This choropleth-style map of Sweden visualizes the country’s counties (län) as filled purple polygons with pink internal borders, projected using the Mercator projection via d3.geoMercator and rendered with d3.geoPath. The React component loads TopoJSON data from a GitHub gist using d3.json and converts it into GeoJSON features and an interior mesh via topojson.feature and topojson.mesh. The SVG output is styled with CSS classes for landmass, borders, and interiors, with the projection automatically fitted to the viewport using fitExtent.