{"version":"1.0","type":"rich","title":"Fork of A9-Proportional symbols","description":"This proportional symbols map visualizes the global distribution of MOOC subscribers, using a choropleth color scheme where darker reds indicate higher subscriber counts. The map uses a Mercator projection, rendered via `d3.geoPath` and `d3.geoMercator`, with data loaded from a CSV file containing country codes and totals. A `d3.scaleThreshold` color scale maps subscriber ranges to a red color scheme, and a legend created with `d3.legendColor` explains the thresholds. The geographic boundaries come from a GeoJSON world map.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/e114100aa5724f72938cfcd21bb6dde7?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}