This example displays a world map rendered as violet countries with black outlines on a green background, using geographic data from the World Atlas TopoJSON file. It isolates the United States of America from the full country feature collection while drawing all countries via d3.geoPath with the d3.geoAlbersUsa projection. The visualization filters features by name property and appends SVG path elements for each country, demonstrating map generation with topojson.feature and D3’s v5 API.