This example visualizes the distribution of U.S. cities and their populations as small dots overlaid on a map of the United States, with state boundaries outlined in white. It first renders the country outline and graticule, then projects each city’s longitude and latitude using `d3.geoAlbersUsa` and draws them as circles. The visualization fetches TopoJSON state boundaries from `us-atlas` and CSV city data from a GitHub-hosted dataset, parsing populations with D3’s `csvParse`. A subtle graticule grid and black outline frame the map, while city dot radius remains fixed at 0.2 pixels.