see the exception in the browsers console.

Is there a way to support adding PMTiles to MapWidget MapLibre maps?

PMTiles are an open-source solution for single-file archive format for tiled data:

A PMTiles archive can be hosted on a commodity storage platform such as S3, and enables low-cost, zero-maintenance map applications that are "serverless" - free of a custom tile backend or third party provider.

See https://github.com/protomaps/PMTiles and https://protomaps.com/docs/pmtiles

For use in MapLibre, it apparently needs an additional JS plugin (see https://protomaps.com/docs/frontends/maplibre -- "For reading PMTiles directly from cloud storage, you'll need the pmtiles JavaScript library."

Environment Information

• mapwidget version: "^0.1.2"
• Python version: 3.10.12
• Operating System: macOS Version 13.5 (22G74) (on M1), Firefox 116.0.3 (64-bit)

Description

On repeating basic Leaflet map example (https://mapwidget.gishub.org/examples/leaflet/)
I receive a 'Error displaying widget' after attempting to display map

What I Did

On inspection of the Web Console, errors are populated regarding Error: Could not create a view for model id, or TypeError: class constructors must be invoked with 'new'
See screenshot: