{"version":"1.0","type":"rich","title":"Multivariate Choropleth","description":"This example visualizes racial demographics across New York census tracts using a multivariate choropleth. The map blends three color scales—blue for White, green for Black, and red for Asian populations—into a single fill per tract, with hover tooltips showing exact counts. It uses the D3 library’s `geoPath` for rendering TopoJSON geometries and `scaleLinear` for each racial category, while the `colorBlend` library composites the overlapping colors. Data comes from the 2018 American Community Survey, fetched via JSON, and the visualization supports zooming through D3’s `zoom` behavior.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/f230fc93c1bc4d878fb40842f5112e90?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}