{"version":"1.0","type":"rich","title":"Mapping Part 3: Cities and Pop.","description":"This example visualizes the populations of cities on a world map, using circles sized proportionally to population data. It shows a geographic context with landmasses, graticules, and sphere outlines, layered with semi-transparent teal points. Built with React and d3.v5, the map uses `geoNaturalEarth1` for projection and `geoPath` for rendering. City data is loaded from a CSV, while geographic boundaries come from the world-atlas TopoJSON dataset. Circle radii are scaled using `scaleSqrt`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/5cbcad07f3db4cc2af58c63a6dfb2523?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}