Heatmap
Level 2 Category
Definition
Visualization using color intensity to represent data values in a matrix, with darker/warmer colors typically indicating higher values
Example Image
© Severino Ribecca, available at https://datavizcatalogue.com/. Reproduced courtesy of Mr. Ribecca.
Writing Alternative Text
Describe the variables on each axis, the meaning of the color scale, and any notable clusters, gradients, or patterns.
Example Alt Text
"Heatmap compares monthly values for Towns A through L from January to December; the measured variable and scale are not labeled. Most towns shift from cooler winter tones to warmer tones from late spring through summer. Town K has the longest warm period, from about April to September, with a July peak. Towns D and H also peak in midsummer, while F and J vary little and L changes modestly."