This example visualizes U.S. state boundaries using D3 v4’s geoAlbersUsa projection and d3.geoPath to render geographic features from a local us-states.json file. The SVG canvas, sized 700x580, is appended to the body, and each state’s polygon is drawn as a path element with a default fill and stroke. The map is centered using a translate of [width/2, height/2], and the simple code demonstrates how to load and project GeoJSON data for display. No interactions or styling are applied, keeping the focus on the map layout.