{"version":"1.0","type":"rich","title":"heatmap2","description":"This heatmap demonstrates global population distribution using a textured choropleth map. Each country is filled with a circle pattern whose density increases with population size, using six threshold-based visual levels. The visualization employs D3.js v4 with the `d3.geoMercator` projection and `d3.geoPath` to render world GeoJSON boundaries, while the `textures` library generates varying circle sizes for the fills. Population data comes from a CSV file matched to country codes, with color thresholds defined by `d3.scaleThreshold` and ranges from sparse to dense circle patterns.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/85671c7475ce40ba8324cc8d6b2de9f8?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}