Here is another image I made with processing (and pixelmator). The x-axis is population density. The y-axis is GDP per capita. The bottom left holds the low values. The colour of each circle is determined by the country’s Polity IV score (democracy score). Blue is more democratic and red is more authoritarian. The size of each circle is determined by the size of the country’s population.
The inlay blows up the chaos of the bottom left corner and scales down the radius of the circles to improve visibility. The sizes and placement of the circles within the inlay are correct relative to each other.
Click the image to download the much larger version (2000x2000 px).
