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USA pm25 pollotion
This interactive choropleth map displays PM2.5 pollution concentrations across US counties from 2018 to 2021. A sequential color scale using d3.interpolateReds shades counties, with a slider and play button animating through years. Built with React and d3-array, the visualization uses d3.geoPath and geoIdentity projection to render county boundaries from US Atlas TopoJSON data. A color legend with a linear gradient shows the concentration scale, and hovering reveals county names and values via SVG titles.
AI-generated descriptionThe final version of the Data Visualization final project.
Data of PM2.5 concentration from PM2.5 by County.
County and state boundries from US county altas.
Adapted and extended from Mass School District Boundaries
Inspired by Choropleth.