> For the complete documentation index, see [llms.txt](https://docs.wem.io/platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wem.io/platform/wemtipsandtricks/widgets/advanced-charts/treemap.md).

# Treemap

A Treemap data visualization technique is used to display hierarchical data using nested rectangles; the treemap chart is created based on this technique of data visualization.

The treemap chart is used for representing hierarchical data in a tree-like structure. Data, organized as branches and sub-branches, are represented using rectangles, the dimensions and plot colors of which are calculated.

{% hint style="info" %}
You can find a more in depth explanation about the treemap on [this](<https://apexcharts.com/docs/options/plotoptions/treemap/  >) page: [https://apexcharts.com/docs/options/plotoptions/treemap/  ](<https://apexcharts.com/docs/options/plotoptions/treemap/  >)
{% endhint %}

![Tree Map](/files/LqhIDm7naGhrRCxnGQTj)

**Properties of Tree Map Chart**

| **Property Name** | **Data type** | Type       | **Description**                                                          |
| ----------------- | ------------- | ---------- | ------------------------------------------------------------------------ |
| Data source       | List          | Data Model | Data list source for the widget.                                         |
| Series            | Text          | Expression | This field is used to create different groups from the same data source. |
| Categories        | Text          | Expression | This field is used to create different groups by series values.          |
| Values            | Number        | Expression | The values of the chart.                                                 |
| Chart Title Size  | Text          | Dropdown   | To set the size of the font for the title. (H1, H2, H3, H4, H5).         |
| Chart Title       | Text          | Expression | To set the title of the chart.                                           |
| Height            | Number        | Expression | Can be set to number, percentage of container or pixels.                 |
| Width             | Number        | Expression | Can be set to number, percentage of container or pixels.                 |
| Prefix            | Text          | Expression | Display a prefix for values on tooltip.                                  |
| Postfix           | Text          | Expression | Display a postfix for values on tooltip.                                 |
| Label Decimals    | Number        | Expression | Set number of decimals displayed.                                        |
| Tick Amounts      | Number        | Expression | Number of visual ticks for the scale on the vertical axis.               |


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