This example renders a choropleth-style map of the United States, showing state boundaries as green polygons on a light blue background. It uses d3.geoPath with a d3.geoAlbersUsa projection to draw the map, and topojson-client’s topojson.feature to extract state geometries from the us-atlas states-10m dataset. The SVG output is positioned with margins and styled entirely via embedded D3 attributes, with no interactive or hover behavior.