This interactive visualization shows a hierarchical tree of commercial data, mapping a top-level "Commercial" category down through subcategories like "Surface Access" and individual leaf nodes such as "Parking" and country names. The network uses a tidy tree layout with horizontal links connecting parent and child nodes, with text labels sized proportionally to their depth in the hierarchy. Built with D3 v5, the code employs the `tree`, `hierarchy`, `linkHorizontal`, and `zoom` APIs, rendering an SVG that supports pan and zoom interactions via the `zoom` event.