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Last edited Apr 13, 2023

Created on Apr 13, 2023

This example presents a hierarchical tree visualization of geographic regions in India, from the country down to local districts. The tree is rendered as an interactive SVG diagram with rounded rectangular nodes, using a collapsible layout. The code employs D3.js v3's tree layout, `d3.layout.tree`, to compute node positions, with custom SVG elements for nodes and links, including arrow markers. Color-coded node types and zoom/pan behavior via `d3.behavior.zoom` enhance exploration. The data is loaded from a JSON file defining the nested structure, and the visualization is built within a React component using raw D3.

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A bare minimum HTML page demonstrating use of CSS and JavaScript.

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