{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This example visualizes global population data from 2018 using scaled circles overlaid on a natural Earth projection map. The area of each circle corresponds to a country’s population, while hover tooltips show exact values and region names. The visualization supports pan and zoom via the `d3.zoom` behavior. The map and circles are rendered as SVG, using `d3.geoPath` for geographic outlines, `d3.geoNaturalEarth1` for projection, and `d3.scaleSqrt` for circle sizing. A separate size legend and color legend are generated with custom D3 modules.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/7239a21dad754024883d6eb5bab22725?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}