Color Systems - RGB & CMYK
590 cities / hue = longitude, value = latitude
Historic maps & visualization
"Historical Election Maps and Open Mapping Research" By Andrew Plemmons Pratt | Tuesday, November 4th, 2008 Science Progress
MapCarte - a daily blog of historic and current map design
"Inequality across the country, in two maps" Posted by Dylan Matthews on September 24, 2012; The Washington Post
"Mapping Superstorm Sandy" by David Heyman, AxisMaps.
Obama’s Diverse Base of Support - Interactive Feature - NYTimes.com, 7 Nov 2012