Choropleth

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Last edited Mar 28, 2017

Created on Mar 28, 2017

This choropleth maps the reported Lyme disease rates across U.S. counties from 2000 to 2015 using data from the CDC. An interactive slider animates the color-coded rates for each year, with county fill colors derived from a threshold color scale. Hovering a county reveals a tooltip comparing its 2000 and 2015 case counts and the change between them. The visualization uses D3 v3 with `d3.geo.albersUsa` for the projection, `d3.geo.path` for rendering, and `d3.nest` to organize the data by county and year.

AI-generated description

forked from <a href='http://bl.ocks.org/dougdowson/'>dougdowson</a>'s block: <a href='http://bl.ocks.org/dougdowson/9832019'>Choropleth</a>

forked from <a href='http://bl.ocks.org/Crunchytoastmmm/'>Crunchytoastmmm</a>'s block: <a href='http://bl.ocks.org/Crunchytoastmmm/4f219997029a94142cbb978aaa60d5d5'>Choropleth</a>

mit Licensed

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