{"version":"1.0","type":"rich","title":"Multivariate Choropleth","description":"This example visualizes racial demographics across New York census tracts using a multivariate choropleth map. It blends three color scales—green for white population, orange for Black population, and blue for Asian population—using multiplicative color blending via the `colorBlend` library to create a composite hue. The map renders census tract boundaries as SVG paths using `d3.geoPath` with `topojson` features. Population data from the American Community Survey is joined by tract ID, and all values are scaled against a global maximum using `d3.scaleLinear` with opacity gradients.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/29d42aaeacb2495e8f99877b12fd9869?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}