BTA Charts
ChartsHierarchical

Zoomable Treemap

Explore hierarchical data as nested rectangles sized by value with interactive zoom. Rectangle area directly encodes the underlying measure, making it easy to spot the largest items at a glance. Click any cell to drill into its children. Ideal for disk usage, market capitalization, and budget analysis.

Examples

When to Use

  • Spotting the largest categories at a glance in a flat or nested hierarchy
  • Disk usage, market cap, or revenue breakdown by segment
  • Comparing sizes across many items where a bar chart would be too long
  • Interactive drill-down into nested category data

Data Roles

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Settings

Color & Appearance

Color Scheme

dropdown

Controls the color palette for treemap cells.

Default: vibrant

Treemap Border

Border Color

color

Color of cell borders separating nested rectangles.

Default: #ffffff

Border Width

number

Width of cell borders in pixels.

Default: 2

Common settings like Legend, Tooltip, and Small Multiples configuration are covered in Shared Concepts.

Tips & Best Practices

  • Click any rectangle to zoom into that subtree; click the header bar to zoom back out
  • Treemaps are ideal for spotting the largest items at a glance -- area encodes value intuitively
  • Adjust border width and color to make nested levels more distinct

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