What is a Heat Map?

Tableau heat map shows data values as density spots or heat spots on a map.

A heat map is also known as density heat map as it shows colored spots whose intensity and shade vary based on the number of values in a cluster of values.

More the number of values in a cluster, more dense it is and shown with a dark color on the map.

Therefore, we can use density heat maps or heat maps to analyse areas with densely or sparsely populated data.