{"version":"1.0","type":"rich","title":"Untitled","description":"A treemap visualizes the distribution of Czech energy sources, with rectangles sized by value and labeled with names like uhlí, nafta, and plyn. The code uses D3 v4’s `d3.stratify` to build a hierarchy from CSV data and `d3.treemap` to compute layout positions. SVG rectangles and text labels are appended to the chart, with fills styled via a linked stylesheet.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d52f97b623d7423498133feda7099ee7?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}