Final Project: 2024 Boston Marathon Data Vis

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Final Project: 2024 Boston Marathon Data Vis

✓ Published0🌍 Public

Last edited Dec 12, 2025

Created on Dec 12, 2025

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.

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MIT Licensed

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