United States Educational Attainment

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United States Educational Attainment

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Last edited Jan 6, 2020

Created on Jan 6, 2020

A choropleth map of the United States displays the percentage of adults aged 25 and older with a bachelor's degree or higher, using data from the USDA Economic Research Service (2010-2014). County polygons are rendered via `topojson.feature` and `d3.geoPath`, colored by a threshold scale with the `d3-schemeGreens` palette. A tooltip, built with D3's `d3.select` and `d3.map`, shows each county’s area name, state, and percentage on mouseover. The map includes a legend generated with `d3.axisBottom` and a matching color scale.

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