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Choropleth population map

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Vvishusikka
Last edited Apr 14, 2022
Created on Apr 14, 2022

A choropleth map of the United States displays state-level population counts from 1990, using a color gradient from light orange to dark red. The map is rendered as SVG with D3 v3, leveraging `d3.geo.path` and TopoJSON for state boundaries. Population data from a CSV file is joined to state IDs, and a custom `d3.scale.quantize` interpolates colors across 100 steps. Hovering over a state triggers a tooltip and animates opacity, while the legend and interactivity are built with jQuery and D3 transitions.

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MIT Licensed

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