Here’s something lovely from strangemaps: 359 – The Euro Invasion of France (2002)
This principle has given rise to a whole new discipline for statisticians to get excited about – euro-coin-analysis, thus observing the flow of money, thereby studying cross-border mobility and ultimately transnational economic ties. An early example of this discipline is this map, drawn up based on data collected in France in the crucial changeover year 2002.
The researchers asked over a million people to show them the change they had on them, counting how many coins were â€˜foreignâ€™ and where those came from (in 1992, the average French person carried 14 coins of change, incidentally). This study was published in the November 2002 issue of Population et SociÃ©tÃ©s, the monthly newsletter of the INED (Institut national dâ€™etudes demographiques) in Paris. This map charts the infiltration of Belgian, German and Spanish coins.