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Last edited Feb 9, 2018

Created on Feb 2, 2018

A choropleth of mainland France colors each region by the total number of influenza cases recorded in 2014, with a linear white-to-red scale mapping the summed yearly values. The visualization loads the regional GeoJSON and CSV data, joins them on the region name, and uses the `d3.geoConicConformal` projection with `d3.geoPath` to render the paths. Each polygon’s fill is set via `d3.scaleLinear`, illustrating the geographic distribution of the disease’s annual incidence.

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