A heat map (or heatmap) is a graphical representation of data where the individual values contained in a matrix are represented as colors. The term 'heat map' was originally coined and trademarked by software designer Cormac Kinney in 1991, to describe a 2D display depicting financial market information, though similar plots such as shading matrices have existed for over a century - wikipedia 
# See also * History * Types * Colour schemes * Choropleth maps vs. heat maps * Software implementations * Examples * See also * References * External links