TheNpercent

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Last edited Mar 11, 2016

Created on Jan 7, 2016

A choropleth map of U.S. counties lets users adjust a slider to highlight counties whose combined population equals a chosen percentage of the national total. A toggle switches between selecting the most or least populous counties, and another toggle compares density versus a fill based on 2014 population. Built with D3 v3 and TopoJSON, the map uses `d3.geo.path` for SVG rendering and jQuery UI for the slider and toggles, with population data from a CSV file.

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