{"version":"1.0","type":"rich","title":"hw7_test","description":"This visualization presents a horizon chart comparing daily air quality measurements across multiple pollutants (SO₂, NO₂, O₃, CO, PM10, PM25) over time for individual monitoring stations. The data comes from a local CSV file, and the chart uses a time-series x-axis with each pollutant group rendered as its own horizon band. Built with D3 v6, the implementation relies on `scaleUtc`, `scaleLinear`, `area`, `clipPath`, and `axisTop` to stack three overlaid area bands per row, using color density to encode magnitude. The SVG output is styled with Bootstrap and custom CSS.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/9445ee15f7ee4f17b449130539052713?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}