{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This example visualizes population by country using scaled circles overlaid on a natural Earth projection map, with circle area proportional to each country’s 2018 population. Pan and zoom are enabled via d3.zoom, and hovering over a country reveals its exact population through a title tooltip. The map is rendered as SVG using d3.geoPath and topojson, while a d3.scaleSqrt maps population values to circle radii. A size legend generated with custom d3 code displays population ticks, and the data is loaded from a CSV and a TopoJSON world atlas file.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/7a3063ec88d648cca5578d080b6b90b8?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}