A map of the world is drawn on an SVG canvas, with countries filled in lime and the sphere of the Earth rendered in light blue. The visualization uses D3.js (v5) and the topojson library to load GeoJSON data from the world-atlas package. The `geoPath` and `geoMercator` projections from D3 generate the map geometry, while the `select`, `json`, and `feature` functions style and arrange the country paths.