{"version":"1.0","type":"rich","title":"Fork of Circles on a Map","description":"This visualization displays global population by country in 2018, with semi-transparent circles positioned at each country's centroid whose area encodes population size. The map uses a natural Earth projection rendered through `d3.geoPath`, while population data loads from a CSV file and country boundaries come from TopoJSON. Users can pan and zoom via `d3.zoom`, and hovering over a country reveals its name and population in a tooltip. The code also implements custom size and color legends, with the latter built using `scaleOrdinal` and `schemeSpectral`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/0638e953121d4bf4859018f6af27f480?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}