Gist 7a670ce28de4fb296ed54dbff24bed19
A choropleth map of French regions colors each region by the sum of flu cases reported over five weeks in November 2014, using a green sequential scale from gray to dark green. It loads region boundaries from a GeoJSON file and joins them with CSV data containing weekly case counts per region. D3 v3’s `d3.geo.conicConformal` projection and `d3.geo.path` render the map, while a quantize color scale maps values to five color bins. Hovering over a region displays its name and total case count in a tooltip.
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