A choropleth map of France displays the average incidence of influenza cases across administrative regions for November 2014, using a green color scale from light to dark to indicate increasing case counts. The visualization uses the D3.js v4 library with a `geoConicConformal` projection to render the map. It merges influenza case data from a CSV file with geographic shapes from a GeoJSON file, calculating a five-week average for each region to determine the choropleth color. Hovering over a region triggers a tooltip that shows the region's name and its computed value.