Sized Points on a Map
This visualization displays a world map with cities whose population exceeds 50,000, using sized circles to represent population magnitude. The map includes country borders and graticules, styled with a clean, minimal aesthetic. Built with React and D3 v6, it uses `d3.geoPath` for map rendering, `d3.scaleSqrt` to size circles by population, and loads geographic data from World Atlas TopoJSON and city data from Simplemaps via `d3.csv` and `d3.json`.