A choropleth map of France displays cumulative COVID-19 hospitalizations per department, with a white-to-dark-red color scale using a power exponent to emphasize high totals. The visualization uses d3.geoMercator and d3.geoPath to project and draw geographic features from a JSON topology, while d3.scalePow maps the data domain to the color range. Department totals are loaded from a CSV file via d3.csv, and each path includes a title tooltip showing the department name and its value.