{"version":"1.0","type":"rich","title":"Ok, what about a color legend","description":"This example displays a Mercator projection world map using d3.geoPath and TopoJSON world-atlas data, overlaid with circles representing video views from the Harvardx/MITx online course dataset. An ordinal color scale identifies courses, and a d3.scaleSqrt sizes points by view count. The React component renders an SVG with interactive hover states: a color legend built with React elements allows filtering and fading of map circles to highlight specific courses through d3.csv-loaded data.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/8cdbf192f1934423a42cc31cde563b8f?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}