General graphic summary of the Statistical Atlas of the population of Paris. It is one of the first graphical representation of data in the form of aheat map.[1]
Toussaint Loua (1824 – 1907) was a French statistician and was credited for inventing theheat map in information visualization.[1][2]
He began his career as a clerk at theMinistry of Commerce in 1850 at the age of 26. From 1875 to 1887, Loua directed the General Directorate of Statistics of France (French:Statistique générale de la France). Under his direction, the SGF published in 1878 the first Statistical Yearbook of France (French:Annuaire statistique de la France) and it was also under its mandate that in 1885 the High Council of Statistics was created.[4][2]
