{"version":"1.0","type":"rich","title":"Untitled","description":"This interactive visualization displays regional population data over time, where each region appears as a color-coded circle whose radius corresponds to a selected year’s population value. A slider controls the year from 1946 onward, triggering a smooth transition that resizes the circles to reflect changing data. The SVG renderer uses D3.js v3 scales and axes, with circle positions fixed by an ordinal x-axis and a linear y-scale for sizing. Hovering reveals tooltips with region and population details, while the data is loaded from an external CSV file.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/86470e0ccf2440ee99bac36aea2fa2d9?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}