{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This visualization shows global population by country, with circles positioned at each country’s centroid. Circle area encodes population size, while a size legend communicates the scale; hovering reveals exact values or “missing data.” Users can pan and zoom the map. Built with D3 v5, it uses `d3.geoNaturalEarth1` and `d3.geoPath` for projection, `d3.zoom` for interaction, and `d3.scaleSqrt` for area encoding. Country boundaries come from TopoJSON, with population data loaded via CSV.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/74e58f7d69314450ac4b347b8fc4cde0?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}