# Hierarchical Tree Diagram - Iteration 4

# Organizational Hierarchy Explorer

Click nodes to expand/collapse departments

Visualization inspired by: D3 Collapsible Tree

Data from: Organization API (simulated)

Created: 2025-10-10T23:54:25Z

{ "iteration": 4, "web_source": "https://observablehq.com/@d3/collapsible-tree", "techniques_learned": [ "Hierarchical tree layout with d3.tree", "Collapsible nodes with state tracking", "Smooth transitions for expand/collapse" ], "data_source": "https://api.example.com/org", "created": "2025-10-10T23:54:25Z" }