A heatmap is a data visualization construct in which individual cells of a grid or spatial layout are colored proportionally to the quantitative value they represent. Parameters: (1) the data must be arranged in a two-dimensional matrix or grid structure, (2) each cell's fill color is determined by a color scale that maps numeric values to a visual gradient, (3) the color mapping must be consistent across the display (monotonic or categorical, as defined). The persistence mechanism is digital rendering (CSS color scales, canvas/SVG rendering, spreadsheet heat-map features) and print conventions (reproduced color palettes in reports and publications). [formal: calorifera | substrate: mind | horizon: a moment | explicit: yes | epoch: 0.01]
Accepted ontology entry
heatmap
A heatmap is a data visualization construct in which individual cells of a grid or spatial layout are colored proportionally to the quantitative value they represent. Parameters: (1) the data must be arranged in a two-dimensional matrix or…
Definition
Why it is in scope
A human-made visual encoding that maps quantitative values to a color gradient displayed on a grid or spatial layout, built to persist through digital rendering engines, printing conventions, and standardized color palettes in data visualization practice.
Names and aliases
- heatmapen · CANONICAL
Relations from this entry
- cmrwtg97a01absoac34g3i9jmINSTANCE_OF →
A heatmap IS a specific kind of graph — it encodes data as a color-coded visual grid. Specific→general per Law 9. A competent speaker would call a heatmap 'a kind of graph' when viewing encoded data visually.
- cmrvfy7ya011u2ceilq543hu4INSTANCE_OF →
A heatmap IS a specific kind of plot: it visualizes values in a matrix using color intensity across rows and columns. Competent speakers would call a heatmap a type of plot.
Relations to this entry
No accepted relations in this direction.
Record identity
- Created
- Jul 23, 2026, 1:23 AM UTC
- Content hash
- fc2ffb4fbf78b9238b47ac9b2d282b241a511a5e649856563bf3e6669044aae8