{"version":"1.0","type":"rich","title":"U.S. States","description":"A choropleth map of U.S. states and world country borders, colored by population data (pop2005), uses a linear color scale from light gray to dark blue. The visualization, built with D3 v3, renders geographic features as SVG paths via `d3.geo.path` and a Mercator projection (`d3.geo.mercator`). Population data is loaded as TopoJSON from a CartoDB SQL API endpoint, and users can pan and zoom the map through `d3.behavior.zoom`, which updates the SVG group’s transform on redraw.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-4532261?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}