map.py

import folium
import pandas

data = pandas.read_csv("Volcanoes_USA.txt")
lat = list(data["LAT"])
lon = list(data["LON"])
elev = list(data["ELEV"])

def color_producer(elevation) :
    if elevation < 1500 :
        return "green"
    elif elevation < 3000 :
        return "orange"
    else :
        return "red"

map = folium.Map(location = [38.58, -99.89], zoom_start = 6, tiles = "Mapbox Bright")

fgv = folium.FeatureGroup(name = "Volcanoes_USA")

for lt, ln, el in zip(lat, lon, elev) :
    fgv.add_child(folium.CircleMarker(location = [lt, ln], radius = 6 , popup = folium.Popup(str(el) + " m", parse_html = True), fill_color = color_producer(el), color = "grey", fill_opacity = 0.7, fill = True))

fgp = folium.FeatureGroup(name = "Population")

fgp.add_child(folium.GeoJson(data = open('world.json', 'r', encoding = 'utf-8-sig').read(), style_function = lambda x : {'fillColor' : 'green' if x['properties']['POP2005'] < 10000000 else 'orange' if 10000000 <= x['properties']['POP2005'] < 20000000 else 'red'}))

map.add_child(fgv)
map.add_child(fgp)
map.add_child(folium.LayerControl())

map.save("Map1.html")