{"version":"1.0","type":"rich","title":"Muni Ridership 2019-2020/Pandemic","description":"This interactive line chart visualizes San Francisco Muni’s average daily boardings from 2019 through 2021, highlighting the drastic ridership drop caused by the COVID-19 pandemic. The SVG rendering uses React and D3 v6, with `scaleTime` for the date axis, `scaleLinear` for ridership, and a natural curve via `line` and `curveNatural`. Data comes from a remote CSV loaded with `csv`. Axes are custom React components, while a tooltip is planned but not yet implemented.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d1f22bec7a674be2a68afdede4ab5b44?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}