This example visualizes projected median age data for select African countries and territories from 2015 to 2100, using a choropleth map. Countries are colored according to their median age for a selected year, with a hover tooltip revealing the exact value and a legend showing the color scale. The data is loaded from a JSON file and rendered using the datamaps library, with an animation control (play button) that steps through the time series, smoothly updating the map’s color encoding. The map highlights demographic trends and regional contrasts, such as the rapid aging projected in Mauritius versus the much younger populations in countries like Burundi and Mozambique, providing a clear spatial overview of changing age structures across the dataset.