map_script.py

import folium
import pandas
import json

df=pandas.read_csv("Volcanoes_USA.txt")
map=folium.Map(location=[df['LAT'].mean(),df['LON'].mean()],zoom_start=4,tiles='Stamen Terrain')
fg=folium.FeatureGroup(name="Volcano Locations") 

def color(elev):
    minimum=int(min(df['ELEV']))
    step=int((max(df['ELEV'])-min(df['ELEV']))/3)
    if elev in range(minimum,step):
        col='green'
    elif elev in range(minimum+step,minimum+step*2):
        col='orange'
    else:
        col='red'
    return col


for lat,lon,name,elev in zip(df['LAT'],df['LON'],df['NAME'],df['ELEV']):
        fg.add_child(folium.Marker([lat,lon],popup=name,icon=folium.Icon(color=color(elev))))
              
map.add_child(fg)

map.add_child(folium.GeoJson(json.load(open('worldpopulation.json')),
name='World Population',
style_function=lambda x: {'fillColor':'green' if x['properties']['POP2005']<=10000000 else 'orange' if x['properties']['POP2005']<20000000 else 'red'}))

map.add_child(folium.LayerControl())

map.save(outfile='map.html')