ArcLayer

The deck.gl ArcLayer draws great-circle or straight arcs between pairs of coordinates. Use it to visualize connections such as flights or telecommunication routes. The accessor props mirror deck.gl’s API—get_source_position and get_target_position accept column names when prefixed with @@=.

from ipydeck import Deck, Layer, ViewState

flights = Layer(
    type="ArcLayer",
    data=[
        {
            "start": [-122.389977, 37.618972],  # SFO
            "end": [-73.778139, 40.641311],     # JFK
        },
        {
            "start": [-118.40853, 33.94159],    # LAX
            "end": [-87.9048, 41.9742],         # ORD
        },
    ],
    get_source_position="@@=start",
    get_target_position="@@=end",
    get_source_color=[0, 92, 191],
    get_target_color=[255, 89, 94],
    get_width=4,
    great_circle=True,
)

Deck(
    layers=[flights],
    initial_view_state=ViewState(latitude=39, longitude=-98, zoom=3.3),
)

For dense datasets consider supplying a Pandas DataFrame or GeoPandas geometry; ipydeck.Layer will normalize it before serialization.