{"version":"1.0","type":"rich","title":"Massachusetts Chrolopleth map with interactive legend","description":"This interactive choropleth map of Massachusetts displays county boundaries, with each town colored according to its county. A legend on the right uses an ordinal color scale and responds to mouse hover, dimming non-matching map regions and highlighting the selected county. Built with React and D3 v5, it uses `d3.geoAlbers` and `d3.geoPath` to project and render TopoJSON features converted from Massachusetts town boundary shapefiles via mapshaper. County assignments come from a CSV mapping file, and the legend uses `d3.scaleOrdinal` for color encoding.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/7c20a38e22d8485392c673c005794ad8?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}