{"version":"1.0","type":"rich","title":"NASCAR  Track Map","description":"This map shows the locations of 27 NASCAR tracks that hosted races between 1975 and 2003. Each circle marks a track, colored by a categorical scale, and hovering reveals the track’s name, type, length, status, and driver with the most wins. The visualization uses Vega-Lite and vega-lite-api to layer an Albers USA projection of U.S. states with a circle mark layer, and includes a dropdown menu for filtering by track name. Data is loaded from a CSV via d3.csv.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/83f502237c234b50b205b7f9aea671a5?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}