{"version":"1.0","type":"rich","title":"Flow Map","description":"This flow map visualizes lumber exports from Puget Sound to 15 international ports during 1882-83, with each route's stroke width proportional to the volume of board feet exported. Built with D3 v4 and rendered as SVG, the map uses a Kavrayskiy VII projection to display world landmasses in green against a blue ocean. The source port is marked with a white circle labeled \"Puget Sound\", while destination ports appear as white circles with red outlines sized by export volume, accompanied by text labels with manual offsets to reduce overlap. Route paths connect the source to each destination, with stroke widths scaled linearly by export volume, allowing immediate visual comparison of trade flow magnitude across destinations in the Pacific Rim.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-8de4b9d0d0a87a478770e0cc86e2f5e4?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}