Last week, the Swiss people narrowly rejected the principle of freedom of movement. This principles serves as one of the foundations of the European Union. And while Switzerland does not belong to the EU, its economy benefits from access to the single market via that freedom of movement principle. That may be an oversimplification perhaps, but it provides some context to the consternation in Europe over the Swiss people rejecting the principle.
This graphic is not particularly complex. It is a choropleth of the vote results. However, it does show that the vote was not unanimous. Rather it was contained to the cantons (analogous to states in the US) more rural in character, i.e. less urban places like Geneva.
Credit for the piece goes to the BBC graphics department.