{"version":"1.0","type":"rich","title":"Zoomable Treemap Bar Chart","description":"This zoomable treemap bar chart visualizes U.S. trade balances with countries worldwide, using nested rectangles sized by trade value and colored by continent. Clicking a country zooms the view to focus on that nation's trading partners, smoothly animating the treemap's layout via D3 transitions. The visualization is built with D3 v4 and SVG, leveraging a hierarchical dataset from Census trade data to show import/export relationships across years, continents, and countries. Interaction enables users to drill into specific countries, with the treemap restructuring to highlight the selected nation while non-selected regions fade and reposition.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-ec84deb23dcfa684a33fc971a36cd70d?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}