Fork of World Countries Tree
This visualization shows the hierarchical structure of world countries organized by continent and subregion, displayed as a horizontal tree layout. The D3 v5 code loads hierarchical JSON data and renders it as an SVG using d3.tree, d3.hierarchy, and d3.linkHorizontal for the curved links. Text labels show country names with font sizes scaled by depth, while d3.zoom enables panning and zooming on the interactive graphic.