This fork of a polished world map visualizes global city populations using a natural Earth projection. The visualization displays landmasses, country interiors, graticules, and a sphere outline, with city markers sized proportionally to population using a square root scale. It loads TopoJSON country boundaries from the world-atlas package and city data from a CSV file, processing them with d3's geoNaturalEarth1, geoPath, and geoGraticule utilities. The React rendering uses SVG paths and circles, styled with custom CSS classes for a clean, refined aesthetic.