This example demonstrates how to load and prepare geographic data for mapping. The page renders an empty SVG canvas and uses D3's `select` and `json` functions to request a world-atlas TopoJSON file from a remote URL. The code then applies the `topojson.feature` API to convert the raw TopoJSON geometry into GeoJSON feature objects for the world's countries. While the resulting shapes are not yet drawn, the visualization establishes the data pipeline for a future map projection and rendering step.