{"version":"1.0","type":"rich","title":"Population Density","description":"This choropleth map visualizes global population density across selectable years (1980, 2000, 2010, 2022) using a Mercator projection via `d3.geoMercator` and `d3.geoPath`. A threshold color scale maps density values to a blue sequential palette, with country-level data loaded from a raw GitHub CSV. Users interact through a dropdown to switch years, triggering map redraws and an animated tooltip on hover showing country name and density. A sidebar ranks the top ten most densely populated countries for the chosen year.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/351f1d0dfd4544539de012a296ea0d65?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}