# Heat grid

Display a chart in three dimensions, showing two categorical dimensions and an aggregate dimension by color.

* Supported aggregation metrics: min, max, sum, average, count, unique count, percentile, standard deviation, and variance
* Percentile, standard deviation, and variance metrics are not supported for object types backed by [Object Storage v1 (Phonograph)](../../object-backend/overview/index.md#object-databases).

## Input type

Object set

## Output type

Object selection

## Usage information

| Functionality | Availability |
| --- | --- |
| [Standard Quiver card](../core-concepts/index.md#cards) | Supported |
| [Transform table transform](../cards-transform-table/index.md) | Unsupported |