This example visualizes a map of the United States, rendering individual state boundaries as green paths with dark strokes on a light blue SVG canvas. It uses the D3 v4 library with `d3.geoPath` and the `d3.geoAlbersUsa` projection to draw the map, while `topojson-client` converts TopoJSON data from the us-atlas dataset into GeoJSON features. The SVG is styled with a custom background color and positioned within a React-free HTML page, with margins and transform attributes controlling the layout.