{"version":"1.0","type":"rich","title":"Fork of Fork of Fork of D3 world map example with TopoJSON to GeoJSON and circular indicators","description":"This example visualizes a choropleth world map where each country’s fill color reflects its birth rate, using a linear blue scale. It also plots four city locations (Fairbanks, Boston, Philly, COS) as small circles, positioned via a Mercator projection with `d3.geoPath`. The map is built with D3 v4, loading GeoJSON country boundaries and CSV data via `d3.json` and `d3.csv`. The code uses `d3.geoMercator`, `d3.scaleLinear`, and `d3.extent` to drive the color mapping and projection.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/77983cba7cf547a199fe702760feae4d?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}