{"version":"1.0","type":"rich","title":"Circle on a Map","description":"This example visualizes global population data by overlaying semi-transparent circles on a natural Earth projection map. The circles are sized using `d3.scaleSqrt` based on 2018 population figures, and hovering over countries reveals their population via a tooltip. The visualization uses `d3.geoPath` with `geoNaturalEarth1` for map projection, `d3.zoom` for panning and zooming, and includes both a color legend and a size legend built from `d3.scaleOrdinal` and `d3.scaleSqrt`. Data is loaded from a CSV file and TopoJSON world atlas using `d3.csv` and `d3.json`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/bc0dc6708f1b4efca8b7bd63f6be0401?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}