Charles Dupin
Baron Pierre Charles François Dupin (French pronunciation: [pjɛʁ ʃaʁl fʁɑ̃swa dypɛ̃]; 6 October 1784, Varzy, Nièvre – 18 January 1873, Paris, France) was a French Catholic mathematician, engineer, economist[1] and politician, particularly known for work in the field of mathematics, where the Dupin cyclide and Dupin indicatrix are named after him; and for his work in the field of statistical and thematic mapping.[2] In 1826 he created the earliest known choropleth map.[3]
Pierre Charles François Dupin
6 October 1784
Varzy, France
18 January 1873 (aged 88)
Paris, France
