This interactive world map visualizes cities with populations exceeding 50,000, plotted as semi-transparent teal dots over a light gray landmass. The map employs the Natural Earth projection via `d3.geoNaturalEarth1` and `d3.geoPath` to render country boundaries, graticules, and interior borders using SVG paths. City coordinates are projected with the same projection and drawn as circles, with data sourced from the Simplemaps World Cities Database. The visualization is built with React and D3 v5, loading both GeoJSON topology and CSV data asynchronously before rendering.