{"version":"1.0","type":"rich","title":"Circles on a Map","description":"This example visualizes population by country using circles positioned on a natural Earth projection map, with circle area proportional to 2018 population data loaded from CSV. The map supports panning and zooming via d3.zoom, and hovering over a country reveals its name and population in a tooltip. The visualization uses d3.geoPath and topojson for rendering country boundaries, d3.scaleSqrt for sizing circles, and d3.scaleOrdinal with schemeSpectral for a color legend, all rendered as SVG with d3 v5.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/aa9bea1f55cc4c02ab25d3c0d8b5f686?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}