Drop shadow and glow

box_shadow and glow apply to the main map, either with the default settings (True) or through a dict (dx, dy, blur, color, opacity). Here an outer glow on a dark background, over a European basemap.

from mappyng import Map, BasemapLayer, VectorLayer
from mappyng.data import load_france_departments, load_europe

europe = load_europe().to_crs(2154)
deps = load_france_departments().to_crs(2154)

bbox_metro = [90000, 6040000, 1280000, 7150000]
cartouches = {
    0: {"bbox": [-6890454, 1780151, -6799589, 1874186], "crs": 3857,
        "cartouche_title": "Guadeloupe", "cartouche_title_size": 7,
        "border_radius": 6, "glow": {"blur": 8, "color": "#4cc9f0"}},
    1: {"bbox": [-6826862, 1609607, -6759494, 1685367], "crs": 3857,
        "cartouche_title": "Martinique", "cartouche_title_size": 7,
        "border_radius": 6, "glow": {"blur": 8, "color": "#4cc9f0"}},
    2: {"bbox": [-6136680, 235261, -5707791, 671780], "crs": 3857,
        "cartouche_title": "French Guiana", "cartouche_title_size": 7,
        "border_radius": 6, "glow": {"blur": 8, "color": "#4cc9f0"}},
    3: {"bbox": [6136383, -2448160, 6226316, -2366992], "crs": 3857,
        "cartouche_title": "Reunion", "cartouche_title_size": 7,
        "border_radius": 6, "glow": {"blur": 8, "color": "#4cc9f0"}},
    4: {"bbox": [5006226, -1459183, 5050208, -1416184], "crs": 3857,
        "cartouche_title": "Mayotte", "cartouche_title_size": 7,
        "border_radius": 6, "glow": {"blur": 8, "color": "#4cc9f0"}},
}

m = Map(
    europe,
    bbox=bbox_metro,
    width=900,
    height=1000,
    padding=25,
    style={"base": "classic", "title_color": "#e0e1dd"},
    facecolor="#16324a",
    background="#0d1b2a",
    border_radius=10,
    glow={"blur": 14, "color": "#4cc9f0", "opacity": 0.7},
    cartouche_params=cartouches, cartouche_spacing=15,
)
m.add(BasemapLayer())
m.add_shadow(europe, {"query": "code_pays_iso3=='FRA'", "on_cartouches": True})
m.add(VectorLayer(deps, stroke="#4cc9f0", stroke_width=0.2, on_cartouches=True))
m.title("Outer glow on a dark background")