This example shows an orthographic world map where each country is rendered as a clickable, hover-responsive SVG path. The visualization uses D3’s `geoOrthographic` projection and `geoPath` to draw country boundaries from TopoJSON data, with country names loaded from a TSV file using `d3.tsv`. Data is combined via `Promise.all` and merged using a lookup object keyed by country ID. Hovering turns a country black, and each path includes a `<title>` element to display the country name as a tooltip.