These maps show the population percentage and the total number of slaves for 162 countries in 2013 based on data from the Global Slavery Index. According to their definition
the significant characteristic of all forms of modern slavery is that it involves one person depriving another people of their freedom: their freedom to leave one job for another, their freedom to leave one workplace for another, their freedom to control their own body.
You can see the data value for an individual geographic unit (e .g. country, state, county) by moving the mouse over it.
You can zoom in by clicking on a unit and zoom out by clicking on the same unit or any point on the map outside of units.
Click on the button in the top menu to see the IPython notebook with the code to retrieve and process the data.
Click on the button to download the currently displayed map as a PNG image.
If you see in the top menu you can choose a color scheme from the drop down displayed on click.
If there is a menu item named
Choose Dataset on the left in the top menu, you can choose different data series to display on the map from that drop down.