Choropleth

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Last edited Sep 2, 2016

Created on Sep 2, 2016

This choropleth maps U.S. county-level unemployment rates from 2008, encoding values with a d3.scaleQuantize that bins rates from 0 to 15% into nine color classes. Rendered with SVG, the map uses a white state boundary overlay to delineate county borders, while the quantized color scale (from light blue to dark navy) visually distinguishes unemployment ranges. The visualization is built with D3 v4 and TopoJSON, and it includes a resize handler to scale the map responsively.

AI-generated description

This choropleth encodes unemployment rates from 2008 with a quantize scale ranging from 0 to 15%. A threshold scale is a useful alternative for coloring arbitrary ranges.

forked from <a href='http://bl.ocks.org/mbostock/'>mbostock</a>'s block: <a href='http://bl.ocks.org/mbostock/4060606'>Choropleth</a>

gpl-3.0 Licensed

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