This map of Sweden displays all county boundaries as filled gold polygons with light gray strokes, using a Mercator projection fitted to the country’s extent. Built with React and D3 v5, it loads TopoJSON from a GitHub gist, converts it with the `topojson` library’s `feature` and `mesh` functions, and renders the result as SVG via `d3.geoPath`. Interior boundaries between counties appear as blue lines, while a projected sphere is not shown, though the stylesheet defines a fill for it.