Last Updated on March 27, 2023 by mishou

I. What shall we learn?

Let’s learn how to create a world map with markeres with Folium like this:

We can see the scripts here:

Map with markers with Python and Folium

We can learn the differences among Altir, Plotly, and Folium here:

Interactive Choropleth Maps in Python Using Altair, Plotly, and Folium

II.Scripts

The scripts in the first link convert all the data to objects and might get an error when you create a map. You should remove “,dtype=str” from the scripts in this case, though there must some reason for the conversions.

# import libraries
# import libraries
import pandas as pd
import folium
# create a data frame
data = pd.DataFrame({
   'lon': [-58, 2, 145, 30.32, 30.31, -4.03, -73.57, 36.82, -38.5],
   'lat': [-34, 49, -38, 59.93, 50.27, 5.33, 45.52, -1.29, -12.97],
   'name': ['Buenos Aires', 'Paris', 'Melbourne', 'St_Petersbourg', 'Kyiv', 'Abidjan', 'Montreal', 'Nairobi', 'Salvador'],
   'population': [2891082, 2165423, 5159211, 5351935, 2962180, 3677115, 1762949, 4397073, 2886698],
   'url':['https://en.wikipedia.org/wiki/Buenos_Aires',
          'https://en.wikipedia.org/wiki/Paris',
          'https://en.wikipedia.org/wiki/Melbourne',
          'https://en.wikipedia.org/wiki/Saint_Petersburg',
          'https://en.wikipedia.org/wiki/Kyiv',
          'https://en.wikipedia.org/wiki/Abidjan',
          'https://en.wikipedia.org/wiki/Montreal',
          'https://en.wikipedia.org/wiki/Nairobi',
          'https://en.wikipedia.org/wiki/Salvador,_Bahia'
          ]
          })
data

You can put variables on Pop-up texts and I have inserted the population of each city and the URL of the page of each city on Wikipedia.

# create an empty map
n = folium.Map(location=[20,0], tiles="OpenStreetMap", zoom_start=2)
# add markers
for i in range(0,len(data)):
    html=f"""
        <h1> {data.iloc[i]['name']}</h1>
        <p>You can use any html here! Let's do a list:</p>
        <ul>
            <li>Population {data.iloc[i]['population']}</li>
            <li>Item 2</li>
        </ul>
        </p>
        <p>And that's a <a href="https://en.wikipedia.org/wiki/Kyiv">link</a></p> # should be changed
        """
    iframe = folium.IFrame(html=html, width=200, height=200)
    popup = folium.Popup(iframe, max_width=2650)
    folium.Marker(
        location=[data.iloc[i]['lat'], data.iloc[i]['lon']],
        popup=popup,
        icon=folium.DivIcon(html=f"""
            <div><svg>
                <circle cx="50" cy="50" r="40" fill="#69b3a2" opacity=".4"/>
                <rect x="35", y="35" width="30" height="30", fill="red", opacity=".3" 
            </svg></div>""")
    ).add_to(n)

# Show the map again
n

You can see the scripts on Google Colaboratory here:

https://colab.research.google.com/drive/17CaURvPdPt6npzsmV9Fz9YZzzkDNb3n_?usp=sharing