The map above shows whether your country has more immigrants (people born abroad who live there now) or emigrants (people born in the country but now living in another one).
It also is using absolute numbers rather than any kind of normalized scale. If a country of 5 billion people has a million leave that’s not exactly the same thing as a country with a population of 10 million having a million leave. A lot of these sorts of things suffer from this problem where the maps end up matching very closely to maps of population density.
It also is using absolute numbers rather than any kind of normalized scale. If a country of 5 billion people has a million leave that’s not exactly the same thing as a country with a population of 10 million having a million leave. A lot of these sorts of things suffer from this problem where the maps end up matching very closely to maps of population density.
The coloring is solely based on which number is higher for each country, that doesn’t change if you use relative numbers.