The Population map is available as a GeoJSON file which you can use with a site such as Flourish to create choropleths such as this.
Download the GeoJSON file here.
To use the map with Flourish:
The GeoJSON format is based on real-world latitude and longitude. These are meaningless for a symbolic representation such as a cartogram. To take advantage of the wide range of tools which use the GeoJSON standard, the cartogram has been passed through the inverse of an equal-area projection in order to create a virtual globe where country areas are proportional to their populations. So, mapping the GeoJSON through any equal-area projection will produce a valid map with the countries still in proportion.
The GeoJSON file is provided under CC BY-NC licencing. You may share and adapt the maps for non-commercial use, provided that you provide attribution to this site and indicate any changes that you have made. Please use the email link if you would like to use the maps commercially.
Use the "email us" link for feedback, questions and suggestions for new variables.