Add support for removing deck layers programmatically

[giswqs]

The Map.remove_layer() method does not work for Deck.GL layers. It would be great to support this.

[crazycapivara]

@giswqs This already works with the Map.set_deck_layers method:

import requests as req
from maplibre.ipywidget import MapWidget, MapOptions
from maplibre.controls import NavigationControl
from maplibre.basemaps import Carto

data = req.get(
    "https://d2ad6b4ur7yvpq.cloudfront.net/naturalearth-3.3.0/ne_10m_airports.geojson"
).json()

deck_geojson_layer = {
    "@@type": "GeoJsonLayer",
    "id": "airports",
    "data": data,
    "filled": True,
    "pointRadiusMinPixels": 2,
    "pointRadiusScale": 2000,
    "getPointRadius": "@@=11 - properties.scalerank",
    "getFillColor": [200, 0, 80, 180],
    "autoHighlight": True,
    "pickable": True,
}

deck_arc_layer = {
    "@@type": "ArcLayer",
    "id": "arcs",
    "data": [
        feature
        for feature in data["features"]
        if feature["properties"]["scalerank"] < 4
    ],
    "getSourcePosition": [-0.4531566, 51.4709959],  # London
    "getTargetPosition": "@@=geometry.coordinates",
    "getSourceColor": [0, 128, 200],
    "getTargetColor": [200, 0, 80],
    "getWidth": 2,
    "pickable": True,
}

m = MapWidget(
    MapOptions(
        style=Carto.POSITRON,
        center=(0.45, 51.47),
        zoom=4,
        hash=True,
        pitch=30,
    ), controls=[NavigationControl()]
)

m.add_deck_layers(
    [deck_geojson_layer, deck_arc_layer],
    tooltip={
        "airports": "{{ &properties.name }}",
        "arcs": "gps_code: {{ properties.gps_code }}",
    },
)

m

Then you can remove or update layers like this:

# Remove arc layer
m.set_deck_layers([deck_geojson_layer], tooltip=dict(airports = "{{ &properties.name }}"))

It is the concept of deck.gl to update the layers property in order to remove layers or update their props.

See also deck.gl-using layers.

[giswqs]

It works like a charm! Thanks for providing the examples.