This example displays a world map using an equirectangular projection, rendered as an SVG graphic. The map is drawn with countries filled in orange, each with a white stroke, and a blue sphere representing the globe's background. Hovering over a country changes its fill to green. The visualization is built with D3.js version 5 and TopoJSON version 3, loading country boundaries from the world-atlas countries-110m.json file. It uses `d3.geoEquirectangular` for projection, `d3.geoPath` for generating SVG paths, and TopoJSON's `feature` method to convert the dataset into GeoJSON features.