This example displays a world map using a cylindrical stereographic projection, rendered with SVG. The map fills the viewport, with each country drawn as an orange polygon outlined in black, using `d3.geoPath` combined with TopoJSON data. The projection is implemented through a custom `geoCylindricalStereographic` function derived from `parallel1.js`, and the map’s styling is controlled via CSS classes assigned to the country elements. The visualization relies on `d3` version 5 and `topojson` to process and display the geographic data.