Circles on a map
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This map visualizes global population data for 2018, overlaying semi-transparent circles on a natural Earth projection. Countries without data appear in light red, while those with values are gray and display proportional circles positioned at their centroids. The visualization uses D3 v5 with `geoNaturalEarth1`, `geoPath`, `geoCentroid`, and `scaleSqrt` for sizing, plus `topojson` for world geometry. Hovering reveals a tooltip with the region name and formatted population. A size legend explains circle scaling, and zooming is enabled via `d3.zoom`.
AI-generated descriptionMIT Licensed