This tree visualization maps university courses through a hierarchical structure of departments, levels, and individual courses, with each depth level colored distinctly. Built using D3.js v7, it renders as an SVG with interactivity, displaying tooltips when hovering over nodes. The data is loaded from a remote CSV file, and the layout is generated using D3's `d3.tree()` and `d3.hierarchy()` functions, with `d3.linkVertical()` creating the connecting edges.