流型图在地图学中是地图和流程图的混合体，用来表示对象从一地运动到另外一地，比如迁徙中人口的数目、货物交换的数量，或是网络中数据分组的数量。

Flow maps in cartography are a mix of maps and flow charts, that "show the movement of objects from one location to another, such as the number of people in a migration, the amount of goods being traded, or the number of packets in a network".