{"version":"1.0","type":"rich","title":"Activity6_Tutorial_1","description":"A horizontal bar chart displays population figures for the top 30 countries in 2020, sourced from a CSV hosted on GitHub. The chart encodes population on a linear x-axis and country names on a categorical y-axis using colored bars. The visualization is built with D3 v7, using `d3.scaleLinear`, `d3.scaleBand`, and SVG rendering. Axis labels are added manually; the x-axis uses a custom tick format to display large numbers in billions. The rendering pipeline fetches data via `d3.csv`, selects the top 30 rows, and draws the marks with `Marks.js`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/6b5991e6f8c84e4f8eab75d30b561773?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}