Airport Markers

import sys

import pandas as pd
from maplibre import (
    Layer,
    LayerType,
    Map,
    MapOptions,
    output_maplibregl,
    render_maplibregl,
)
from maplibre.basemaps import Carto
from maplibre.controls import (
    Marker,
    MarkerOptions,
    NavigationControl,
    Popup,
    PopupOptions,
)
from maplibre.sources import GeoJSONSource
from maplibre.utils import GeometryType, df_to_geojson
from shiny import App, ui

BOUNDS = (-8.92242886, 43.30508298, 13.76496714, 59.87668996)

airports_data = pd.read_json(
    "https://github.com/visgl/deck.gl-data/raw/master/examples/line/airports.json"
)


def get_color(airport_type: str) -> str:
    color = "darkblue"
    if airport_type == "mid":
        color = "darkred"
    elif airport_type == "major":
        color = "darkgreen"

    return color


geojson = df_to_geojson(
    airports_data,
    "coordinates",
    GeometryType.POINT,
    properties=["type", "name", "abbrev"],
)

airport_circles = Layer(
    type=LayerType.CIRCLE,
    source=GeoJSONSource(data=geojson),
    paint={
        "circle-color": [
            "match",
            ["get", "type"],
            "mid",
            "darkred",
            "major",
            "darkgreen",
            "darkblue",
        ],
        "circle_radius": 10,
        "circle-opacity": 0.3,
    },
)

map_options = MapOptions(
    style=Carto.POSITRON,
    bounds=BOUNDS,
    fit_bounds_options={"padding": 20},
    hash=True,
)

popup_options = PopupOptions(close_button=False)


def create_map() -> Map:
    m = Map(map_options)
    m.add_control(NavigationControl())
    m.add_layer(airport_circles)
    for _, r in airports_data.iterrows():
        marker = Marker(
            lng_lat=r["coordinates"],
            options=MarkerOptions(color=get_color(r["type"])),
            popup=Popup(
                text=r["name"],
                options=popup_options,
            ),
        )
        m.add_marker(marker)
    return m


app_ui = ui.page_fluid(
    ui.panel_title("Airports"),
    output_maplibregl("maplibre", height=600),
)


def server(input, output, session):
    @render_maplibregl
    def maplibre():
        return create_map()


app = App(app_ui, server)

if __name__ == "__main__":
    if len(sys.argv) == 2:
        with open(sys.argv[1], "w") as f:
            f.write(create_map().to_html())
    else:
        app.run()

Run example:

poetry run uvicorn docs.examples.airports.app:app --reload