This fork of the classic D3.js face demo renders a world map using SVG paths instead of a smiley face. The map displays country boundaries as gray shapes with light gray strokes, projected using a Mercator projection. The code loads TopoJSON data from the world-atlas package and converts it to GeoJSON via the topojson `feature` method, then binds it to SVG path elements using `d3.geoPath` and `d3.geoMercator`. All drawing is handled in a single `json` promise callback with d3.v6.