{"version":"1.0","type":"rich","title":"v6 - Boston Crash Map","description":"A geospatial treemap of Boston crash records from the city’s Vision Zero program maps point locations from a CSV onto a GeoJSON boundary. The visualization uses `d3.geoMercator` with a center on Boston and `d3.geoPath` to render the neighborhood polygon, while individual crashes are projected as points. The code imports crash data via `crashes.csv` and draws them in an SVG container, showing the geographic distribution of incidents by their `dispatch_ts` and `mode_type` attributes.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/303130b33a7e472e876e0611bda5abae?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}