This visualization is a choropleth map of France showing influenza rates across regions for each week. It displays the data through a slider interface that lets viewers step through the weeks, with regions colored on a quantized scale from light to dark. The map is rendered using `d3.geo.conicConformal()` projection and `d3.geo.path()` for the geographic shapes, while the slider uses the `input` event to trigger updates. Data comes from the `GrippeFrance2014.csv` file and the `carteFrance.json` GeoJSON file, which are loaded asynchronously using the `queue()` function.