This example displays a monochrome vector map of Europe, rendered as individual SVG paths with grey strokes and white fills. It uses a Mercator projection centered on the continent, with D3’s `d3.geoPath` and `d3.geoMercator` to transform GeoJSON features into drawing commands. The map is built with React and D3 v5, fetching geographic data from a remote GeoJSON URL via `d3.json`.