- #TodayinHistory #dataviz #Onthisday #OTD 📊📊 💀Feb 1, 1839 Charles Lallemand died in Bussy, Haute-Marne, France 🇫🇷 1883: Combination of many variables into multi-function nomograms, using 3D, juxtaposition of maps, parallel coordinate and hexagonal grids [Incredible design] Details: bit.ly/3HuHt9KFeb 2, 2026 03:00
- Lallemand was also responsible for mapping of altitude over all of France -- the Nivellement Général de la France in 1878. Throughout France, you'll still find small brass disks recording the altitude, measured in those times.
