{"version":"1.0","type":"rich","title":"USA 2012 presidential election value-by-alpha (d3v3)","description":"This visualization displays the 2012 U.S. presidential election results at county level using a value-by-alpha choropleth map. Each county polygon is colored by its winning candidate—blue for Obama, red for Romney—with opacity encoded to the winner's vote percentage. The map renders in SVG with smooth animated transitions, using D3.js v3 to load the TopoJSON of county-level election returns and project them geographically. The visualization highlights the geographic distribution of vote margins, with more intense colors representing stronger support. Built with Blockbuilder.org, this work is a fork of almccon's original election map and is released under the MIT license.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-04b8859a5f8f259b82e2d3ecf73bca1f?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}