Instead of mapping physical geography, though, this map charts where in the world people are moving to and from, to give us a snapshot look at the worldwide migration patterns over 20 years.
Researchers used data published by the UN collected through a mixture of surveys and census. Then, they ran that data through software intended for use in creating genetics visualizations.
[A]lthough the number of migrants changed throughout the years, researchers found that the percentage of migration worldwide has remained relatively constant since 1990 at around 0.6% of the world’s total population.
Map by Wittgenstein Centre for Demography and Global Human Capital. Make sure to click on the map for the full-sized version, or Global Migration for an online interactive version.
Quoted text via io9.