In 1826 mathematician, engineer, economist and French politician Baron Charles Dupin invented the "Carte tintée", a type of thematic map where the regions are colored or filled with a pattern that shows a "statistical measure, such as population density or income by inhabitant." Dupin first applied this map in 1826 in a map entitled Carte figurative de l'instruction populaire de la France. He published it the following year in his book Forces productives et commerciales de la France.
