{"version":"1.0","type":"rich","title":"Final Project: 2024 Boston Marathon Data Vis","description":"This interactive visualization displays 2024 Boston Marathon finisher data aggregated by U.S. state on an Albers equal-area projection map. Users can toggle between four coloring metrics—number of finishers, average finish time, average age, and average second-half split difference—with darker state colors indicating higher values. Circle size encodes the finisher count per state. Built with D3.js and topojson-client, it loads state boundaries from the us-atlas TopoJSON, parses CSV data via d3.csvParse, and renders geographic paths using d3.geoPath and a tooltip on hover.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/8c16a528ddba42c0b0867f66f0f37115?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}