{"version":"1.0","type":"rich","title":"Untitled","description":"This visualization displays Massachusetts household income data by town, overlaid on an interactive Leaflet map. The map uses D3’s `geoPath` with a `geoTransform` to render census tract boundaries, with each town’s fill color mapped via `d3.scaleDiverging` based on the hhinc80k salary bracket. A separate canvas-based color ramp legend is generated using the Canvas API. The data is loaded from external GeoJSON and CSV files, with Leaflet providing the base tile layer and pan/zoom controls.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/dc9b6318b6fe4bdf80d27d64854ac88d?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}