Gist b15a0719d472a2a011176c8a2677efb8
A choropleth map of metropolitan France shows cumulative influenza cases per region for November 2014, using a five-step green color scale applied to regional polygons. The visualization loads CSV data with weekly case counts per region and a GeoJSON file of French regions, merging them by regional name to calculate the November total. Built with D3 v3, it uses `d3.csv`, `d3.json`, `d3.geo.path` with a conic conformal projection, and `d3.scale.quantize` for color mapping, with hover tooltips displaying region names.
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