Baidu · 2018–2019
Animated origin-destination flows showing inter-city population migration at provincial and city granularity.
Real mapv migration layer on Baidu Map · 15 cities, 56 OD pairs · animated polyline trails.
Baidu's public-facing migration big-data product — visualizes inter-city population flow at provincial and city granularity, daily. During Spring Festival it's one of the most-cited data products in Chinese media.
24 origin-destination flows across 9 cities, rendered as bezier arcs with three phased particles each. The same primitive used in the production map, scaled down.