USA Map

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Last edited Jul 19, 2023

Created on Jul 19, 2023

This choropleth map of the United States colors each state according to a numeric value loaded from a CSV file, using a linear lightred-to-red scale. The SVG rendering is built with d3.geoPath, which projects the US states from a GeoJSON file, while topojson.feature extracts the state features. State FIPS codes from the CSV are matched against the GeoJSON IDs to assign fills, with gray as the default for missing data. The visualization relies on d3.select, d3.csv, and d3.json for data loading.

AI-generated description

A bare minimum HTML page demonstrating use of CSS and JavaScript.

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