> ## Documentation Index
> Fetch the complete documentation index at: https://docs.invoca.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Geo Heatmap Charts

> Geo heatmap charts display the value of a Measure through the depth of color across an area on a map.

Geo heatmap charts display the value of the Measure through the depth of color of the area — useful for seeing the relative value or density of a Measure by location, such as sales relative to customer zip code.

To use a geo heatmap chart, your search must include a geographical column, or a longitude and latitude pair. Invoca supports geographical visualizations for many countries.

See the full introduction to [Geo charts](/s/article/geo-charts) for the specifics of working with them.

## Limitations

Geo heatmap charts do **not** support conditional formatting.

## Where to go next

* [Geo charts](/s/article/geo-charts)
* [Geo area charts](/s/article/geo-area-charts)