{"version":"1.0","type":"rich","title":"Fork of Opacity Linear Scale - playground","description":"This map of New York census tracts colors each polygon by the proportion of white residents, using a green opacity scale on a black background. The visualization fetches demographic data from the American Community Survey API and TopoJSON geographic boundaries, then renders them as SVG paths with `d3.geoPath`. A linear color scale (`d3.scaleLinear`) maps values to `rgba()` strings with varying opacity, while `d3.zoom` enables panning and zooming. The mouseover logs tract properties to the console, and the CSS styles polygons with hover strokes.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/15ba506669a844d8a791a96ba816dbb5?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}