This visualization displays a world map using a Natural Earth projection, highlighting the top 10 countries by GDP in green while rendering all other countries in gray. The map is built with `d3.geoNaturalEarth1` for projection, `d3.geoPath` for rendering country outlines, and `d3.geoGraticule` for the graticule. Country names and GDP values appear as labels on hover, with data sourced from the visionscarto-world-atlas. The code uses `topojson-client` to convert the TopoJSON data into GeoJSON features.