Smoothing

The level of smoothing of the geometry can be determined by passing smooth_factor as an argument when initialising GeoJson, TopoJson and Choropleth objects. There are no upper or lower bounds to the smoothing level; Leaflet’s default is 1.

import requests

m = folium.Map(location=[-59.1759, -11.6016], tiles="cartodbpositron", zoom_start=2)

topo = requests.get(
    "https://raw.githubusercontent.com/python-visualization/folium-example-data/main/antarctic_ice_shelf_topo.json"
).json()

folium.TopoJson(
    data=topo,
    object_path="objects.antarctic_ice_shelf",
    name="default_smoothing",
    smooth_factor=1,
    style_function=lambda x: {"color": "#004c00", "opacity": "0.7"},
).add_to(m)


folium.TopoJson(
    data=topo,
    object_path="objects.antarctic_ice_shelf",
    name="heavier smoothing",
    smooth_factor=10,
    style_function=lambda x: {"color": "#1d3060", "opacity": "0.7"},
).add_to(m)

folium.LayerControl().add_to(m)

m

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