{"version":"1.0","type":"rich","title":"Basic Weather Fronts - markers along topojson lines","description":"Four semi-transparent weather fronts are drawn as thick black paths over a Kavrayskiy VII-projected world map, with graticule and country boundaries. Each front is decorated with repeated SVG markers—semicircles or triangles—that are placed along the path length using `getPointAtLength()`. The marker style alternates by line index, simulating warm and cold front symbols, and the markers are oriented automatically along each front.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-d72ffa31194b494d4f388972beba466b?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}