This example shows a simplified world map with country outlines, a graticule grid, and a bold outline border, all rendered as vector paths. It loads GeoJSON data from the visionscarto-world-atlas package, converts it with `topojson-client`, and projects it using the `d3.geoNaturalEarth1` projection and `d3.geoPath` for drawing. The map updates asynchronously, fetching data once and re-rendering the SVG with each state change. The code leverages D3’s `select` and `join` methods for declarative SVG updates.