This example shows an interactive world map that supports zooming and panning, with country names revealed on hover. It renders geographic data using D3’s `geoNaturalEarth1` projection and `geoPath` into SVG, with country boundaries from TopoJSON and names from a TSV file. The zoom behavior is implemented via `d3.zoom`, applying a transform to a group element. Hover effects increase stroke width via CSS, while `title` elements display each country’s name.