{"version":"1.0","type":"rich","title":"Final Project Progress 3","description":"This interactive choropleth map visualizes 2024 Boston Marathon finisher data by state, showing participant counts, average finish times, average age, and first- versus second-half split times. The map uses d3.geoAlbers and d3.geoPath to render U.S. states from TopoJSON data, with d3.scaleLinear color scales encoding the selected metric. Hovering over a state displays a custom HTML tooltip with the detailed statistics. The code fetches external CSV data for state centers and finisher records, filtering out Puerto Rico and the U.S. Virgin Islands.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/30157fd3d6ac402d95ca570c0abad79f?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}