{"version":"1.0","type":"rich","title":"The map of soldier data visualization in war - Napoleon's Russian campaign","description":"This D3.js v7 visualization recreates Charles Minard's 1869 flow map of Napoleon's 1812 Russian campaign, showing troop strength through the changing width of a path as the army advances and retreats. Geographic context is provided by city markers, river lines, and a temperature chart tracking the frigid retreat. The code uses `d3.group` to organize troop data by army group and direction, `d3.area` with a Catmull-Rom curve to render the tapering flow paths, and `d3.axisLeft` for the temperature scale. Tooltips on hover reveal the number of survivors at each position.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/f55fc6a4c4ea4401a81f58bcd578865e?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}