Today’s visualization relies on data compiled by CityLab researchers to identify the world’s largest megaregions. The team defines megaregions as:
- Areas of continuous light, based on the latest night satellite imagery
- Capturing metro areas or networks of metro areas, with a combined population of 5 million or higher
- Generating economic output (GDP) of over $300 billion, on a PPP basis
Source: https://www.visualcapitalist.com/ranked-the-megaregions-driving-the-global-economy/
